Table 2.

Prevalence of vitamin D deficiency (plasma 25-OHD, <20 ng/mL) by age, race, BMI, and season of blood draw among controls

Characteristics among controlsVitamin D deficiency n (%)P*
Age, y
    <4029 (29)0.480
    40-5092 (32)
    51-6079 (27)
    61-7058 (25)
    >7044 (29)
Race
    White262 (26)<0.001
    Non- White40 (49)
BMI, kg/m2
    <25121 (22)<0.001
    25-30101 (32)
    >3080 (37)
Season of blood draw
    Jan-Mar99 (38)<0.001
    Apr-Jun99 (34)
    July-Sept26 (12)
    Oct-Dec78 (26)
  • *Based on χ2 test.