Selected Parameters Associated with Low Bone Mineral Density (Z score≤−2.0).

†BMI, alcohol, and recreational drug use data were available in 196 subjects who enrolled.‡There were no cases of low BMD among Asian/Pacific Islander men, heavy alcohol users, and those who reported use of corticosteroids, anabolic hormones, or muscle building supplements.*Tobacco use and exercise/family history data available in 155 participants who enrolled.