Table 4

Outcome at 30 weeks of pregnancy

	Unadjusted				Adjusted
	Arm A	Arm B		Arm C		Difference between arms	Arm B	Arm C	Difference between arms
	% quitters	% quitters	OR (95%CI)	% quitters	OR (95%CI)	χ², p	OR (95%CI)	OR (95%CI)	χ², p
Self reported smoking
Sustained quit since 20 weeks gestation
All followed up	5.5	7.6	1.41 (0.61 to 3.27)	5.4	0.98 (0.41 to 2.34)	1.0, 0.58	1.16 (0.45 to 2.96)	0.88 (0.32 to 2.42)	0.4, 0.83
All non-dropouts	4.1	6.6	1.63 (0.70 to 3.77)	4.8	1.16 (0.48 to 2.81)	1.5, 0.47	1.25 (0.50 to 3.12)	1.09 (0.41 to 2.93)	0.2, 0.88
All	3.1	5.2	1.72 (0.75 to 3.96)	4.0	1.30 (0.55 to 3.09)	1.7, 0.43	1.46 (0.50 to 4.27)	1.35 (0.43 to 4.18)	0.5, 0.78
Point prevalence quit
All followed up	6.4	10.3	1.69 (0.74 to 3.82)	10.4	1.69 (0.76 to 3.75)	1.9, 0.38	1.48 (0.60 to 3.68)	1.73 (0.69 to 4.30)	1.4, 0.50
All non-dropouts	5.1	8.6	1.77 (0.83 to 3.77)	9.6	1.98 (0.95 to 4.15)	3.4, 0.18	1.49 (0.65 to 3.40)	2.12 (0.92 to 4.87)	3.1, 0.21
All	3.7	7.1	2.01 (0.91 to 4.44)	7.7	2.21 (1.02 to 4.78)	4.3, 0.12	1.85 (0.78 to 4.39)	2.39 (1.01 to 5.67)	4.0, 0.14
Cotinine confirmed
Sustained quit since 20 weeks gestation
All followed up	2.4	3.8	1.57 (0.46 to 5.30)	4.1	1.72 (0.53 to 5.59)	0.8, 0.66	1.30 (0.34 to 4.96)	1.89 (0.49 to 7.28)	0.9, 0.62
All non-dropouts	1.8	3.3	1.81 (0.54 to 6.11)	4.0	2.21 (0.68 to 7.15)	1.8, 0.42	1.51 (0.41 to 5.60)	2.43 (0.65 to 9.07)	1.8, 0.40
All	1.4	2.6	1.92 (0.57 to 6.44)	3.1	2.27 (0.70 to 7.31)	1.9, 0.39	1.77 (0.49 to 6.38)	2.62 (0.74 to 9.25)	2.3, 0.33
Point prevalence quit
All followed up	3.1	6.1	2.08 (0.73 to 5.95)	7.4	2.55 (0.93 to 7.02)	3.3, 0.19	1.60 (0.51 to 5.06)	2.80 (0.90 to 8.73)	3.5, 0.17
All non-dropouts	2.3	4.9	2.20 (0.76 to 6.36)	7.2	3.27 (1.20 to 8.97)	5.4, 0.066	1.77 (0.57 to 5.48)	3.76 (1.23 to 11.48)	6.1, 0.047
All	1.7	4.3	2.53 (0.89 to 7.19)	5.6	3.34 (1.22 to 9.11)	5.5, 0.062	2.03 (0.68 to 6.11)	3.45 (1.17 to 10.14)	5.3, 0.072