Vitamin D and Risk of Incident Type 2 Diabetes in Older Adults: An Updated Systematic Review and Meta-Analysis.

Vitamin D deficiency is very common worldwide, particularly in old age, when people are at the highest risk of the negative adverse consequences of hypovitaminosis D. Additionally to the recognized functions in the regulation of calcium absorption, bone remodeling, and bone growth, vitamin D plays a key role as a hormone, which is supported by various enzymatic, physiological, metabolic, and pathophysiological processes related to various human organs and systems. Accruing evidence supports that vitamin D plays a key role in pancreatic islet dysfunction and insulin resistance in type 2 diabetes. From an epidemiological viewpoint, numerous studies suggest that the growing incidence of type 2 diabetes in humans may be linked to the global trend of prevalent vitamin D insufficiency. In the past, this association has raised discussions due to the equivocal results, which lately have been more convincing of the true role of vitamin D supplementation in the prevention of incident type 2 diabetes. Most meta-analyses evaluating this role have been conducted in adults or young older persons (50-60 years old), with only one focusing on older populations, even if this is the population at greater risk of both hypovitaminosis D and type 2 diabetes. Therefore, we conducted an update of the previous systematic review and meta-analysis examining whether hypovitaminosis D (low serum 25OHD levels) can predict incident diabetes in prospective longitudinal studies among older adults. We found that low 25OHD was associated with incident diabetes in older adults even after adjusting for several relevant potential confounders, confirming and updating the results of the only previous meta-analysis conducted in 2017.

Multimorbidity increased the risk of urinary incontinence in community-dwelling adults: Results from the English Longitudinal Study On Ageing.

Multimorbidity (MM) is common in older people. Recent evidence, largely from cross-sectional studies, suggests that MM could be a risk factor for urinary incontinence (UI). For this reason, we aimed to explore the association between MM at baseline and incident UI, and which individual chronic medical conditions/factors might explain the association between MM and UI, using data from the English Longitudinal Study on Ageing, during ten years of follow-up. MM was defined as having two or more chronic medical conditions; the presence of UI was assessed using self-reported information. A logistic regression analysis, adjusted for baseline potential confounders, was used to assess the association between MM and UI, reporting the data as odds ratios (ORs) with their 95 % confidence intervals (CIs). Of 9432 initial participants, 6742 (mean age: 64.8 years; 53.2 % females) without UI at baseline were included in the analysis. MM was present at baseline in 48.8 % of the participants. People with MM had a significantly higher cumulative incidence of UI than their counterparts, leading to a significantly higher risk of UI also after adjusting for potential confounders at baseline (OR = 1.30; 95 % CI: 1.14-1.48). Among the medical conditions, only three were significantly associated with incident UI, namely asthma, Parkinson's disease, and psychiatric disorders. In conclusion, MM at baseline was associated with an increased risk of UI during ten years of follow-up, suggesting that UI is more likely to be present in people with several chronic medical conditions.