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Correlates and Prevalence of Insufficient 25‐Hydroxyvitamin D Status in Black and White Older Adults: The Health, Aging and Body Composition Study
Author(s) -
Shea M. Kyla,
Houston Denise K.,
Tooze Janet A.,
Davis Cralen C.,
Johnson Mary Ann,
Hausman Dorothy B.,
Cauley Jane A.,
Bauer Douglas C.,
Tylavsky Frances,
Harris Tamara B.,
Kritchevsky Stephen B.
Publication year - 2011
Publication title -
journal of the american geriatrics society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.992
H-Index - 232
eISSN - 1532-5415
pISSN - 0002-8614
DOI - 10.1111/j.1532-5415.2011.03476.x
Subject(s) - medicine , multivitamin , vitamin d and neurology , odds ratio , obesity , confidence interval , cross sectional study , logistic regression , diabetes mellitus , vitamin , demography , gerontology , endocrinology , pathology , sociology
OBJECTIVES: To determine the prevalence and correlates of vitamin D insufficiency in black and white older adults. DESIGN: Cross‐sectional. SETTING: Health, Aging and Body Composition Study. PARTICIPANTS: Nine hundred seventy‐seven black and 1,604 white adults aged 70 to 81. MEASUREMENTS: Logistic regression and classification and regression tree analysis were used to identify correlates of vitamin D insufficiency (25‐hydroxyvitamin D (25(OH)D) <30 ng/mL) separately in blacks and whites. RESULTS: The prevalence of 25(OH)D insufficiency was 84% in blacks and 57% in whites. Seventy‐six percent of blacks and 56% of whites did not take a multivitamin; those who did not take a multivitamin were more likely to be vitamin D insufficient (odds ratio (OR)=5.17 (95% confidence interval (CI)=3.47–7.70) for blacks; OR=2.56, 95% CI=2.05–3.19 for white). Additional risk factors for vitamin D insufficiency were vitamin D–containing supplement use, female sex, and obesity in blacks; and winter season, low dietary vitamin D intake, obesity, type 2 diabetes mellitus, and female sex in whites. CONCLUSION: Vitamin D insufficiency was more prevalent in blacks than whites. Not consuming a multivitamin increased the odds of vitamin D insufficiency in blacks and whites. Knowledge of additional risk factors such as dietary intake and comorbid conditions may help identify older adults who are likely to be vitamin D insufficient.