Figure 77. (A) Mean (SEM) serum levels of 25(OH)vitamin D in patients with cystic fibrosis, treated with UVB (▲) (n = 9), and non-treated CF patients as controls (●) (n = 14) at baseline and after 8, 16 and 24 weeks. There were significant differences between the groups at all time points except at baseline (ANOVA, p < 0.0001). (B) Mean (± SEM) serum 25-hydroxyvitamin D concentration (ng/mL) before and after 8 weeks of UV light to cystic fibrosis (CF) subjects. Serum 25-hydroxyvitamin D [25(OH)D] levels in the five CF subjects at baseline were 21 ± 3 ng/ml, which increased to 27 ± 4 ng/ml at the end of 8 weeks (p = 0.05). Reproduced with permission from.²²⁷