Table 4

Serum 25[OH] vitamin D according to intakes of vitamin D
Item IBD Patients Patients’ Family N = 55 Controls Controls’ Family N = 48
N = 55 N = 48
25(OH)D levels in Supplement users, n 26 19 22 14
Mean ± SD 79.8 ± 36.5* 86.7 ± 24.1 70.2 ± 26.5 74.6 ± 15.9
25(OH)D levels in non Supplement users, n 21 32 22 31
Mean ± SD 59.4 ± 25.0 79.9 ± 39.6 67.9 ± 26.1 68.2 ± 31.8
Seasons:
May-Sept, n 23 27 19 21
Mean ± SD 81.6 ± 32.5 ** 83.7 ± 32.1 69.5 ± 26.3 73.3 ± 30.9
Oct-April, n 27 25 26 25
Mean ± SD 62.4 ± 31.0 80.8 ± 36.9 67.4 ± 26.6 67.1 ± 24.7

The effects of vitamin D intake on 25[OH] vitamin D with or without supplement or seasons of testing are shown for four groups. All serum 25[OH] vitamin D levels are reported as nmol/L. May –Sept are sunny months, October –April are non sunny months. N values for each group represents original number in the groups and n values actual numbers analyzed.

* The comparison of means ± SD was significant (p = 0.03 compared with patients not taking vitamin D supplements). However comparing log 25[OH] vitamin D the result became nonsignifcant (p = 0.059).

** p = 0.039 compared with patients evaluated in October to April.

Grunbaum et al.

Grunbaum et al. Nutrition Journal 2013 12:145   doi:10.1186/1475-2891-12-145

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