Table 2. Sex-stratified comparison of smoking, and opium and alcohol consumption .

Variables		Men (n = 4286)			Women (n = 4988)
		FC (n = 286)	No FC (n = 3990)	P value	FC (n = 466)	No FC (n = 4521)	P value
Cigarette ever used	Yes	144 (50.3%)	1745 (43.8%)	0.032	8 (1.7%)	43 (1%)	0.12
	No	142 (49.7%)	2238 (56.2%)		458 (98.3%)	4471 (99%)
Non-cigarette tobacco ever used	Yes	95 (33.3%)	1136 (28.5%)	0.083	235 (50.4%)	2071 (45.9%)	0.063
	No	190 (66.7%)	2848 (71.5%)		231 (49.6%)	2440 (54.1%)
Opium ever used	Yes	98 (34.3%)	645 (16.2%)	< 0.001	2 (0.4%)	29 (0.6%)	0.56
	No	188 (65.7%)	3345 (83.8%)		464 (99.6%)	4492 (99.4%)
Alcohol consumption	Yes	17 (5.9%)	149 (3.7%)	0.062	2 (0.4%)	28 (0.6%)	0.61
	No	269 (94.1%)	3841 (96.3%)		464 (99.6%)	4493 (99.4%)

P was calculated by: X2 test and fisher exact test

CC: Chronic constipation, FC: Functional constipation