Figure 1
From: Vitamin D status and its association with season, hospital and sepsis mortality in critical illness
Seasonal variation of the prevalence of vitamin D deficiency and mean 25(OH) D values. The prevalence of vitamin D deficiency was higher in winter compared to the summer/autumn months. In August, only 29% were classified as vitamin D deficient, while in or after winter months, the prevalence reached more than 80% (March, 84%, October 87% and November 83%). 25(OH) D, 25-hydroxyvitamin D.