Table 2.

Distribution of harmful habits according to N₂O use; comparisons between N₂O users and non-users were made by bivariate test (chi-square) and multivariate test (multivariate logistic regression). (*) not retained for the multiple logistic regression (p > 0.20). (§) not in the final model after stepwise multiple logistic regression.

Variable	Never Used N2O		N2O Users		Bivariate Test	Multivariate Test
	n	%	n	%	p-Value	p-Value (OR)
Divert medicinal products for recreational use					0.0001	0.002 (5.19)
No	134	96.4	338	74.4
Yes	5	3.6	116	25.6
Ever use antidepressants					0.26	(*)
No	128	92.1	403	88.8
Yes	11	7.9	51	11.2
Tobacco consumption					0.0001	0.88 (§)
Never	118	84.9	272	59.9
Sometimes	11	7.9	109	24.0
Frequently	4	2.9	24	5.3
Daily	6	4.3	49	10.8
Alcohol consumtion					0.0001	0.0001 (2.48)
Never	33	23.7	14	3.1
Sometimes	93	66.9	272	59.9
Frequently	13	9.4	162	35.7
Daily	0	0	6	1.3
Coffee consumtion					0.001	0.54(§)
Never	49	35.3	118	26.0
Sometimes	38	27.3	85	18.7
Frequently	21	15.1	65	14.3
Daily	31	22.3	186	41.0
Cannabis consumtion					0.0001	0.88 (§)
Never	123	88.5	311	68.5
Sometimes	16	11.5	124	27.3
Frequently	0	0	11	2.4
Daily	0	0	8	1.8