Associations between insomnia symptoms and bone mineral density (BMD)^a.

a Values in the table are β coefficients and 95% confidence interval in the regression model.
b Adjusted for age (year), educational level, smoking status (never smoke, past smoker and current smoker), drinking status (not current drinker, current moderate drinker and current heavy drinker), body mass index (Kg/m2), physical activity score, presence of hypertension (y/n), diabetes (y/n), arthritis (y/n), plasma 25-hydroxyvitamin D concentration (ng/mL), snoring frequency (every/most night, a few nights a week, and occasionally/rare), osteoporosis medication use (y/n), CES-D score among men, and menopause status (y/n, women alone).
Associations between insomnia symptoms and bone mineral density (BMD)a.