Table 1.

Characteristics and comparison of demographic features between opium users and non-users

variable	subgroup	User (N = 197) Mean ± SD or frequency (percent)	Nonuser (n = 487) Mean ± SD or frequency (percent)	p-value*
gender	men	162(82.2)	174(35.7)	0.001
	women	35(17.8)	313(64.3)
age		53.61 ± 9.33	54.12 ± 10.0	0.539
BMI	normal	98(49.7)	178(36.6)	0.006
	Over weight	67(34)	212(43.5)
	obese	32(16.2)	97(19.9)
Diabetes	yes	57(28.9)	145(29.8)	0.827
	no	140(71.1)	342(70.2)
Cardiac	yes	89(45.2)	197(40.5)	0.256
	no	108(54.8)	290(59.5)
MI	yes	56(28.4)	87(17.9)	0.002
	no	141(71.6)	400(82.1)

* The significant level of independent T-test and Chi-square test was considered P-value < 0.05