A recent article in the Archives found a bidirectional association between depression and type 2 diabetes mellitus in women.1 The results were partly explained by, but independent of, such factors as adiposity and activity level. Overlooked in the article was any mention of the role that serum 25-hydroxyvitamin D [25(OH)D] level might play in explaining the findings.
Grant WB. Low Serum 25-Hydroxyvitamin D Levels and the Bidirectional Association Between Depression and Type 2 Diabetes Mellitus in Women. Arch Intern Med. 2011;171(11):1041-1042. doi:10.1001/archinternmed.2011.222