TABLE 2.

Comparison of mean serum 25(OH)D concentrations by endoscopic, clinical, and histologic disease activity¹

	n	Vitamin D concentration, ng/mL	P value
Mayo endoscopy score			0.01
0	107	22.3 ± 7.5
1	59	23.0 ± 7.5
2	38	21.1 ± 7.2
3	26	17.9 ± 6.9
Total Mayo score			0.001
0–2	149	22.6 ± 7.3
3–5	33	22.4 ± 8.4
6–9	29	21.0 ± 6.8
10–12	19	15.8 ± 5.7
Histologic score			0.02
Normal	15	20.3 ± 6.2
Quiescent	96	23.3 ± 7.4
Mild	55	22.0 ± 7.7
Moderate	40	20.6 ± 7.8
Severe	24	18.1 ± 6.3

¹Mean ± SD serum 25(OH)D concentrations were compared with ordinal values in the Mayo endoscopy score, total Mayo score, and histologic score. P values were calculated with the use of the nonparametric trend test and represent the trend in serum 25(OH)D concentrations across ordinal values in the represented scoring index. 25(OH)D, 25-hydroxyvitamin D.