Table 2

Zero inflated negative binomial estimates for smoking status (logistic process)

Variable	All				Boys				Girls
	95% CI				95% CI				95% CI
	OR	P value	Low	High	OR	P value	Low	High	OR	P value	Low	High
Visibility teacher smoking
Daily	2.09***	0.00	1.82	2.39	1.84***	0.00	1.51	2.23	2.41***	0.00	1.99	2.92
Most days	1.64***	0.00	1.35	2.00	1.60**	0.00	1.20	2.15	1.68***	0.00	1.29	2.19
Half of the days	1.30*	0.02	1.04	1.64	1.20	0.34	0.83	1.73	1.40*	0.02	1.05	1.86
Less than half days	0.98	0.84	0.81	1.18	0.88	0.37	0.66	1.17	1.08	0.52	0.85	1.38
Never (reference category)
Friends smoke	20.82***	0.00	13.93	31.13	20.70***	0.00	12.14	35.29	20.31***	0.00	11.30	36.51
Mother smokes	1.59***	0.00	1.41	1.80	1.42***	0.00	1.18	1.70	1.75***	0.00	1.49	2.06
Father smokes	1.64***	0.00	1.45	1.85	1.81***	0.00	1.51	2.17	1.51***	0.00	1.28	1.77
School type (public)	0.91	0.15	0.80	1.03	0.93	0.41	0.77	1.11	0.90	0.22	0.75	1.07
School programme	0.82**	0.00	0.71	0.93	0.81*	0.03	0.67	0.98	0.83*	0.04	0.69	0.99
Male	0.77***	0.00	0.69	0.86	—				—
Age 14 (reference category)
Age 15	2.04***	0.00	1.60	2.60	2.41***	0.00	1.65	3.51	1.85***	0.00	1.34	2.55
Age 16	2.64***	0.00	2.09	3.34	3.05***	0.00	2.12	4.38	2.41***	0.00	1.77	3.30
Age 17	3.59***	0.00	2.84	4.53	4.73***	0.00	3.31	6.76	2.93***	0.00	2.15	4.00
Age 18	5.06***	0.00	3.92	6.51	6.11***	0.00	4.18	8.93	4.54***	0.00	3.21	6.41
Immigrant	0.81*	0.03	0.66	0.98	0.95	0.72	0.72	1.26	0.67**	0.00	0.52	0.88
Income	1.01***	0.00	1.01	1.01	1.01***	0.00	1.00	1.01	1.01***	0.00	1.01	1.02
Working mother	1.05	0.39	0.94	1.18	1.04	0.65	0.88	1.24	1.07	0.43	0.91	1.25
Working father	0.81*	0.01	0.69	0.95	0.87	0.29	0.68	1.12	0.77*	0.01	0.63	0.94
Retired mother	0.97	0.89	0.58	1.60	1.34	0.44	0.64	2.83	0.73	0.35	0.38	1.41
Retired father	0.91	0.53	0.67	1.23	0.96	0.87	0.61	1.52	0.87	0.54	0.57	1.34
Bad relations mother	2.00***	0.00	1.45	2.76	1.98*	0.01	1.15	3.43	2.18***	0.00	1.48	3.22
Bad relations father	1.46**	0.00	1.16	1.85	0.97	0.87	0.63	1.47	1.94***	0.00	1.46	2.56
Intercept	0.00***	0.00	0.00	0.01	0.00***	0.00	0.00	0.01	0.00***	0.00	0.00	0.01
N° Observations	19 382				9576				9626
N° of zeros	16 233				8318				7915

Sampling weights have been taken into account with the ‘ svyset ’ and ‘ svy ’ commands.
*P<0.05; **P<0.01; ***P<0.001.