Relationship between Serum 25-Hydroxyvitamin D and Lower Extremity Arterial Disease in Type 2 Diabetes Mellitus Patients and the Analysis of the Intervention of Vitamin D

Table 2

Cases with different levels of 25(OH)D in Groups NC, DM1, and DM2.

Group	25(OH)D < 20	≤20 < 25(OH)D ≤ 30	25(OH)D > 30	Chi-squared
NC	6 (15.8%)	25 (65.8%)	7 (18.4%)	38.84	<0.01
DM1	29 (64.4%)	12 (26.7%)	4 (8.9%)
DM2	48 (77.4%)	9 (14.5%)	5 (8.1%)

Note: NC versus DM1: ; NC versus DM2: ; DM1 versus DM2: .