The relationship between chronic diseases and number of sexual partners: an exploratory analysis.

BACKGROUND: We investigated sex-specific associations between lifetime number of sexual partners and several health outcomes in a large sample of older adults in England. METHODS: We used cross-sectional data from 2537 men and 3185 women aged ≥50 years participating in the English Longitudinal Study of Ageing. Participants reported the number of sexual partners they had had in their lifetime. Outcomes were self-rated health and self-reported limiting long-standing illness, cancer, coronary heart disease, and stroke. We used logistic regression to analyse associations between lifetime number of sexual partners and health outcomes, adjusted for relevant sociodemographic and health-related covariates. RESULTS: Having had 10 or more lifetime sexual partners was associated with higher odds of reporting a diagnosis of cancer than having had 0-1 sexual partners in men (OR 1.69, 95% CI 1.01 to 2.83) and women (OR 1.91, 95% CI 1.04 to 3.51), respectively. Women who had 10 or more lifetime sexual partners also had higher odds of reporting a limiting long-standing illness (OR 1.64, 95% CI 1.15 to 2.35). No other statistically significant associations were observed. CONCLUSIONS: A higher lifetime number of sexual partners is associated with increased odds of reported cancer. Longitudinal research is required to establish causality. Understanding the predictive value of lifetime number of sexual partners as a behavioural risk factor may improve clinical assessment of cancer risk in older adults.

The volume prediction on the experimental design hippocampus using stereological method.

The application of stereologic techniques to the analysis of the nervous system has greatly contributed to the evaluation of the normal and pathological anatomy of the aging brain. Currently, the hippocampus still holds secrets about the aging process. Experimental researches on hippocampus morphology may contribute to the future researches. This study presents the volume and weight of left hippocampus using a stereological technique on light microscope. The mean weight of the encephalon without cerebellum was 6.1 ± 0.1 g. The mean weight and the volume of the hippocampus were (mean ± SD) 0.28 ± 0.02 g and 0.28 ± 0.02 cm3, respectively. The mean coefficient of error for the stereological volume estimation of the hippocampus was 0.03. The individual volume estimation of the subjects may be achieved by the Cavalieri method. Investigators believed that the findings and the applied technique in this study may be useful for clinicians.