Table 1.

Prevalence of vitamin D insufficiency (25-hydroxyvitamin D < 32 ng/mL) and associated levels of calcium in US adults from National Health and Nutrition Examination Survey III (1988−1994)

Race	White	Black	Mexican American	Other
Prevalence of vitamin D insufficiency	61%	92%	81%	79%
Body mass index	Normal weight	Overweight	Obese
Prevalence of vitamin D insufficiency	71%	76%	85%
Season	Winter	Spring	Summer	Fall
Prevalence of vitamin D insufficiency	83%	73%	70%	78%
Age	Age 19−49 years		Age 50 years or older
Prevalence of vitamin D insufficiency	77%		75%
Mean calcium intake among those with vitamin D sufficiency	943 mg		817 mg
Mean calcium intake among those with vitamin D insufficiency	767 mg		656 mg