Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers

Table 1

Vitamin D (nmol/L) before and after summer in men and women classified by glucose tolerance status.

Vitamin D (nmol/L)	Before summer mean (SD)	After summer mean (SD)	value
Men NGT	53.3 ± 19.0	64.0 ± 22.0
Men IGT + T2DM	54.9 ± 27.4	69.2 ± 27.0
Women NGT	56.5 ± 17.8	67.9 ± 17.7
Women IGT + T2DM	55.0 ± 27.3	62.4 ± 19.4
All participants	55.1 ± 21.7	66.3 ± 21.0
Second summer season	56.0 ± 22.0	67.5 ± 22.2

Values are reported as mean ± standard deviation. Abbreviations: NGT, normal glucose tolerance; IGT, impaired glucose tolerance, T2DM, type 2 diabetes mellitus.