Table 2. The Association of Vitamin D deficiency and Occurrence of Diabetes Mellitus Type 2 .

Parameter	Case	Control	p-value
Severity of Vitamin D Deficiency
Severe Deficiency (1-10 ng/ml)	65 (12.4%)	25 (4.8%)	<0.0001
Deficiency (11-20 ng/ml)	218 (41.5%)	125 (23.8%)
Suboptimal Levels (21-30 ng/ml)	153 (29.1%)	185 (35.2%)
Upper Normal Levels (31-40 ng/ml)	88 (16.8%)	190 (36.2%)
Vitamin D Level Categories
Normal	241 (25.9%)	375 (71.4%)	<0.0001
Vitamin D Deficiency	284 (54.1%)	150 (28.6%)