Are mothers a source of support for women entering fertility treatment?

The significance of the mother–daughter dyad in coping with stressful circumstances led us to examine (a) the associations between the mental health of women entering fertility treatment (n = 137; 76 aged 20–34; 61 aged 35–44) and the perceived type of support they receive from their mothers; (b) whether mental health is associated with age, and whether this association is moderated by the type of mother's support. We found that women perceiving more active engagement from their mothers reported greater well-being and less distress, whereas higher mothers' overprotection was associated with greater distress. Active engagement and protective buffering moderated the association between age and mental health.     

Is tea a healthy source of hydration?

After water, tea is the most commonly consumed beverage worldwide, with over 80% of adults drinking tea in the UK. Lay concerns about caffeine have led to questions about the suitability of tea as a source of hydration. Several controlled trials have examined the effect of moderate caffeine consumption on fluid balance, from tea or other sources, concluding that intakes of up to 400 mg of caffeine, or six to eight servings of tea daily, are consistent with normal hydration. Unlike water, or other caffeinated beverages, tea is rich in flavonoids: plant compounds associated with health. There is now a growing body of evidence linking regular tea consumption with heart health, cognitive health, dental benefits and bodyweight management suggesting that tea may offer a healthy source of hydration. These studies are discussed in the context of typical tea intakes in the UK.     

Monitoring of weight in weight loss programs: a double-edged sword?

Body size feedback is commonly provided to clients in weight loss programs. The attention focused on one's current, and presumably undesirable, body size can be motivating for those who want to modify a pattern of unhealthful behaviors. For others, this feedback may result in psychological distress and could lead to outcomes that are, in fact, counter to a weight loss strategy, such as attrition from programs, misreporting of dietary intake, and emotional states associated with binge eating. Dietitians and weight loss professionals should provide weight feedback judiciously, especially to vulnerable clients, and perhaps soften the emphasis on body size altogether.     

Are video display terminals a source of increased PCB concentration in the working atmosphere?

Summary In response to the question: Are datascreen terminals a source of increased PCB concentrations in the working atmosphere? a study of PCB emissions from video display terminals (VDT) was undertaken. Emissions of 2.4 to 8.1 ng PCB/h were observed from VDT located in a building (1) where the mean PCB level in the air was 46 ng PCB/m³ during the test period, whereas no PCB emissions were detected from VDT located in a building (2) where no PCB could be detected in the ambient air. However, both the air and the VDT from building 2 were found to be contaminated with polycyclic aromatic hydrocarbons. We conclude that the observed PCB emissions from VDT are the result of the vapourization of PCB deposited onto the VDT from the PCB contaminated air and do not originate from the electrical components of the VDT.     

Has the adolescents' weight concern increased over 20 years?

BACKGROUND: The aim of this study is to evaluate whether the proportion of 12 to 18-year-old adolescents perceiving themselves to be overweight has increased from the late 1970s to the late 1990s, and to evaluate how self-reported weight is associated with weight concern in the different age groups among girls and boys, and how this association has changed over time. MATERIAL: A nationally representative sample of 26,700 girls and 23,346 boys, aged 12-18 years, who responded to the postal survey study Adolescent Health and Lifestyle Survey in 1979-1999. METHODS: Self-reported information about weight, height and satisfaction with one's own weight. RESULTS: Girls reported more concerns of being overweight than boys. The proportion of those perceiving themselves as being overweight decreased over time both among overweight and among normal weight adolescents. CONCLUSION: Even if the adolescent population has gained weight, they are less concerned at being overweight than earlier. It seems that adolescents compare themselves rather to the peers close to them than to ideal models provided by culture at large.     

Are men and women equally violent to intimate partners?

Violence against women is a significant public health issue. One form of violence against women, intimate partner abuse or domestic violence, is prevalent in Australia. In this article, we summarise the main theoretical and methodological debates informing prevalence research in this area. We explain why studies finding equivalent victimisation and perpetration rates between the sexes are conceptually and methodologically flawed and why coercion and control are fundamental to the definition and measurement of partner abuse. We conclude that while male victims of partner abuse certainly exist, male victims of other forms of male violence are more prevalent. A focus on gendered risk of violence in public health policy should target male-to-male public violence and male-to-female intimate partner abuse.     

Can secondary school students' self-reported measures of height and weight be trusted? An effect size approach

BACKGROUND: Self-reported measures of height and weight are a cost-effective alternative to direct measures in large-scale studies. This study was designed to examine the accuracy of adolescent students' self-reported height and weight taking into consideration the magnitude of the differences. METHODS: Self-reported height and weight were taken from 300 secondary public schools students. Participants' actual height and weight were subsequently verified. Body mass index (BMI; kg/m2) was calculated separately from reported and from actual measures. Adolescents' whose measured BMI was above the 85th percentile were characterized as 'at risk for overweight/obese'. RESULTS: There was no gender effect on the discrepancy between reported and actual measures. Overall adolescents significantly underestimated their weight and BMI. Although correlation coefficients were high, eta-square (eta2) values indicate large bias for weight (0.36) and BMI (0.31). 'At risk for overweight/obese' individuals underestimated their weight and BMI to a greater extent than their 'normal weight' counterparts. CONCLUSIONS: The magnitude of the discrepancies call into question the accuracy of self-reported weight and consequently the estimated BMI. Correlation coefficients did not provide any valuable information about the discrepancy between the self-reported and actual measures. A better understanding of the validity of self-reported height and weight could be reached if interpretation of the results is based on both statistical significance and magnitude of the differences.     

Are child sexual experiences related to eating-disordered attitudes and behaviors in a college sample?

Clinicians and theorists have suggested a link between child sexual abuse (CSA) and the later development of eating disorders. Finkelhor and Browne (1986) argue that this link is mediated by abuse characteristics, personality variables, and levels of family support. The present study investigated child sexual experiences and family support as predictors of disordered attitudes and behaviors in a well-functioning female college sample. Abused respondents had higher total scores on the Eating Disorders Inventory (EDI) than nonabused respondents, but a MANOVA revealed no between-group differences on the EDI subscales. Further, abuse characteristics were either unrelated (e.g., severity) or weakly related (e.g., reaction to abuse) to EDI scores. Family support, especially parental reliability, did predict EDI scores. This was more true for CSA victims. Thus, there appeared to be an interactive relationship between abuse status and family variables in influencing EDI scores.     

Are partners available for post-abortion contraceptive counseling? A pilot study in a Baltimore City clinic

About half of the 1.2 million abortions each year in the United States are repeat abortions. While most abortion providers counsel women about contraception, one reason for the high repeat rate could be failure to take into account the social context of the women--in particular, the male partner. To assess whether there might be a window of opportunity for a contraceptive intervention that includes the male partner at the time of the abortion, we undertook a pilot study at an urban abortion clinic to examine the role of the male partner among women receiving abortions. Between May 2001 and August 2002, two questionnaires were administered to 109 women receiving abortions in a Baltimore City clinic. On the procedure day, women were more likely to be accompanied by a male partner upon arrival (30%) or when leaving (34%) than by any other individual. The majority of women receiving abortions reported that their partners played positive decision-making and support roles throughout the abortion process. A significant proportion of couples could be available for contraceptive counseling following an abortion, providing rationale for couples' post-abortion contraceptive counseling for women whose partners are already actively and positively involved in the abortion process. Such an intervention may help to reduce repeat abortions.     

Is job strain a major source of cardiovascular disease risk?

Empirical studies on job strain and cardiovascular disease (CVD), their internal validity, and the likely direction of biases were examined. The 17 longitudinal studies had the highest validity ratings. In all but two, biases towards the null dominated. Eight, including several of the largest, showed significant positive results; three had positive, nonsignificant findings. Six of nine case-control studies had significant positive findings; recall bias leading to overestimation appears to be fairly minimal. Four of eight cross-sectional studies had significant positive results. Men showed strong, consistent evidence of an association between exposure to job strain and CVD. The data of the women were more sparse and less consistent, but, as for the men, most of the studies probably underestimated existing effects. Other elements of causal inference, particularly biological plausibility, corroborated that job strain is a major CVD risk factor. Additional intervention studies are needed to examine the impact of ameliorating job strain upon CVD-related outcomes.     

Are preferences for equality a matter of perspective?

BACKGROUND: Many subjects attach equal value to different health care programs in surveys eliciting preferences for resource allocation. It has been suggested that subjects may be prepared to attach different priority if they were asked to evaluate someone else's decision instead of adopting the role of a social decision maker. This study investigated whether the perspective individuals are asked to adopt affects their priority setting decisions and the likelihood of assigning equal value to health care programs. METHODS: 1253 members of an Internet panel were presented a set of clinical vignettes describing preventive health care initiatives and were asked to prioritize among these. They choose between "discrimination," that is, allocating all resources on the better program, and "equality," that is, dividing the resources equally between programs while reducing efficiency. Respondents were randomized to either of 4 survey versions that differed in terms of perspective (evaluator vs. decision maker) and expert status (expert vs. layperson) of the role to be adopted. RESULTS: Subjects in the evaluator perspectives were more likely to choose equality over discrimination between patients as compared to those in the social decision-maker perspectives, regardless of expert status (odds ratios 2.09 and 2.03, P<0.0001). Excess rates of equality choices in the evaluator frames resulted from passive acceptance of equality decisions and active revision of prioritization decisions. CONCLUSION: Preferences for an equal allocation of resources are strongly affected by decision-making perspective but stable across expert status of the adopted role.     

Are estimates of the value of a statistical life exaggerated?

The magnitude of the value of a statistical life (VSL) is critical to the evaluation of many health and safety initiatives. To date, the large and rigorous VSL research literature has not explicitly accommodated publication selectivity bias (i.e., the reduced probability that insignificant or negative VSL values are reported). This study demonstrates that doing so is essential. For studies that employ hedonic wage equations to estimate VSL, correction for selection bias reduces the average value of a statistical life by 70-80%. Our meta-regression analysis also identifies several sources for the wide heterogeneity found among reported VSL estimates.     

The predicted pattern of emergence of vaccine-resistant hepatitis B: a cause for concern?

We develop an epidemiological model of hepatitis B virus (HBV) in The Gambia in order to investigate the possible patterns of emergence of a vaccine-resistant strain. Under pessimistic assumptions (e.g., the current vaccine provides no cross-immunity against the variant) the model predicts the variant will not become dominant over the wild-type for at least 50 years. Therefore the current low prevalence of variant infections is not evidence for high cross-immunity of the vaccine or for low infectiousness of the variant, but may simply be a consequence of the epidemiology of HBV. The efficacy of the present vaccine against possible variants needs to be evaluated now to determine whether vaccine modifications are required. However, the model also suggests that serological surveillance may be unable to determine this efficacy for 40-50 years.