Table 2.

Serum 25-OH D level stratified by season, race/ethnicity, age, and obesity

Prostate cancer cases, mean (SD)Negative biopsies, mean (SD)Pa
Season of blood draw
 Low UV (November–April)21.2 (10.1)22.1 (11.6)0.48
 High UV (May–October)22.6 (9.8)24.8 (11.9)0.11
Race/ethnicity
 African American16.7 (8.2)19.3 (10.4)0.04
 Non–African American25.7 (9.5)25.6 (12.0)0.92
Age, y
 Less than 5520.3 (10.5)21.6 (9.7)0.54
 55–6922.2 (9.8)23.7 (12.2)0.19
 70 or older22.0 (10.2)25.1 (12.8)0.24
Obesity
 BMI < 3022.6 (10.0)24.7 (12.8)0.07
 BMI ≥ 3020.7 (10.3)21.9 (9.3)0.50
 BMI ≥ 3519.0 (10.4)25.5 (8.2)0.68

NOTE: P values in bold print have reached statistical significance (P < 0.05).

  • aUnpaired, two-sample t test.