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Objectives Global self-rated health (SRH) has become extensively used as an outcome measure in population health surveillance. The aim of this study was to analyse the effects of age and secular trend (year of investigation) on SRH.

Design Prospective cohort study, using population-based data from eight ongoing cohort studies, with sampling performed between 1973 and 2003.

Setting Sweden.

Participants 11 880 women and men, aged 25–99 years, providing 14 470 observations.

Primary outcome measure Global SRH.

Results In multiple ordinal logistic regression analyses, adjusted for the effects of covariates, there were independent effects of age (p<0.0001) and of year of investigation (p<0.0001) on SRH. In women the association was linear, showing lower levels of SRH with increased age, and more recent year of investigation. In men the association was curvilinear, and thus more complex. The final model explained 76.2% of the SRH variance in women and 74.5% of the variance in men.

Conclusions SRH was strongly and inversely associated with age in both sexes, after adjustment for other outcome-affecting variables. There was a strongly significant effect of year of investigation indicating a change in SRH, in women towards lower levels over calendar time, in men with fluctuations across time.

Objective: Simple global self-ratings of health have been found to hold considerable predictive validity in relation to morbidity and mortality. Inverse associations between chronic stress and self-rated health (SRH) have been found and suggested to explain part of the predictive validity of SRH. Studies including biological data are, however, few. The purpose of this paper is to study the relationship between endocrine measures of stress and SRH.

Methods: A longitudinal study of 102 healthy middle-aged men. Written questionnaires and blood samples were collected at baseline and at follow-up 1 year later.

Results: A decrease in SRH below the level of good was associated with significantly increased s-prolactin and decreased s-testosterone. Poorer SRH and increased levels of s-prolactin were significantly associated with increased vital exhaustion at follow-up.

Conclusion: Our study identifies a possible biological pathway, which might be of relevance in understanding the well-established association between SRH and health.

Background. Self-rated health (SRH) is a robust predictor of subsequent health outcome, independent of objective health measures and life-style-related health risk factors. However, the determinants of SRH are as yet largely unknown. In accordance with the prevailing stress theory, we hypothesized that SRH is associated with personal coping resources, psychological strain, life-style variables, and endocrine variables.

Methods. A total of 106 healthy women, 22-59 years of age, were followed for up to 3 years with annual blood sampling (cortisol, prolactin, testosterone) and written questionnaires in which information on SRH, psychological strain, coping resources, socio-economic and life-style variables was sought.

Results. In bivariate, screening logistic regression analyses, intended to find candidate variables for a final analysis model, all coping resource variables (sense of coherence, mastery, and self-esteem) were significantly related to SRH, and so were two psychological strain variables (vital exhaustion, and sleep disturbances), one life-style variable (fitness), but none of the endocrine variables. In the final multivariate analysis model, including all candidate variables, only vital exhaustion (P < 0.0001), fitness (P = 0.0002), and sense of coherence (P = 0.0006) were independently associated with SRH, together explaining 74% of the SRH variance.

Conclusion. Some elements of the hypothesis, i.e. the effects of coping resources, psychological strain, and life-style variables on SRH, were supported by the results, while others, i.e. effects of endocrine measures on SRH, were not, indicating a possible gender difference.