The validity of the Hospital Anxiety and Depression Scale. An updated literature review

OBJECTIVE: To review the literature of the validity of the Hospital Anxiety and Depression Scale (HADS). METHOD: A review of the 747 identified papers that used HADS was performed to address the following questions: (I) How are the factor structure, discriminant validity and the internal consistency of HADS? (II) How does HADS perform as a case finder for anxiety disorders and depression? (III) How does HADS agree with other self-rating instruments used to rate anxiety and depression? RESULTS: Most factor analyses demonstrated a two-factor solution in good accordance with the HADS subscales for Anxiety (HADS-A) and Depression (HADS-D), respectively. The correlations between the two subscales varied from.40 to.74 (mean.56). Cronbach's alpha for HADS-A varied from.68 to.93 (mean.83) and for HADS-D from.67 to.90 (mean.82). In most studies an optimal balance between sensitivity and specificity was achieved when caseness was defined by a score of 8 or above on both HADS-A and HADS-D. The sensitivity and specificity for both HADS-A and HADS-D of approximately 0.80 were very similar to the sensitivity and specificity achieved by the General Health Questionnaire (GHQ). Correlations between HADS and other commonly used questionnaires were in the range.49 to.83. CONCLUSIONS: HADS was found to perform well in assessing the symptom severity and caseness of anxiety disorders and depression in both somatic, psychiatric and primary care patients and in the general population.     

Screening for anxiety and depression after stroke: Comparison of the Hospital Anxiety and Depression Scale and the Montgomery and Åsberg Depression Rating Scale

Objective

Anxiety and depression after stroke are frequent, but are often overlooked and not assessed. The aims of the study were to (1) assess the prevalence of anxiety and depression and (2) compare the performance of the Hospital Anxiety and Depression Scale (HADS) and Montgomery and Åsberg Depression Rating Scale (MADRS) as screening instruments for anxiety and depression disorders 4 months after stroke.

Methods

Stroke patients, consecutively admitted to a stroke unit, were assessed with HADS and MADRS 4 months after stroke (n=104). Depression and anxiety disorders were diagnosed using the Structured Clinical Interview for DSM-IV (SCID). Measures were compared in terms of correlations, sensitivity, specificity, positive and negative predictive value, overall agreement, kappa, and ROC curves, using DSM-IV diagnoses of “at least one current significant anxiety disorder” (Anxiety) and “any current depression” (Depression), as the clinical criteria.

Results

Anxiety occurred in 23% of patients and Depression in 19% (13% major depression, 3% minor depression, 4% dysthymia). For Anxiety, the optimal screening cut-off was 4 for HADS-A and 6 for HADS-total; for Depression, optimal cut-offs were 4 for HADS-D, 11 for HADS-total, and 8 for MADRS. At cut-offs commonly used in clinical practice for depression screening (HADS-D: 8, MADRS: 12), the MADRS performed marginally better than the HADS.

Conclusion

Anxiety is as prevalent as depression 4 months after stroke. MADRS and HADS-D perform acceptably as screening instruments for depression, and HADS-A for anxiety after stroke. However, lower HADS cut-offs than recommended for the general population should be considered for stroke patients.     

Anxiety and depression in cancer patients: relation between the Hospital Anxiety and Depression Scale and the European Organization for Research and Treatment of Cancer Core Quality of Life Questionnaire

BACKGROUND: The emotional functioning (EF) dimension of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ C33) and the Hospital Anxiety and Depression Scale (HADS) evaluate anxiety and depression. We wanted to compare cancer patients' responses to EF with those to HADS, as well as the impact of anxiety and depression on the quality of life (QL) dimensions of the EORTC QLQ C33. METHOD: A total of 568 cancer patients completed both the EORTC QLQ C33 and HADS at the same occasion. The association between the patients' EF scorings and their HADS scores was analyzed by multiple linear regression. Gender and age were included as covariates. RESULTS: Statistically significant negative relations were found between EF and HADS-A (anxiety), HADS-D (depression) and HADS-T (total score), respectively, with the highest correlation coefficient for HADS-A. Older patients and males reported less emotional distress assessed by the EF scale than younger ones and females with comparable HADS-T or HADS-D scores. Both HADS-A and HADS-D were significantly related to other QL dimensions, and depression was a stronger predictor for reduced QL than anxiety. CONCLUSION: The EF dimension of EORTC QLQ C33 predominantly assesses anxiety, whereas depression is rated to a lesser degree. Combined with significant age and gender relations, this implies a risk of underdiagnosed depression, if the EORTC QLQ C33 is used as the only instrument to screen for psychological distress in cancer patients. As depression has a stronger impact on global QL of cancer patients than anxiety, the use of an additional instrument is recommended for assessment of depression.     

持续性躯体形式疼痛障碍生命质量的相关因素研究

目的探讨持续性躯体形式疼痛障碍（persist somatoform pain disorder,PSPD）患者的生命质量及相关因素。方法采用横断面调查研究,对60例PSPD患者应用健康状况调查问卷（SF-36）评定其生命质量,医疗结局研究用疼痛量表（MOSPM）评定PSPD严重程度,汉密顿抑郁量表（HAMD17）,汉密顿焦虑量表（HAMA）评定伴随的情绪状态。结果（1）除精神健康和精力分量表外,SF-36各分量表评分均显著低于普通居民（P〈0．01）;（2）除一般健康状况分量表外,SF-36各分量表评分与MOSPM总分及各因子分均显著负相关,与HAMD17及HAMA总分显著负相关;（3）除一般健康状况分量表外,有抑郁组的SF-36各分量表、躯体健康总评（PCS）及精神健康总评（MCS）分均显著低于无抑郁组（P〈0．01）;（4）多元逐步回归结果,SF-36的PCS与年龄和MOSPM总分相关,MCS则与HAMD总分和MOSPM总分相关。结论PSPD患者的生命质量显著低于普通人群,疼痛症状、抑郁和焦虑情绪与患者的生命质量密切相关,年龄、疼痛、抑郁为PCS和MCS重要影响因素。     

Screening for anxiety and depression in dialysis patients: comparison of the Hospital Anxiety and Depression Scale and the Beck Depression Inventory

ObjectiveAlthough anxiety and depression are frequent comorbid disorders in dialysis patients, they remain underrecognized and often untreated. The aim of the study was to evaluate the Hospital Anxiety and Depression Scale (HADS), the Beck Depression Inventory (BDI) and a truncated version of the BDI, the Cognitive Depression Index (CDI), as screening tools for anxiety and depression in dialysis patients.MethodsA total of 109 participants (69.7% males), from four dialysis centers, completed the self-report symptom scales HADS and BDI. Depression and anxiety disorders were diagnosed with the Structured Clinical Interview for DSM-IV Axis I disorders (SCID-I). The sensitivity, specificity, positive and negative predictive value, overall agreement, kappa and receiver operating characteristic (ROC) curves were assessed.ResultsDepressive disorders were found in 22% of the patients based on the SCID-I, while anxiety disorders occurred in 17%. The optimal screening cut-off score for depression was ≥7 for the HADS depression subscale (HADS-D), ≥14 for the HADS-total, ≥11 for the CDI and ≥17 for the BDI. The optimal screening cut-off for anxiety was ≥6 for the HADS anxiety subscale (HADS-A) and ≥14 for the HADS-total. At cut-offs commonly used in clinical practice for depression screening (HADS-D: 8; BDI: 16), the BDI performed slightly better than HADS-D.ConclusionThe BDI, CDI and HADS demonstrated acceptable performance as screening tools for depression, as did the HADS-A for anxiety, in our sample of dialysis patients. The recommended cut-off scores for each instrument were: ≥17 for BDI, ≥11 for CDI, ≥7 for HADS depression subscale, ≥6 for HADS anxiety subscale and ≥14 for HADS total. The CDI did not perform better than the BDI in our study. Lower cut-off for the HADS-A than recommended in medically ill patients may be considered when screening for anxiety in dialysis patients.     

Screening for depression and anxiety disorders in primary care patients

Mood and anxiety disorders are highly prevalent in primary health care. In this study we assessed performance of the Hospital Anxiety and Depression Scale (HADS) for screening of depression and anxiety disorders in a population of primary care patients. A total of 503 primary care patients consecutively admitted to the primary care medical center in Kaunas, Lithuania, completed the study. We found that the HADS subscale of depression (HADS-D) at a cutoff score of 6 or more showed the best performance screening for a major depressive episode diagnosed by means of the Mini International Neuropsychiatric Interview (MINI), with a sensitivity of 80%, specificity of 69%, positive predictive value of 80%, negative predictive value of 92%, and area under the receiver operating characteristic (ROC) curve of 0.75. Performance of the HADS-D against MINI diagnosis of dysthymia was weak. The HADS subscale of anxiety (HADS-A) at a cutoff score of 9 or more showed the best performance screening for MINI diagnosis of overall anxiety disorders, with a sensitivity of 77%, specificity of 75%, positive predictive value of 53%, negative predictive value of 90%, and area under the ROC curve of 0.76. These results suggest that in primary care patients HADS is an adequate screening instrument for the MINI diagnoses of major depressive episode, but not for dysthymia at a cutoff score of 6, and for anxiety disorders at a cutoff score of 9.     

Reliability and validity of a Chinese version of the HADS for screening depression and anxiety in psycho-cardiological outpatients

Aim

The Hospital Anxiety and Depression Scale (HADS) has been used widely with cardiovascular patients. This study aims to examine the reliability and validity of a Chinese version of HADS among psycho-cardiological outpatients.

Methods

One hundred psycho-cardiological outpatients were asked to complete the Chinese version of HADS and were then interviewed according to the Mini International Neuropsychiatric Interview, Version 5 (MINI).

Results

According to the MINI, 38 outpatients were diagnosed with major depression and 15 outpatients were diagnosed with an anxiety disorder. Compared with the MINI diagnoses, the optimum cutoff value of the anxiety subscale (HADS-A) was six (6) with a sensitivity of 81.6%, specificity of 75.8%, positive predictive value (PPV) of 54.0% and negative predictive value (NPV) of 91.9%; at the optimum cutoff value of nine (9), the depression subscale (HADS-D) had a sensitivity of 80.0%, specificity of 92.9%, PPV of 52.2% and NPV of 96.1%. The Cronbach's alpha coefficients of the HADS-A and HADS-D subscales were 0.753 and 0.764, respectively. The areas under the ROC curves of the HADS-A and the HADS-D subscales, as compared to MINI diagnoses of anxiety and depression, were 0.81 (SE = 0.05, 95%CI: [0.73, 0.90]) and 0.86 (SE = 0.05, 95%CI: [0.77, 0.94]), respectively.

Conclusions

The HADS was found to be a reliable measurement tool for excluding depression and anxiety in psycho-cardiological outpatients.     

Are men more depressed than women in Norway? Validity of the Hospital Anxiety and Depression Scale

OBJECTIVE AND METHODS: The aim was to evaluate the depression subscale of the Hospital Anxiety and Depression Scale (HADS-D) by comparing the gender-specific scores with another self-rated measure of mental health (MH), the SF-12 Health Survey, in a large general population (N=16,116). RESULTS: Using a score of 8 as a cut-off point for depression, the odds ratio for depression among men versus women was 1.29 [P<.0001; 95% confidence interval (CI): 1.16-1.43]. This contrasted with the results from the SF-12, in which the women had markedly and significantly poorer scores than men did. The women also reported a higher use of medicine for depression. Two of the seven HADS-D questions, related to interest in personal appearance and the ability to enjoy television, radio, and books, explained 70% of the higher depression scores among men. CONCLUSION: The results suggest that the validity related to gender differences in HADS-D is highly questionable.     

Determinants of quality of life in the acute stage following stroke

Objective

This study aimed to investigate the factors influence the quality of life (QOL) of survivors of an acute stroke.

Methods

For 422 stroke patients, assessments were made within two weeks of the index event. QOL was measured using the World Health Organization Quality of Life-Abbreviated form (WHOQOL-BREF), which has four domains related to physical factors, psychological factors, social relationships, and environmental context. Associations of each four WHOQOL-BREF domain score with socio-demographic characteristics (age, sex, education, marital status, religion, and occupation), stroke severity (National Institutes of Health Stroke Scale), physical disability (Barthel Index), cognitive function (Mini-Mental Status Examination: MMSE), grip strength, and psychological distress (Hospital Anxiety and Depression Scale depression and anxiety subscale: HADS-D and HADS-A) were investigated using the linear regression models.

Results

Higher physical domain scores were independently associated with higher MMSE scores, stronger hand-grip strength, and lower HADS-D and HADS-A scores; higher psychological domain scores were independently associated with higher educational level, higher MMSE scores, and lower HADS-D and HADS-A scores; higher social relationships domain scores were independently associated with lower HADS-D and HADS-A scores; and higher environmental domain scores were independently associated with higher educational level, higher MMSE scores, and lower HADS-D scores.

Conclusion

Psychological distress and impaired cognitive function were independently associated with lower QOL in patients with acute stroke. However, stroke severity, physical disability and other socio-demographic factors were less significantly associated with QOL. These findings underscore the importance of psychological interventions for improving QOL during the acute phase following stroke.     

Anxiety and depression and their influence on the quality of life after total hip replacement: preliminary report

Objective. The study investigated health-related quality of life in relation to mental status (anxiety and depression) and demographic factors in patients before and after total hip replacement due to osteoarthrosis. Methods. The SF-36, HADS, socio-demographic data questionnaire was delivered to a group of 184 subjects (108 females, 76 males) at the mean age at the time of surgery of 59 years. Questionnaires were delivered to the subjects 2 weeks before the surgery and 6 months after the operation (by mail). Results. Patients after hip replacement showed significant improvement in health-related quality of life in most domains of SF-36 score and summary scale of PCS (Physical Component Summary Scale) and MCS (Mental Component Summary Scale). They also showed improvement in mental status. Elderly patients were more likely to show worse score in MCS and PCS before and after surgery. BMI (body mass index) was correlated only with preoperative PCS. Mental status was associated with postoperative PCS and MCS. Patients who were satisfied with the results of the surgery showed higher PCS and MCS score. Conclusion. Hip replacement surgery brings significant improvement to the quality of life. Age and mental status of those patients influence markedly their postoperative performance.     

Health-related quality of life and emotional well-being in parents of children with epilepsy referred for presurgical evaluation in Sweden

PurposeThe purpose of this study was to assess and compare health-related quality of life (HRQoL) and emotional well-being in mothers and fathers of children with drug-resistant epilepsy, referred for presurgical evaluation in Sweden.MethodsMothers (n = 117) and fathers (n = 102) of 122 children (0–18 years) completed the generic 36-item Short Form Health Survey (SF-36) and the Hospital Anxiety and Depression Scale (HADS). Mothers' and fathers' SF-36 scores were compared with age-adjusted Swedish population values using the independent t-tests. Differences in the proportions of mothers vs. fathers classified as ‘noncases’ or ‘possible/probable’ clinical cases of anxiety (HADS-A) and depression (HADS-D), respectively, were assessed with the chi-square test. Parents' HADS scores were also compared using independent t-tests.ResultsMothers had significantly lower scores compared with norms on 6 of the 8 SF-36 domains (p < 0.01), while fathers had significantly lower scores on 4 of the domains (p < 0.01). Mothers had significantly lower scores than fathers on 4 of the SF-36 domains (p < 0.05). Significantly more mothers than fathers scored below the population mean for the SF-36 Mental Component Summary score. A significantly larger proportion of mothers than fathers had ‘possible/probable’ anxiety (52% vs. 38%) but not depression (30% vs. 22%). Mothers had significantly worse scores than fathers on HADS-A (p < 0.01) but not on HADS-D.ConclusionMothers and fathers of children with drug-resistant epilepsy have diminished HRQoL compared with population norms. Symptoms of anxiety appear to be more common than symptoms of depression. Mothers experienced higher levels of anxiety, but not depression, than fathers and scored lower than fathers on vitality, mental health, and Mental Component Summary of the SF-36. There is a need to identify contributory factors and interventions to ameliorate these difficulties.     

Association of subjective anxiety, depression, and sleep disturbance with quality-of-life ratings in adults with epilepsy

Purpose :  To determine the relative contributions of subjective anxiety, depression, sleep disturbance, and seizure-related variables to quality-of-life scores in adults with epilepsy, and the interrelationships among these factors.
Methods :  Consecutive adult patients with epilepsy attending neurology outpatient clinics were recruited. Patients completed the following scales: Hospital Anxiety and Depression Scale (HADS), Hamilton Anxiety Rating Scale, Medical Outcomes Study (MOS) Sleep Scale, Epworth Sleepiness Scale, and Quality of Life in Epilepsy Inventory-31 (QOLIE-31). Univariate and multivariate linear regression models were used to identify variables associated with QOLIE-31 overall score. Path analysis model was constructed to test for interrelations between the variables.
Results :  Two hundred forty-seven patients completed the questionnaires. By multivariate analysis, in order of degree of contribution, HADS anxiety subscale score, MOS Sleep Scale Sleep Problems Index score, HADS depression subscale score, number of current antiepileptic drugs used, and seizure freedom in the past 4 weeks, significantly correlated with QOLIE-31 overall score, accounting for 65.2% of the variance. Complex interrelationships were present between these factors. A general linear model to predict QOLIE-31 overall score in the presence of these factors was constructed.
Conclusion :  Subjective anxiety, depression, and sleep disturbance exerted greater effect than short-term seizure control on quality of life scores of patients with epilepsy. These factors should be considered simultaneously when evaluating effects of treatment on quality of life.     

A psychometric evaluation of the Hospital Anxiety and Depression Scale for the medically hospitalized elderly

Background: Few psychometric studies of the Hospital Anxiety and Depression Scale (HADS) scale have been performed with clinical samples of elderly individuals. Methods: The participants were 484 elderly (65–101 years, 241 men) patients in an acute medical unit. The HADS, the Montgomery–Aasberg Depression Rating Scale (MADRS) and questionnaires assessing quality of life, functional impairment, and cognitive function were used. The psychometric evaluation of the HADS included the following analyses: 1) the internal construct validity by means of principal component analysis followed by an oblique rotation and corrected item–total correlation; 2) the internal consistency reliability by means of the alpha coefficient (Cronbach's) and 3) concurrent validity by means of Spearman's rho. Results: We found a two-factor solution explaining 45% of the variance. Six of seven items loaded adequately (≥0.40) on the HADS-A subscale (item 7 did not) and five of seven items loaded adequately on the HADS-D subscale (items 8 and 10 did not). Cronbach's alpha for the HADS-A and HADS-D subscale was 0.78 and 0.71, respectively. The correlation between HADS-D and the MADRS, a measure of the concurrent validity, was 0.51. Conclusion: The HADS appears to differentiate well between depression and anxiety. The internal consistency of the HADS in a sample of elderly persons was as satisfactory as it is in samples with younger persons. In contrast to younger samples, item 8 (“I feel as if I have slowed down”) did not load adequately on the HADS-D subscale. This may be attributed to the way elderly people experience and describe their symptoms.     

Plasma phosphatidylcholine and sphingomyelin concentrations are associated with depression and anxiety symptoms in a Dutch family-based lipidomics study

The central nervous system has the second highest concentration of lipids after adipose tissue. Alterations in neural membrane phospho- and sphingolipid composition can influence crucial intra- and intercellular signalling and alter the membrane's properties. Recently, the polyunsaturated fatty acids (PUFA) hypothesis for depression suggests that phospho- and sphingolipid metabolism includes potential pathways for the disease. In 742 people from a Dutch family-based study, we assessed the relationships between 148 different plasma phospho- and sphingolipid species and depression/anxiety symptoms as measured by the Hospital Anxiety and Depression Scales (HADS-A and HADS-D) and the Centre for Epidemiological Studies Depression Scale (CES-D). We observed significant differences in plasma sphingomyelins (SPM), particularly the SPM 23:1/SPM 16:0 ratio, which was inversely correlated with depressive symptom scores. We observed a similar trend for plasma phosphatidylcholines (PC), particularly the molar proportion of PC O 36:4 and its ratio to ceramide CER 20:0. Absolute levels of PC O 36:4 were also associated with depression symptoms in an independent replication. To our knowledge this is the first study on depressive symptoms that focuses on specific phospho- and sphingolipid molecules in plasma rather than total PUFA concentrations. The findings of this lipidomic study suggests that plasma sphingomyelins and ether phospholipids should be further studied for their potential as biomarkers and for a better understanding of the underlying mechanisms of this systemic disease.     

108例肝硬化患者情绪、家庭负担与生活质量的相关性

目的探讨肝硬化患者的情绪、社会支持、家庭负担与生活质量的相关性。方法通过整群抽样方法选取兰州市某三甲医院108例肝硬化患者,采用一般情况调查表、医院焦虑抑郁量表(HADS)、社会支持评定量表(SSRS)、诺丁汉健康量表(NHP)和疾病家庭负担量表(FBS)进行评定。结果 HADS-A评分≥9分者107例(99.1%),HADS-D评分≥9分95例(88.0%)。年龄50岁、50≤年龄≤60岁、年龄60岁的三组患者在疼痛(P=0.010)、活动(P=0.002)、NHP总评分(P=0.024)方面差异均有统计学意义;NHP中除睡眠以外的5个维度和总评分与HADS-A、HADS-D、HADS总评分呈正相关(P0.05或0.01),NHP的精力、情感和总评分与FBS各维度评分及总评分呈正相关(P0.05或0.01);FBS总评分、抑郁、家庭经济负担和年龄对预测NHP总评分作用显著。结论 FBS总评分、抑郁、家庭经济负担、年龄对肝硬化患者的生活质量影响明显。     

Anxiety and depression in primary care patients: predictors of symptom severity and developmental correlates

OBJECTIVE: A study in a German general practice used the Hospital Anxiety and Depression Scale (HADS) to determine the prevalence of anxiety and depression in 242 consecutive patients. The study had two additional goals: (1) to identify indicators of symptom severity and (2) to validate the HADS by relating it to measures of developmental psychopathology. METHODS: In addition to the HADS, clinical/sociodemographic data were collected. Patients filled up additional questionnaires measuring attachment characteristics, recalled parental rearing behavior, resilience, adverse childhood experiences, and physical complaints. RESULTS: Using HADS cutoff scores of > or =11 in total, we found that 21.1% of the patients showed clinically relevant anxiety levels; the rate for depression was 12.0%, that for anxiety or depression was 26.1%, and that for anxiety and depression combined was 7%. With the exception of psychiatric disorders, the HADS did not differentiate between subgroups with different somatic diseases. HADS scores were shown to be predicted by the patients' sex, family status, number of consultations, and subjective physical complaints. Patients with higher HADS scores also indicated lower resilience, more insecure attachment, and negative recalled parental rearing behavior. Resilience, attachment security, and specific parental behavior (control/warmth) independently predicted anxiety, depression, and physical complaints. CONCLUSION: This study provides further support for the usefulness of the HADS as a measure for routine screening for anxiety and depression and its relationship with constructs from developmental psychopathology. We recommend the use of the HADS in combination with potential indicators of symptom severity (fatigue, cardiovascular symptoms, high number of consultations) to identify patients needing psychosocial support.     

Coping, affective distress, and psychosocial adjustment among people with traumatic upper limb amputations

OBJECTIVE: This study investigated the prevalence of symptoms of depression and anxiety in a sample of predominantly elderly males with acquired upper limb amputations (n=138) and examined the contribution of coping strategies to the prediction of psychosocial adjustment. METHOD: One hundred and thirty-eight men with injury-related upper limb amputations completed self-report questionnaires assessing coping strategies, symptoms of anxiety and depression, and psychosocial adaptation to prosthesis use. RESULTS: Prevalence of significant depressive symptoms was 28.3% [Hospital Anxiety and Depression Scale, Depression subscale (HADS-D) score > or =8]. Prevalence of significant anxiety symptoms was 35.5% [HADS Anxiety subscale (HADS-A) score > or =8]. Coping styles emerged as important predictors of psychosocial adaptation. In particular, avoidance was strongly associated with psychological distress and poor adjustment. CONCLUSIONS: These findings suggest the potential benefits of interventions to reduce reliance on avoidant coping and stimulate more problem-focused approaches to coping with difficulties and challenges in order to facilitate adaptation and prevent problems in psychosocial functioning postamputation.     

Examining item bias in the anxiety subscale of the Hospital Anxiety and Depression Scale in patients with chronic obstructive pulmonary disease

The Hospital Anxiety and Depression Scale (HADS) is a widely used screening instrument for depression and anxiety in medically compromised patients. The purpose of this study was to examine the differential item functioning (DIF) of the anxiety subscale of the HADA (HADS-A). A research assistant administered the HADS-A to 166 Chinese patients with chronic obstructive pulmonary disease (COPD) who were consecutively admitted to a rehabilitation hospital. Although the HADS-A was overall uni-dimensional, there were one mute item and two items with borderline misfit. Only one item had a DIF for arterial oxygen saturation. No item had DIF for other indicators of the severity of COPD. In conclusion, this study found that for one item the HADS-A has significant item bias for the severity of disease in patients with COPD.     

The associations of anxiety, depression and personal illness representations with glycaemic control and health-related quality of life in patients with type 2 diabetes mellitus

OBJECTIVE: This study examined the interrelationships of anxiety, depression and personal illness representations with glycaemic control and health-related quality of life in adults with Type 2 diabetes. METHODS: One hundred eighty-four consecutive patients with Type 2 diabetes mellitus completed the Illness Perception Questionnaire (IPQ), the Well-Being Scale (WBQ) and the Short Form 36 Health Survey Questionnaire (SF-36). Demographic characteristics, details of diabetes status (duration of diabetes, treatments and complications) and glycosylated haemoglobin (HbA1c) were recorded. RESULTS: Depression was correlated with greater perceived symptom load (r = .48, P < .01), worse anticipated consequences (r = -.41, P < .01) and perceived lack of control of diabetes (r = .28, P < .01). After controlling for demographic and illness characteristics, personal illness representations relating to symptom load and anticipated consequences were independently associated with the SF-36 physical functioning score, contributing an additional 15% to the variance. WBQ depression and anxiety scores, along with IPQ control and consequences, were independently associated with SF-36 mental function score, contributing a further 51% to the variance after controlling for demographic and illness details. Neither IPQ nor WBQ scales were associated with HbA1c after controlling for demographic and medical illness details. CONCLUSION: Anxiety, depression and negative beliefs about illness influence physical and mental functioning, but not metabolic control in patients with diabetes.     

Anxiety and depression influence the relation between disability status and quality of life in multiple sclerosis

Disability status, depression and anxiety are important determinants of quality of life (QoL) in patients with multiple sclerosis (MS). We investigated whether anxiety and depression influence the relation between disability status and QoL in our cohort of recently diagnosed patients. Disability status [Expanded Disability Status Scale (EDSS)], anxiety and depression [Hospital Anxiety and Depression Scale (HADS)], and QoL (SF-36) were prospectively obtained in 101 MS patients. The relation between EDSS and SF-36 scales was examined using regression analyses, without and with adjustment for anxiety and depression. Interaction effects were investigated by comparing the relation between EDSS and QoL in patients with high and low anxiety and depression. In the unadjusted analyses, EDSS was significantly related to all SF-36 physical and mental health scales. After adjustment for anxiety and depression, EDSS was significantly related only to the SF-36 physical functioning, role-physical functioning and bodily pain scales. The relation between EDSS and these SF-36 scales was consistently higher in patients with more symptoms of anxiety or depression, suggesting that anxiety and depression strengthened the association of EDSS in these SF-36 physical health scales. After adjustment for anxiety and depression, EDSS was not significantly related to the SF-36 mental health scales and the general health scale. This finding is compatible with the hypothesis that anxiety and depression are intermediate factors in the association of EDSS with these SF-36 scales. Screening for symptoms of anxiety and depression is recommended in studies that use QoL as an outcome measure of treatment or intervention efficacy.