Table 4.

Abstinence rates observed, unadjusted, age-adjusted and sex-adjusted and multivariable-adjusted ORs according to randomised assignment group (intention-to-treat analysis)

	Control	Intervention	Unadjusted	Age adjusted and sex adjusted	Multivariable adjusted
	(n=285)	(n=286)	OR (95% CI); p value	OR (95% CI); p value	OR (95% CI); p value
Point abstinence*
At 30 days	17 (5.96)	30 (10.49)	1.85 (1.03 to 3.46); 0.049	1.88 (1.01 to 3.50); 0.046	1.66 (0.82 to3.36); 0.157
At 6 months	40 (14.04)	42 (14.69)	1.05 (0.66 to 1.68); 0.825	1.01 (0.63 to 1.64); 0.957	1.00 (0.49 to 1.46); 0.760
At 12 months	34 (11.93)	57 (19.93)	1.84 (1.16 to 2.91); 0.008	1.88 (1.18 to 2.98); 0.008	1.79 (1.06 to 3.03); 0.031
Prolonged abstinence
For 6 months†	22 (7.72)	38 (13.29)	1.83 (1.05 to 3.18); 0.037	1.86 (1.07 to 3.23); 0.028	1.80 (0.99 to 3.26); 0.054
For 12 months‡	6 (2.11)	16 (5.59)	2.75 (1.06 to 7.15); 0.032	2.76 (1.07 to 7.18); 0.037	2.71 (1.04 to 7.29); 0.044

Data are presented as number of patients (%), OR, CI and p value.

Analyses were unadjusted, sex adjusted and age adjusted (continuous years), and adjusted by multiple variables: sex, age, civil status, social class, number of children, primary healthcare professional performing the intervention, primary healthcare setting, cardiovascular disease, body mass index, physical activity, alcohol intake categorisation, smoking cumulative consumption, nicotine dependence level (Fagerström test), motivation to quit smoking level (Richmond test), Prochaska and DiClemente model stage, baseline expired-CO values, accept a specific ‘quit smoking’ medical visit, intensive-motivational intervention and/or use of pharmacological treatment.

*This secondary end point was self-reported 7 days point-prevalence tobacco abstinence, confirmed by expired-CO level (<10 ppm).

†This secondary end point was self-reported prolonged abstinence during the 6 months prior to the end of the follow-up period, confirmed by expired-CO level (<10 ppm) at 30 days, 6 and 12 months.

‡This primary end point was self-reported prolonged abstinence during the 12 months prior to the end of the follow-up period, confirmed by expired-CO level (<10 ppm) at 6 and 12 months.