Nickel allergy as risk factor for hand eczema: a population-based study

Summary Background In population‐based studies using self‐reported nickel allergy, a hand eczema prevalence of 30–43% has been reported in individuals with nickel allergy. In a previous Swedish study, 958 schoolgirls were patch tested for nickel. In a questionnaire follow up 20 years later no association was found between nickel allergy and hand eczema. Objectives To investigate further the relation between nickel allergy and hand eczema. Methods Three hundred and sixty‐nine women, still living in the same geographical area, now aged 30–40 years, were patch tested and clinically investigated regarding hand eczema. Results Patch testing showed 30·1% nickel‐positive individuals. The adjusted prevalence proportion ratio (PPR) for hand eczema after age 15 years in relation to nickel patch test results was 1·03 (95% confidence interval, CI 0·71–1·50). A history of childhood eczema was reported by 35·9%, and the PPR for hand eczema in relation to childhood eczema was 3·68 (95% CI 2·45–5·54). When analysing the relation separately in women with and without a history of childhood eczema a statistical interaction was found. The hand eczema risk was doubled in nickel‐positive women without a history of childhood eczema, with a PPR of 2·23 (95% CI 1·10–4·49) for hand eczema after age 15 years. Conclusions A doubled risk for hand eczema was found in nickel‐positive women without a history of childhood eczema. When analysing all participants, there was no statistically significant difference between nickel‐positive and nickel‐negative women regarding occurrence of hand eczema. The most important risk factor for hand eczema was childhood eczema. The risk for hand eczema in nickel‐positive women may previously have been overestimated.     

Tobacco smoking and hand eczema: a population‐based study

Background Tobacco smoking has been proposed to promote hand eczema. Objectives To examine the association between tobacco smoking and hand eczema and to investigate a possible dose‐response relation. Methods A national environmental health survey was performed in 2007. A questionnaire was mailed to 43 905 individuals and responses were obtained from 25 851 (59%). Questions on 1‐year prevalence of hand eczema and on previous and current smoking were included. Respondents were asked to report number of cigarettes per day and to provide information on history of atopy and frequency of hand exposure to water. Results In total, answers regarding smoking and hand eczema were obtained from 25 428 individuals. Of regular daily smokers, 10·0% reported hand eczema vs. 9·1% of nonsmokers (P = 0·0951). A history of atopy showed the strongest influence on the occurrence of hand eczema: prevalence proportion ratio (PPR) 3·46. The PPR for hand eczema among individuals smoking > 15 cigarettes per day was 1·25 and 1·40 in uni‐ and multivariate analysis, respectively. Age, history of atopy, sex and water exposure were found to be confounders but not effect modifiers. A dose‐response relation between level of smoking and 1‐year prevalence of hand eczema was revealed with a PPR of 1·05 (P < 0·001) for the continuous variable of smoking habits, indicating a significantly increased prevalence of hand eczema among individuals with higher consumption of tobacco. Conclusions An association between heavy smoking and hand eczema was confirmed. It is important to consider the level of exposure, as a dose‐response relation was revealed, and to be aware of confounding factors.     

Filaggrin null mutations increase the risk and persistence of hand eczema in subjects with atopic dermatitis: results from a general population study

Summary Background Hand eczema is prevalent in the general population. It remains unclear whether or not filaggrin gene (FLG) null mutations increase the overall risk of hand eczema or only increase the risk of hand eczema in subjects with atopic dermatitis. Objectives To investigate the association between FLG null mutations and hand eczema. Methods A random sample of 3335 adults from the general population in Denmark was patch tested, FLG genotyped for R501X and 2282del4 null mutations and questioned about hand eczema. Results Participants with combined presence of atopic dermatitis and FLG null mutation status had a significantly higher prevalence of hand eczema, an earlier onset of hand eczema and a higher persistence of hand eczema compared with subjects with normal FLG status and absence of atopic dermatitis. Logistic regression analyses revealed positive associations between hand eczema within the past 12 months and FLG null mutation status in participants with a history of atopic dermatitis [odds ratio (OR) 2·98; 95% confidence interval (CI) 1·27–7·01], but not in subjects without atopic dermatitis (OR 0·82; 95% CI 0·41–1·67). Conclusions FLG null mutations were significantly associated with hand eczema (< 12 months) in subjects with atopic dermatitis. Combined atopic dermatitis and filaggrin null mutation status was strongly associated with early onset of hand eczema and hand eczema persistence.     

A randomized controlled trial in children with eczema: nurse practitioner vs. dermatologist

Background We hypothesized that a nurse practitioner would improve the quality of life of a child with eczema more than a dermatologist because of a structured intervention and more consultation time. Objectives To compare the level of care by nurse practitioners with that by dermatologists in children with eczema. Methods New referrals aged ≤ 16 years with a diagnosis of eczema were recruited. In a randomized, parallel‐group study with a follow‐up period of 1 year, 160 participants were randomized either to conventional care from a dermatologist or to care from a nurse practitioner. The primary outcome measure was change in quality of life at 12 months, as assessed by the Infants’ Dermatitis Quality of Life Index (IDQOL) for children aged ≤ 4 years, and by the illustrated version of the Children’s Dermatology Life Quality Index (CDLQI) for children aged 4–16 years. Secondary outcomes were changes in IDQOL and CDLQI at 4 and 8 months, family impact of childhood atopic dermatitis (Dermatitis Family Impact Questionnaire, DFI), eczema severity (objective SCORAD) and patient satisfaction (Client Satisfaction Questionnaire‐8, CSQ‐8) at 4, 8 and 12 months. Results The mean IDQOL in the dermatologist group improved significantly from 11·6 [SD 8·1; 95% confidence interval (CI) 9·0–14·2] at the baseline to 5·6 (SD 3·9; 95% CI 4·3–7·0) at 12 months with a mean change from the baseline of ?6·5 (SD 6·6; 95% CI ?14·2 to ?8·9; P < 0·001). The mean IDQOL in the nurse practitioner group improved significantly from 10·7 (SD 4·9; 95% CI 9·1–12·3) at baseline to 5·7 (SD 5·4; 95% CI 4·0–7·5) at 12 months with a mean change from the baseline of ?4·9 (SD 5·5; 95% CI ?6·8 to ?3·0; P < 0·001). The between‐groups difference was (?)1·7 (95% CI ?4·6 to 1·2; P = 0·26). The mean CDLQI in the dermatologist group improved significantly from 12·1 (SD 6·3; 95% CI 9·9–14·2) at baseline to 5·6 (SD 4·2; 95% CI 4·2–7·1) at 12 months with a mean change from the baseline of ?5·9 (SD 6·0; 95% CI ?8·0 to ?3·9; P < 0·001). The mean CDLQI in the nurse practitioner group improved significantly from 10·0 (SD 4·4; 95% CI 8·5–11·4) at the baseline to 4·9 (SD 3·5; 95% CI 3·7–6·1) at 12 months with a mean change from the baseline of ?5·2 (SD 4·0; 95% CI ?6·6 to ?3·8; P < 0·001). The between‐groups difference was (?)0·7 (95% CI ?3·3 to 1·7; P = 0·55). The between‐groups comparison was not significant for the IDQOL and the CDLQI at baseline or 4, 8 and 12 months. Both treatment groups showed significant improvement in DFI and objective SCORAD at 12 months. The between‐groups comparison was not significant at baseline or 4, 8 and 12 months. Significantly higher satisfaction levels were observed at 4, 8 and 12 months in the nurse practitioner group. Conclusions The level of care provided by a nurse practitioner in terms of the improvement in the eczema severity and the quality of life outcomes was comparable with that provided by a dermatologist. In addition, the parents were more satisfied with the care that was provided by a nurse practitioner.     

Filaggrin loss-of-function mutation R501X and 2282del4 carrier status is associated with fissured skin on the hands: results from a cross-sectional population study

Background Filaggrin metabolites act as osmolytes and are important for skin hydration. Carriers of filaggrin loss‐of‐function mutations have a higher prevalence of atopic dermatitis and dry skin. There is also evidence to suggest that filaggrin mutations increase the risk of hand eczema in atopic individuals. In our clinic, we have observed a distinct phenotype of hand eczema in patients with filaggrin mutation carrier status, characterized by fissured dermatitis on the dorsal aspect of the hands and with only sparse involvement of the palms including fine scaling. Objectives To investigate whether filaggrin loss‐of‐function mutations are associated with skin fissures on the hands and/or fingers in the general population. Methods Participants in a population‐based study were questioned about skin symptoms, genotyped for filaggrin mutation, patch tested for nickel allergy and skin prick tested. Results In an adjusted logistic regression analysis, filaggrin mutation status was significantly associated with fissured skin on the hands and/or fingers in adults (odds ratio 1·93, 95% confidence interval 1·05–3·55) and showed a nearly significant negative interaction with atopic dermatitis (P = 0·055), suggesting that the effect was predominantly in subjects without atopic dermatitis. Conclusions Filaggrin loss‐of‐function mutations seem not only to increase the risk of atopic dermatitis and dry skin but also the risk of fissures on the hands and/or fingers in subjects without atopic dermatitis. Prophylactic emollient therapy should be particularly encouraged in filaggrin loss‐of‐function mutation carriers.     

Delay in medical attention to hand eczema: a follow‐up study

Background Hand eczema often runs a chronic course but early medical intervention may be assumed to improve the prognosis. Objectives To follow patients with hand eczema for 6 months after seeing a dermatologist to investigate if delay in medical attention would impair the prognosis. Methods Study participants were 333 patients with hand eczema from nine dermatological clinics in Denmark. Severity of hand eczema was assessed by the patients at baseline and at the 6‐month follow up using a self‐administered photographic guide. Additional information was obtained by self‐administered questionnaires. Results Median patient delay (defined as the period from onset of symptoms until seeing a general practitioner) was 3 months [interquartile range (IQR) 1·5–8·0]. The median healthcare delay (defined as the period from the first visit to a general practitioner until seeing a dermatologist) was 3 months (IQR 1–8). In a logistic regression model, the odds ratio of a poor prognosis increased by a factor of 1·11 [95% confidence interval (CI) 1·02–1·21] per month of patient delay and by 1·05 (95% CI 1·00–1·10) per month of healthcare delay. Conclusions A poorer prognosis of hand eczema was associated with longer delay before medical attention.     

Lack of evidence for a protective effect of prolonged breastfeeding on childhood eczema: lessons from the International Study of Asthma and Allergies in Childhood (ISAAC) Phase Two

Summary Background Exclusive breastfeeding for at least 4 months is recommended by many governments and allergy organizations to prevent allergic disease. Objectives To investigate whether exclusive breastfeeding protects against childhood eczema. Methods Study subjects comprised 51 119 randomly selected 8‐ to 12‐year‐old schoolchildren in 21 countries. Information on eczema and breastfeeding was gathered by parental questionnaire. Children were also examined for flexural eczema and underwent skin prick testing. Odds ratios (ORs) were calculated for each study centre and then pooled across populations. Results There was a small increase in the risk of reported ‘eczema ever’ in association with ‘breastfeeding ever’ and breastfeeding < 6 months [pooled adjusted OR 1·11, 95% confidence interval (CI) 1·00–1·22 and OR 1·10, 95% CI 1·02–1·20, respectively]. There was no significant association between reported ‘eczema ever’ and breastfeeding > 6 months (pooled adjusted OR 1·09, 95% CI 0·94–1·26). Risk estimates were very similar for exclusive breastfeeding < 2 months, 2–4 months and > 4 months and for eczema symptoms in the past 12 months and eczema on skin examination. As for more severe eczema, breastfeeding per se conveyed a risk reduction on sleep disturbed eczema (pooled adjusted OR 0·71, 95% CI 0·53–0·96), but this effect was lost where children had been exclusively breastfed for > 4 months (pooled adjusted OR 1·02, 95% CI 0·67–1·54). Allergic sensitization and a history of maternal allergic disease did not modify any of these findings. Conclusions Although there was a protective effect of ever having been breastfed on more severe disease, we found no evidence that exclusive breastfeeding for 4 months or longer protects against eczema. Our results are consistent with findings from a recent systematic review of prospective studies. The U.K. breastfeeding guidelines with regard to eczema should be reviewed. Intervention studies are now required to explore how and when solids should be introduced alongside breastfeeding to aid protection against eczema and other allergic diseases.     

Eczema and cancer risk: a critical appraisal and review of the literature

Aim Hwang et al. aimed to evaluate the risk of malignancy among individuals with eczema, allergic rhinitis (AR) and asthma, compared with the general Taiwanese population. Hypothesis People with atopic conditions, including eczema, have an altered risk of malignancy. Setting and design This was a prospective nationwide cohort study. The authors used the Taiwanese National Health Insurance Research Database (NHIRD) to compare the incidence of cancers among people with established allergic disease relative to the risk in the general population. Study exposure Exposure was the presence of one or more atopic conditions (eczema, AR or asthma). Data were extracted on 997 729 randomly selected people registered on the NHIRD at any time point between 1996 and 2008. Eczema was identified via ICD‐9‐CM codes with the diagnosis being made by a dermatologist, paediatrician or allergist. Follow‐up was until 2008, date of first cancer or death. Outcomes The outcome was a new diagnosis of malignancy, identified via catastrophic illness insurance certificates, again using ICD‐9‐CM diagnostic codes. Primary outcome measure Standardized incidence ratios (SIRs) for cancers overall and different types of malignancy among patients with eczema, AR or asthma were calculated against the expected number of cancer cases in the general population, adjusted for age and sex. Results The number of patients identified with eczema, AR and asthma was 34 263, 225 315 and 107 601, respectively. Overall cancer rates in patients with these conditions were not significantly different from those in the general population [SIR eczema = 0·97 (95% confidence interval 0·87–1·09), SIR AR = 1·02 (0·98–1·05) and SIR asthma = 1·01 (0·97–1·04)]. However, when the results for eczema were stratified by age, people aged between 20 and 39 years appeared to have a 56% increase in risk in relation to ‘any cancer’ [SIR = 1·56 (1·13–2·09)]. Looking at individual cancer types in patients with eczema, only the risk of brain cancer was significantly raised [SIR = 2·52 (1·15–4·79)]. Patients who had had all three allergic conditions had a reduced SIR for ‘cancers overall’ [SIR = 0·59 (0·37–0·88)]. This inverse association was less strong for those with eczema and asthma [SIR = 0·73 (0·55–0·97)] or asthma and AR [SIR = 0·79 (0·73–0·84)] and statistically only of borderline significance for those with eczema and AR [SIR = 0·85 (0·67–1·07)]. Conclusions Hwang et al. conclude that the relationship between allergic diseases and cancer risk is complex and site specific. The risk of malignancy was highest in all atopic conditions in the 20–39‐year age group. In patients with eczema, the incidence of brain cancer was higher than expected, which the authors note is at odds with previous studies. However, numbers were too small to allow stratification by histological subtypes. The authors warn against deriving conclusions for rarer cancers and that borderline SIRs must be interpreted with caution.     

Scoring of hand eczema: good agreement between patients and dermatological staff

Background Assessment of hand eczema in a clinical study has been achieved using a scoring system which documents extent of eczema on different areas of the hand. Objectives To investigate whether the same scoring system could be used by patients to communicate current status of hand eczema. Methods In a study of 62 patients (36 women and 26 men, age range 19–75 years), the patient’s own assessment was compared with the assessment by a dermatologist and a dermatological nurse. Standardized information was given to the patient and the form was filled in independently by the patient, the nurse and the dermatologist, during the patient’s visit to the clinic. Individual area scores were summed to a total score. Results The overall agreement was good, with an interclass correlation (ICC) of 0·61 between patient and dermatologist for the total score. The ICC between nurse and dermatologist was 0·78. Differences between observers were more pronounced for the more severe cases – those with higher numerical scores as assessed by the dermatologist. There was a tendency for women and for patients over the median age of 44 years to set a lower point score than the dermatologist. The concordance of observations from individual anatomical areas was higher for fingertips and nails and lower for the palm and dorsum of the hand. Conclusions Patients are able to report the extent of hand eczema with good accuracy. Self‐assessment protocols for hand eczema may well have a place in the monitoring of hand eczema extent over time.     

P54Prevalence of skin changes in the cleaning industry

Background: In the cleaning industry, the hands are exposed to water and irritants, resulting in dry skin and hand eczema. The prevalence and severity of skin changes is unknown. Objectives: To quantify the prevalence and the severity of skin changes of the hands. To compare questionnaire‐based self‐reported signs of hand eczema (both current and at any occasion during the last 12 months), with skin changes revealed by clinical examination. Methods: A random sample of 231 employees in the cleaning industry participated in the study. Most of them were immigrants. They had to answer a (translated) questionnaire about signs of hand eczema. Then all of them were examined and the severity of hand eczema was graded by a scoring system1. In the comparison only objective subvariables (desquamation, erythema, fissures, infiltration, vesicles) were used. Results: Clinical examination of the hands detected desquamation in 38%; erythema in 29%; fissures in 24%; infiltration in 12%; vesicles in 4%. Severity scoring of hand eczema: one point in 21%; two points in 18%; three points in 9%; four points in 4%. Signs of hand eczema reported in the questionnaire based on the current situation: desquamation in 17%; erythema in 20%; fissures in 20%; infiltration in 10%; vesicles in 12%. Signs of hand eczema reported in the questionnaire based on any occasion during the last 12 months: desquamation in 18%; erythema in 17%; fissures in 22%; infiltration in 11%; vesicles in 15%. False negative self‐reporting by the questionnaire: desquamation in 26%; erythema in 18%; fissures in 14%; infiltration in 11%; vesicles in 3%. False positive self‐reporting by the questionnaire: desquamation in 5%; erythema in 10%; fissures in 10%; infiltration in 8%; vesicles in 11%. Conclusions: Desquamation and erythema were the most common signs both in clinical examination and in questionnaire. The self‐reported prevalence (both current and over the last 12 months) of erythema and desquamation is an underestimation of the true prevalence. Scoring hand eczema revealed that most of the employees scored one or two points; indicating that most of the clinical signs of hand eczema are minor. False negative self‐reporting by questionnaire was high; indicating that these minor symptoms of hand eczema were probably not recognized by the employees. False positive self‐reporting was also high; probably because they misunderstood the questions. This study illustrates the need for a consensus about the distinction between “minor skin damage” and “true eczema”.     

Filaggrin loss-of-function mutations are associated with early-onset eczema, eczema severity and transepidermal water loss at 3 months of age

Background Filaggrin loss‐of‐function (FLG) mutations are associated with eczema and skin barrier impairment, but it is unclear whether skin barrier impairment precedes phenotypic eczema in FLG mutation carriers. Objectives To study the association between FLG mutations, skin barrier impairment and clinical eczema at 3 months of age. Methods A total of 88 infants were examined for eczema. Disease severity was determined by the SCORAD eczema severity score. Transepidermal water loss (TEWL) was measured on unaffected forearm skin. Venous blood samples were screened for the four most common FLG mutations found in the U.K. white population (R501X, 2282del4, R2447X and S3247X). Median SCORAD and TEWL measurements in children with and without eczema and FLG mutations were compared. Results Thirty‐three per cent (29/88) of children had clinical eczema. Median SCORAD was 10·6 (range 3·5–31·0). TEWL (g m^?2 h^?1) was higher in children with eczema compared with unaffected infants (median TEWL 14·24 vs. 11·24, P < 0·001). Higher TEWL was associated with more severe disease (r = 0·59, P < 0·001, median TEWL, SCORAD < 15, 13·1 vs. 29·6, SCORAD ≥ 15, P = 0·029). Clinically dry skin was associated with higher TEWL, even in the absence of eczema (median TEWL 17·55 vs. 11·08, P = 0·008). Seventeen per cent (15/88) of children carried at least one FLG mutation. FLG mutation carriers were significantly more likely to have clinically dry skin, even in the absence of eczema [odds ratio (OR) 8·50, 95% confidence interval (CI) 1·09–66·58, P = 0·042]. FLG mutation carriers were also more likely to have eczema by 3 months of age (OR 4·26, 95% CI 1·34–13·57, P = 0·014). FLG mutations were significantly associated with higher median TEWL (all children, FLG‘yes’ 21·59 vs. FLG‘no’ 11·24, P < 0·001), even without clinical eczema (FLG‘yes’ 15·99 vs. FLG‘no’ 10·82, P = 0·01). Conclusions By the age of 3 months, FLG mutations are associated with an eczema phenotype, dry skin and TEWL. The observation that TEWL is elevated in unaffected FLG mutation carriers suggests that skin barrier impairment precedes clinical eczema.     

The effect of tobacco smoking and alcohol consumption on the prevalence of self‐reported hand eczema: a cross‐sectional population‐based study

Summary Background Hand eczema is a prevalent disorder that leads to high health care costs as well as a decreased quality of life. Important risk factors include atopic dermatitis, contact allergy and wet work whereas the role of null mutations in the filaggrin gene complex remains to be clarified. It has been debated whether life‐style factors such as tobacco smoking and alcohol consumption are associated with hand eczema. Objectives The current study aimed to investigate whether self‐reported hand eczema was associated with smoking and alcohol consumption in the general population. Methods Between June 2006 and May 2008, a cross‐sectional study was performed in the general population in Copenhagen, the capital of Denmark. A random sample of 7931 subjects aged 18–69 years old was invited to participate in a general health examination including a questionnaire; 3471 (44%) participated. Data were analysed with logistic regression analyses and associations were expressed as odds ratios (ORs) with 95% confidence intervals (CI). Results The prevalence of hand eczema was higher among previous smokers (OR = 1·13; CI = 0·90–1·40), current light smokers (OR = 1·51; CI = 1·14–2·02) and current heavy smokers (OR = 1·38; CI = 0·99–1·92) compared with never‐smokers. Conclusions Tobacco smoking was positively associated with hand eczema among adults from the general population in Denmark. Apparently, current light smokers (< 15 g daily) had a higher prevalence of hand eczema than current heavy smokers (> 15 g daily) but this needs to be reconfirmed. Alcohol consumption was not associated with hand eczema.     

Filaggrin haploinsufficiency is highly penetrant and is associated with increased severity of eczema: further delineation of the skin phenotype in a prospective epidemiological study of 792 school children

Background Null mutations within the filaggrin gene (FLG) cause ichthyosis vulgaris and are associated with atopic eczema. However, the dermatological features of filaggrin haploinsufficiency have not been clearly defined. Objectives This study investigated the genotype–phenotype association between detailed skin phenotype and FLG genotype data in a population‐based cohort of children. Methods Children (n = 792) aged 7–9 years were examined by a dermatologist. Features of ichthyosis vulgaris, atopic eczema and xerosis were recorded and eczema severity graded using the Three Item Severity score. Each child was genotyped for the six most prevalent FLG null mutations (R501X, 2282del4, R2447X, S3247X, 3702delG, 3673delC). Fisher’s exact test was used to compare genotype frequencies in phenotype groups; logistic regression analysis was used to estimate odds ratios and penetrance of the FLG null genotype and a permutation test performed to investigate eczema severity in different genotype groups. Results Ten children in this cohort had ichthyosis vulgaris, of whom five had mild–moderate eczema. The penetrance of FLG null mutations with respect to flexural eczema was 55·6% in individuals with two mutations, 16·3% in individuals with one mutation and 14·2% in wild‐type individuals. Summating skin features known to be associated with FLG null mutations (ichthyosis, keratosis pilaris, palmar hyperlinearity and flexural eczema) showed a penetrance of 100% in children with two FLG mutations, 87·8% in children with one FLG mutation and 46·5% in wild‐type individuals (P < 0·0001, Fisher exact test). FLG null mutations were associated with more severe eczema (P = 0·0042) but the mean difference was only 1–2 points in severity score. Three distinct patterns of palmar hyperlinearity were observed and these are reported for the first time. Conclusions Filaggrin haploinsufficiency appears to be highly penetrant when all relevant skin features are included in the analysis. FLG null mutations are associated with more severe eczema, but the effect size is small in a population setting.     

What causes flares of eczema in children?

Summary Background Although eczema affects 2–20% of children worldwide, there is little direct evidence on the role of environmental factors in disease flares. Objectives We sought to identify which environmental factors might worsen eczema. Methods Sixty children aged 0–15 years with eczema were studied intensively for up to 9 months. Daily electronic diaries and portable data loggers were used to record indoor exposures, and external meteorological data were obtained from a local monitoring centre. The primary outcome was a daily ‘bother’ score. Autoregressive moving average models were used to study the impact of exposures on eczema severity for individuals. Random effects modelling pooled estimated regression coefficients across participants. Results Increased severity was associated with nylon clothing [pooled regression coefficient 0·23, 95% confidence interval (CI) 0·03–0·43], dust (0·53, 0·23–0·83), unfamiliar pets (0·22, 0·10–0·34), sweating (0·24, 0·09–0·39) and shampoo (0·07, 0·01–0·14). The latter was enhanced in cold weather (0·30, 0·04–0·57). Body‐site specificity was observed for nylon clothing, (trunk P =0·02, limbs P = 0·03), wool clothing (trunk P = 0·03, but not limbs P = 0·62) and unfamiliar pets (hands P < 0·001). A combination of any three of seven likely variables was associated with disease worsening (pooled regression coefficient 0·41, 95% CI 0·20–0·63). Conclusions This exploratory study suggests that nylon clothing, dust, unfamiliar pets, sweating and shampoos may play a direct role in worsening eczema in children with eczema. Combinations of exposures acting in concert may also be important. Such knowledge may be useful to families with eczema and could lead to better strategies for preventing flares.     

Medical consultations in relation to severity of hand eczema in the general population

BACKGROUND: Hand eczema is a common disease with a wide severity spectrum. Little information exists concerning the association between the severity of hand eczema and medical consultations. OBJECTIVES: To describe the self-rated severity of hand eczema in a general population and the relationship to seeking medical attention. METHODS: A questionnaire on self-reported hypersensitivity including two questions on hand eczema was sent to a random sample of 6000 individuals, aged 18-69 years, living in Copenhagen, Denmark. A total of 4242 individuals (71%) answered the questionnaire. All individuals who reported hand eczema (n = 752) within the previous 12 months received a more detailed questionnaire focused on hand eczema and a previously validated photographic guide with four groups of severity ranging from almost clear to very severe. RESULTS: Five hundred and sixty-four individuals (75%) returned the second questionnaire. The 1-year period prevalence of hand eczema was estimated to be 14% in the population. Twenty-three per cent rated their hand eczema as moderate to very severe. In total, 67% had consulted their general practitioner and 44% had consulted a dermatologist because of hand eczema. Multivariate analysis showed a positive association (P < 0.05) between severity of hand eczema and medical consultations. Of those individuals (n = 102) who had not consulted a dermatologist 26% had experienced moderate to very severe hand eczema within the previous 12 months. CONCLUSIONS: A considerable proportion of individuals with moderate to very severe hand eczema in the general population miss out on the potential benefit of a dermatological examination, patch testing and a thorough-going exploration of environmental factors.     

Eczema severity in preadolescent children and its relation to sex,filaggrin mutations,asthma, rhinitis,aggravating factors and topical treatment: a report from the BAMSE birth cohort

Background Filaggrin (FLG) mutations are major genetic determinants for eczema, but their role in eczema severity needs further investigation. Children with eczema are at higher risk of having asthma and rhinitis but it is not known if this risk is associated with the severity of eczema. Objectives To investigate eczema severity in relation to sex, FLG mutations, asthma, rhinitis and topical treatment among preadolescent children in a population‐based cohort. Methods Parental questionnaires were used to obtain data on symptoms of eczema, asthma, and rhinitis among 3301 preadolescent children. Eczema severity was evaluated based on sleep disturbance, extent of disease and total time with eczema the previous year. Genotyping was performed in 1854 individuals for three common FLG mutations (R501X, R2447X and 2282del4). Results Eczema was more prevalent among girls (14·5%) than boys (9·4%). FLG mutations were detected in 13·1% of children with mild eczema and 12·5% with moderate‐to‐severe eczema. Of children with moderate‐to‐severe eczema, 45·1% had rhinitis and 22·0% had asthma compared with 32·7% and 13·8% of children with mild eczema, respectively. Children with moderate‐to‐severe eczema used moisturizers and topical glucocorticoids more frequently than children with mild eczema. Boys used moisturizers less frequently than girls. Conclusions More preadolescent girls than boys had eczema. FLG mutations did not influence eczema severity in our population‐based cohort. Prevalence of rhinitis and asthma was associated with eczema severity, with the highest prevalence among boys with moderate‐to‐severe eczema.     

Lifestyle factors and hand eczema in a Swedish adolescent population

Background: Hand eczema risk factors are potentially associated with lifestyle, and changes in lifestyle may influence the prevalence of this condition. Objectives: To report potential lifestyle risk factors and their association with hand eczema. Patients/Materials/Methods: Cross‐sectional questionnaire survey and standard patch test among Swedish upper secondary school children. The participation rate was 81% (6095/7543) for the questionnaire and 59% (4439/7543) for the test. Results: Girls reported piercing (84% versus 18%), tattooing (6% versus 3%), smoking (24% versus 16%) and vegetarianism (21% versus 7%) significantly more often than boys. Girls had significantly more hand eczema (7% versus 4%) than boys. Besides female sex (OR 2.0), allergic rhinitis (OR 1.8), flexural eczema (OR 4.5), and positive nickel test (OR 1.7) were significant risk factors in multivariate analysis. Piercing entailed a decreased risk (OR 0.6). Other lifestyle practices had no association with hand eczema. Vegetarian diet and dental braces which potentially increase oral nickel exposure were not associated with hand eczema prevalence in nickel sensitized individuals. Conclusions: The studied lifestyle practices were more prevalent in girls. Smoking, tattooing, and diet were not associated with the occurrence of hand eczema.     

Hand eczema in hairdressers: a Danish register-based study of the prevalence of hand eczema and its career consequences

Background. Occupational hand eczema is common in hairdressers, owing to wet work and hairdressing chemicals. Objectives. To estimate the prevalence of hand eczema and its career consequences among hairdressers in Denmark. Methods. A register‐based study was conducted, comprising all graduates from hairdressing vocational schools from 1985 to 2007 (n = 7840). The participants received a self‐administered postal questionnaire including questions on hand eczema, atopic dermatitis, and career change. A response rate of 67.9% (n = 5324) was obtained. Results. Of the respondents, 44.3% no longer worked as hairdressers and had worked for an average of 8.4 years in the profession before leaving it. Hand eczema was more common among ex‐hairdressers (48.4%) than among current hairdressers (37.6%) (p < 0.0001), and significantly more ex‐hairdressers (26.8%) than current hairdressers (15.7%) had chronic hand eczema (p < 0.0001). Of the respondents with hand eczema, 75% were aged 15–24 years at onset, and 45.5% gave hand eczema as a reason for career change. In this group, logistic regression analysis showed that chronic hand eczema contributed the most to the decision to change career (odds ratio 50.12; 95% confidence interval 18.3–137). Conclusions. Hairdressers work an average of 8.4 years in the profession before leaving it, and hand eczema contributes significantly to this career change.     

Prednisolone vs. ciclosporin for severe adult eczema. An investigator‐initiated double‐blind placebo‐controlled multicentre trial

Background Patients with severe eczema frequently receive systemic glucocorticosteroids. The efficacy of prednisolone and other steroids, however, has never been evaluated appropriately. A meta‐analysis indicated that ciclosporin is the best evaluated systemic treatment for eczema. Objectives To investigate the comparative efficacy of prednisolone and ciclosporin for severe eczema. Methods In an investigator‐initiated double‐blind randomized multicentre trial, adults with severe eczema (objective SCORAD ≥ 40 and Dermatology Life Quality Index ≥ 10) were randomly allocated to receive prednisolone (initial dose 0·5–0·8 mg kg^?1 daily) for 2 weeks followed by placebo for 4 weeks or ciclosporin (2·7–4·0 mg kg^?1 daily) for 6 weeks and followed for another 12 weeks. Concomitant treatment included a moderately potent topical steroid, emollients, and continuation of antihistamines. Primary endpoint was the proportion of patients with stable remission, i.e. ≥ 50% SCORAD improvement under active treatment and no flare (≥ 75% of baseline SCORAD) during follow‐up. Sample size calculation indicated that 66 patients were needed to see clinically relevant differences between groups. Analysis was by intention‐to‐treat (ClinicalTrials.gov Identifier: NCT00445081). Results Because of unexpectedly high numbers of withdrawals due to significant exacerbations of eczema (n = 15/38) an independent data monitoring and safety board proposed early study termination. Thirty‐eight patients were randomized and analysed. Stable remission was achieved in one of 21 patients receiving prednisolone compared with six of 17 patients treated with ciclosporin (P = 0·031). Conclusions Ciclosporin is significantly more efficacious than prednisolone for severe adult eczema. Despite its frequent use in daily practice, prednisolone is not recommended to induce stable remission of eczema.     

Experiences with the severity scoring of atopic dermatitis in a population of German pre-school children

Severity scoring of atopic dermatitis (SCORAD) was introduced as a standard tool but has not been used in a population-based epidemiological study; the objective of the present study was to determine the practicability of this instrument in this setting. We assessed the distribution of the severity of atopic eczema in the community and investigated differences between east and west Germany. A factor analysis was then carried out to characterize the variables of this scoring system and to analyse possible relationships within them. A multicentre cross-sectional study was carried out in five east German and two west German locations in 1994; pre-school children (5–6 years old) were investigated and cases of atopic eczema identified by a dermatological examination. The SCORAD was used to determine the severity of atopic eczema and the results assessed using analysis of variance and principal component analysis (varimax rotation). In all, 1511 (76·2%) of the children originally contacted participated and 11·3% were diagnosed with atopic eczema at the time of examination. The median severity score was 21·4 (interquartile range 13·5) and there was a tendency to higher scores in west Germany for the mean overall score, the intensity score and the extent. ‘Erythema’ (1·30 vs. 1·06; P= 0·006) and ‘excoriation’ (0·77 vs. 0·36; P= 0·002) were significantly more prominent in children with eczema from west Germany (adjusted for observer). Interobserver variabilities of the SCORAD parameters were calculated, adjusted for location and were in accordance with earlier findings. Principal component analysis identified three independent factors accounting for 54·1% of the total variance. A severity factor, characterized by ‘extent’, ‘lichenification’, ‘excoriation’ and ‘pruritus’, was separated from a factor with an acute eczema-type profile (‘erythema’, ‘oedema’, ‘oozing’) and a factor whose major characteristics were ‘extent’, ‘dryness’, and ‘sleep loss’. We conclude that atopic eczema is frequent in pre-school children. The SCORAD proved to be readily applicable and useful in epidemiological studies, but further validation is needed.