Seasonal variation in fasting plasma glucose levels in man.
A Southern California community study of 4,541 men and women (aged 20-79 years) showed significant seasonal variation in fasting plasma glucose. There was a mean 0.6 mmol/l difference between highest levels in winter and lowest levels in spring. This difference was consistent over a two-year period, similar at all ages and seen in both men and women. Fasting plasma glucose levels correlated directly with percentage possible sunshine (p = 0.03) and inversely with temperature (p = 0.04). Adjustment for the level of measured obesity did not alter the observed association, but a history of recent weight gain corresponded to the season of maximum fasting plasma glucose level.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001786:Blood Glucose / Q000032:analysis*; D003430:Cross-Sectional Studies; D004032:Diet; D005215:Fasting; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000097:blood; D005082:Physical Exertion; D012621:Seasons; D012737:Sex Factors
D001786:Blood Glucose