The association of self-reported diabetes with impaired social functioning in low-, middle- and high-income countries: findings from the World Health Survey.

AIM: Epidemiological studies from high-income countries show that diabetes is associated with impaired social functioning. As healthcare systems in middle- and low-income countries offer fewer resources to curtail the potential social impact of diabetes, we performed a comparative study on the diabetes-social impairment link in low-, middle- and high-income countries. METHODS: We use data from the cross-sectional World Health Survey (n = 235 428 from 10 low-income, 29 middle-income and 9 high-income countries). Diabetes was defined by self-reports of a diagnosis. Impaired social functioning was considered present if participants reported severe or extreme difficulties with personal relationships or participation in the community. Logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CIs) in the overall sample and by income regions. ORs were corrected for demographics and health-related lifestyles, and then additionally adjusted for impairments that may explain any observed association (i.e. impaired vision, mood, cognition and mobility). RESULTS: In the overall sample, we confirmed an association between self-reported diabetes and impaired social functioning (OR = 1.47, 95% CI = 1.18-1.83). The strength of that relationship increased with decreasing country income (e.g. OR in low-income countries = 2.23, 95% CI = 1.14-4.37). Associations were substantially attenuated by further correction for impairments, in particular mood problems, in the overall sample (OR = 0.92, 95% CI = 0.72-1.16) and all income regions. CONCLUSIONS: Self-reported diabetes is associated with impaired social functioning in high- and middle-income countries, and this relationship is even stronger in low-income countries. Associations are largely explained by physical and mental impairments, which may be due to diabetes.

Physician burnout, work engagement and the quality of patient care.

BACKGROUND: Research suggests that burnout in physicians is associated with poorer patient care, but evidence is inconclusive. More recently, the concept of work engagement has emerged (i.e. the beneficial counterpart of burnout) and has been associated with better care. Evidence remains markedly sparse however. AIMS: To examine the associations of burnout and work engagement with physicians' self-perceived quality of care. METHODS: We drew on cross-sectional data from physicians in Germany. We used a six-item version of the Maslach Burnout Inventory measuring exhaustion and depersonalization. We employed the nine-item Utrecht Work Engagement Scale to assess work engagement and its subcomponents: vigour, dedication and absorption. We measured physicians' own perceptions of their quality of care by a six-item instrument covering practices and attitudes. We used continuous and categorized dependent and independent variables in linear and logistic regression analyses. RESULTS: There were 416 participants. In multivariable linear regression analyses, increasing burnout total scores were associated with poorer perceived quality of care [unstandardized regression coefficient (b) = 0.45, 95% confidence interval (CI) 0.37, 0.54]. This association was stronger for depersonalization (b = 0.37, 95% CI 0.29, 0.44) than for exhaustion (b = 0.26, 95% CI 0.18, 0.33). Increasing work engagement was associated with higher perceived quality care (b for the total score = -0.20, 95% CI -0.28, -0.11). This was confirmed for each subcomponent with stronger associations for vigour (b = -0.21, 95% CI -0.29, -0.13) and dedication (b = -0.16, 95% CI -0.24, -0.09) than for absorption (b = -0.12, 95% CI -0.20, -0.04). Logistic regression analyses yielded comparable results. CONCLUSIONS: Physician burnout was associated with self-perceived poorer patient care, while work engagement related to self-reported better care. Studies are needed to corroborate these findings, particularly for work engagement.

The association between diabetes and an episode of depressive symptoms in the 2002 World Health Survey: an analysis of 231,797 individuals from 47 countries.

AIMS: Depression is common in people with diabetes and increases the risk of poor health outcomes, including premature mortality. We explored the association between diabetes and an episode of depressive symptoms in a cross-sectional multinational study, which included a large number of low- and middle-income non-Western countries. METHODS: Data from 47 countries of the 2002 World Health Organization World Health Survey were used, including 231,797 adults (mean age 41 years, 53% female). Diabetes was assessed by self-report of diagnosis or treatment. The presence of an episode of depressive symptoms was assessed by self-report using an algorithm based on DSM-IV criteria. Odds ratios and 95% confidence intervals were calculated to quantify associations between diabetes and episodes of depressive symptoms in the entire sample and for countries aggregated into four continents: Africa, South America, Asia and Europe. Odds ratios were adjusted for age, sex, education, BMI, smoking and physical activity level. RESULTS: The prevalence of diabetes (mean 3.6%, range 0.2-13%) and episodes of depressive symptoms (mean 7.9%, range 0.4-38%) differed widely across countries. Globally, individuals with diabetes had increased odds of an episode of depressive symptoms compared with those without diabetes (adjusted odds ratio 2.36, 95% confidence interval 1.91-2.92). Similar associations were found in South America, Asia and Europe (odds ratio > 1.97), but not in Africa (odds ratio 0.86, 95% confidence interval 0.54-1.37). CONCLUSIONS: Globally, diabetes is associated with a twofold increased prevalence of an episode of depressive symptoms, except in Africa. Given the worldwide rise in diabetes in the coming decades, and the increased risk of poor diabetes outcomes associated with co-morbid depression, studies examining mechanisms and interventions are necessary.

The psychiatric vulnerability gene CACNA1C and its sex-specific relationship with personality traits, resilience factors and depressive symptoms in the general population.

Genome-wide association studies have reported an association between the A-allele of rs1006737 within CACNA1C and affective disorders and schizophrenia. The aim of the present study was to investigate the relationship between rs1006737 and established and potential endophenotypes for these disorders in a population-based cohort of 3793 subjects, using an analytical method designed to assess a previously reported sex-specific effect of CACNA1C. The investigated endophenotypes included personality traits and resilience factors. At 10-year follow-up, subjects were screened for depressive symptoms. All subjects were genotyped for rs1006737. The direction of the effect and mode of inheritance of rs1006737 differed between the sexes. In men, the A-allele was associated with higher emotional lability and lower resilience, that is, lower sense of coherence (P=0.021), lower perceived social support (P=0.018), lower dispositional optimism (P=0.032) and more depressive symptoms at follow-up (P=0.007). In women, the A-allele was associated with lower emotional lability and stronger resilience, that is, higher sense of coherence (P=0.00028), higher perceived social support (P=0.010), lower neuroticism (P=0.022) and fewer depressive symptoms at follow-up (P=0.035). After conservative Bonferroni correction for 32 tests, results only remained significant for sense of coherence in women (P=0.009). These results suggest that CACNA1C is involved in the genetic architecture of endophenotypes for affective disorders and schizophrenia, and that it shows a distinct sex-specific effect. Comprehensive phenotype characterization in case-control samples and the general population, as well as an adequate modeling of sex-specific genetic effects, may be warranted to elucidate the pathogenetic mechanisms conferred by robustly identified susceptibility genes.

Prevalence, Trend and Determining Factors of Gestational Diabetes in Germany.

Purpose: The true prevalence of gestational diabetes in Germany is unknown. Thus, the study's purposes were to estimate the prevalence of gestational diabetes as well as to describe the temporal prevalence trend and to identify determinants. Material and Methods: We calculated prevalence estimates based on two datasets: the register-based German perinatal statistic (n = 650 232) and the maternal self-reports from the German children and youth health survey (KiGGS; n = 15 429). Differences between prevalence estimates were analysed using χ2 and trend tests, and determinants were identified using logistic regression. Results: According to the perinatal statistic, gestational diabetes was present in 3.7 % of pregnant women in Germany in 2010. The prevalence across the years 2001 to 2006 was estimated at 1.9 % which differed significantly from the prevalence estimate derived from the KiGGS dataset for the same period of time (5.3 %; 95 % confidence interval: 4.6-6.1 %). Both datasets show an increasing trend of gestational diabetes (p < 0.001). The risk for gestational diabetes was mainly associated with age, BMI and social class of pregnant women as well as with multiple pregnancies. Conclusion: The lack of significant screening studies among representative samples hampers a sound estimation of the true prevalence of gestational diabetes in Germany. The increasing trend in gestational diabetes might continue due to the projected increase of important risk factors (e.g., maternal age, obesity). Our analyses support the current consensus recommendations regarding standardised gestational diabetes screening.

Work-related stress, inability to relax after work and risk of adult asthma: a population-based cohort study.

BACKGROUND: There is an extensive literature linking stressful work conditions to adverse health outcomes. Notwithstanding, the relationship with asthma has not been examined, although various other measures of psychological stress have been associated with asthma. Therefore, we aimed to investigate the relation between work stress and asthma prevalence and incidence. METHODS: We used data from a population-based cohort study (n = 5114 at baseline in 1992-1995 and n = 4010 at follow-up in 2002/2003). Asthma was measured by self-reports. Two scales that assessed psychologically adverse work conditions were extracted from a list of work-condition items by factor analysis (these scales were termed 'work stress' and 'inability to relax after work'). For each scale, the derived score was employed both as continuous z-score and as categorized variable in analyses. Associations with asthma were estimated by prevalence ratios (PRs) and risk ratios (RRs) using Poisson regression with a log-link function adjusting for demographics, health-related lifestyles, body mass index and family history of asthma. Analyses were restricted to those in employment (n = 3341). RESULTS: Work stress and inability to relax z-scores were positively associated with asthma prevalence (PR = 1.15, 95%CI = 0.97, 1.36 and PR = 1.43, 95%CI = 1.12, 1.83, respectively). Prospective analyses using z-scores showed that for each 1 standard deviation increase in work stress and inability to relax, the risk of asthma increased by approximately 40% (RR for work stress = 1.46, 95%CI = 1.06, 2.00; RR for inability to relax = 1.39, 95%CI = 1.01, 1.91). Similar patterns of associations were observed in analyses of categorized exposures. CONCLUSIONS: This is the first study to show a cross-sectional and longitudinal association of work stress with asthma.

Neuroticism, extraversion, stressful life events and asthma: a cohort study of middle-aged adults.

BACKGROUND: Stressful life events can trigger asthma exacerbations, but could also contribute to the development of incident asthma. However, only few studies have investigated the association between stressful life events and adult asthma prospectively. Likewise, stress-related personality traits (e.g. neuroticism and extraversion) may increase asthma risk, but this has been examined in only one prospective study. We therefore aimed to investigate the association between neuroticism, extraversion, stressful life events and incident asthma. METHODS: A population-based sample of 5114 middle-aged adults completed questionnaires between 1992 and 1995. Among those alive in 2002/2003, 4010 (83%) were followed-up by questionnaires. Exposures of interest included neuroticism, extraversion and three stressful life events (unemployment, having broken off a life partnership and death of a close person). Associations with incident asthma were estimated by multivariable risk ratios (RR) and 95% confidence intervals (95% CI) using Poisson regression. RESULTS: High vs low neuroticism predisposed to developing asthma (RR = 3.07, 95% CI = 1.71-5.48), but high extraversion did not (RR = 1.30, 95% CI = 0.79-2.15). Having broken off a life partnership significantly increased asthma risk (RR = 2.24, 95% CI = 1.20-4.21) in contrast to death of a close person (RR = 1.06, 95% CI = 0.64-1.75) or unemployment (RR = 1.65, 95% CI = 0.72-3.78). CONCLUSIONS: High levels of neuroticism may increase the risk of asthma in middle-aged adults. Having broken off a life partnership was the only stressful event, which was associated with incident asthma. Synthesized with evidence from earlier studies, this could reflect that interpersonal conflicts may increase asthma risk, possibly along an immunological pathway.