TY - GEN AU - Llewellyn,David J AU - Langa,Kenneth M AU - Lang,Iain A TI - Serum 25-hydroxyvitamin D concentration and cognitive impairment SN - 0891-9887 PY - 2009///1006 KW - Aged KW - Aged, 80 and over KW - Cognition Disorders KW - blood KW - Female KW - Humans KW - Linear Models KW - Logistic Models KW - Male KW - Neuropsychological Tests KW - Odds Ratio KW - Vitamin D KW - analogs & derivatives N1 - Publication Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't UR - https://doi.org/10.1177/0891988708327888 ER -