Table 2.

Descriptive statistics for clinical and lifestyle characteristics (n = 291)

Clinical and lifestyle characteristics	Response	Frequency (percentage)
Smoking status	Nonsmoker	221 (75.9%)
	Smoker	70 (24.1%)
Physical activity	Yes	74 (25.4%)
	No	217 (74.6%)
Body mass index	Normal (<25kg/ m2)	57 (19.6%)
	Overweight (25–29.9kg/m2)	136 (46.7%)
	Obese (≥30kg/m2)	98 (33.7%)
Taking metformin	Yes	52 (17.9%)
	No	239 (82.1%)
Taking sulfonylurea	Yes	12 (4.1%)
	No	279 (95.9%)
Age
Mean ± SD	55.99 ± 9.81
Height (cm)
Mean ± SD	165.17 ± 10.16
Weight (kg)
Mean ± SD	82.93 ± 49.98
Body mass index (kg/m2)
Mean ± SD	30.51 ± 19.60
Serum calcium (mg/dL)
Mean ± SD	9.2 ± 0.5
Serum vitamin D (ng/mL)
Mean ± SD	19.5 ± 21

SD = standard deviation