PMC

Box-and-whisker plots for distribution of 25(OH)D concentrations at times A and B. The bottom and top horizontal lines of the box represent the 25th and 75th percentiles, respectively. The band near the middle of the box represents the median value. The ends of the whiskers represent the 5th and 95th percentiles. Median (25th, 75th percentiles) was 65.9 (45.8, 85.0) for time A and 69.3 (50.9, 92.6) for time B. Wilcoxon signed rank P < 0.0001.