Figure 2From: 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 – average concentration by age and sex – results for all ages. Average 25(OH)D results at WCMC (A), UIHC (B), and ARUP (C) by age and sex (female = red lines; male = blue lines). Variability at young and old ages (particularly A and B) may be due to comparatively small n-values (see Figure 1C,D).Back to article page