Behavioral trait (not exclusive)	Mild activity (n = 220)		Moderate activity (n = 259)		Vigorous activity (n = 21)		Test statistic p-value
Behavioral trait (not exclusive)	No.	%	No.	%	No.	%	Test statistic p-value
Smoking (n = 131)	76/131	58.0	54/131	41.2	1//131	0.8	X²(df = 2) = 15.53 p < 0.001
Non-smoking (n = 369)	144^*	65.4	205^†	79.1	20^‡	95.2
Total (n = 500)	220	44.0	259	51.8	21	4.2
Drug abuse (n = 14)	13/14	92.9	1/14	7.1	0/14	0.0	X²(df = 2) = 13.96 p < 0.001
No Drug abuse (486) Total (n = 500)	207^* 220	94.1 44.0	258^† 259	99.6 51.8	21^‡ 21	100.0 4.2	X²(df = 2) = 13.96 p < 0.001
Alcohol (n = 5)	5/5	100.0	0/5	0.0	0/5	0.0	Fisher’s exact = 6.3 p < 0.045
Non alcoholic (n = 495) Total (n = 500)	215^* 220	97.7 44.0	259^† 259	100.0 51.8	21^‡ 21	100.0 4.2	Fisher’s exact = 6.3 p < 0.045