Parameter	β	(95% CI)	RRCa	(95% CI)	P value
Intercept	−0.17	(−0.45 to 0.12)	0.85	(0.64 to 1.13)	0.25
Baseline Support	‐	‐	‐	‐	‐
Pharmacotherapy	0	Reference	1.00	Reference
Self‐help	0.30	(0.10 to 0.51)	1.35	(1.10 to 1.67)	< 0.01
Brief intervention	0.31	(0.05 to 0.58)	1.37	(1.05 to 1.79)	0.02
Incentives	−0.12	(−0.75 to 0.51)	0.89	(0.47 to 1.67)	0.71
Per each additional call	0.02	(−0.02 to 0.05)	1.02	(0.98 to 1.05)	0.29
Selected for motivation	‐	‐	‐	‐	‐
No	0.00	Reference	1.00	Reference	‐
Yes	0.23	(0.04 to 0.42)	1.26	(1.04 to 1.52)	0.02