Table 6.

Clinical relevance of the results

	Positive cotinine urine test
	3 months	6 months	9 months	12 months	12 months 95% CI
Smoking rates
Intervention Group	71.2%	69.5%	60.3%	53.4%
Control Group	79.4%	76.2%	69.8%	74.2%
p value	0.294	0.405	0.273	0.018
Clinical relevance
RR	0.90	0.91	0.85	0.72	0.54-0.96
RRR	0.10	0.09	0.15	0.28	0.04-0.46
ARR	0.08	0.07	0.11	0.20	0.04-0.37
NNT	12.23	14.93	9.51	4.88	2.68-27.28

RR: relative risk

RRR: relative risk reduction

ARR: absolute risk reduction

NNT: number needed to treat