Figure 1From: Analysis of vitamin D status at two academic medical centers and a national reference laboratory: result patterns vary by age, gender, season, and patient location 25(OH)D immunoassay - orders by institution, age, and sex. A, B. Average number of 25(OH)D orders per month (in six month bins) at WCMC (A) and UIHC (B). Error bars are ± SD. C,D. Total number of orders by patient age and sex (female = red lines; male = blue lines) at WCMC (C; 20 months analyzed) and UIHC (D; 153 months analyzed). Data are binned to 1 yr age intervals.Back to article page