The influence of in-pregnancy smoking cessation programmes on partner quitting and women's social support mobilization: a randomized controlled trial [ISRCTN89131885]

Table 2 The effects of trial arm on the difference in ISSB from baseline to outcome

	Arm A	Arm B		Arm C		Difference between arms
	Mean	Mean	Difference B-A (95%CI)	Mean	Difference C-A (95%CI)	χ², p*
Outcome at 30 weeks gestation
ISSB combined score	-0.13	-0.09	0.04 (-0.08–0.16)	-0.08	0.05 (-0.07–0.17)	0.77, 0.68
Guidance subscale	-0.12	-0.05	0.07 (-0.06–0.20)	-0.05	0.07 (-0.06–0.20)	1.42, 0.49
Emotional support subscale	-0.15	-0.15	0.00 (-0.16–0.15)	-0.18	-0.03 (-0.18–0.12)	0.16, 0.92
Tangible support subscale	-0.01	0.02	0.03 (-0.10–0.17)	-0.06	-0.05 (-0.18–0.08)	1.71, 0.43
Outcome at 10 days postpartum
ISSB combined score	0.09	0.10	0.01 (-0.12–0.14)	0.16	0.07 (-0.06–0.19)	1.27, 0.53
Guidance subscale	0.04	0.10	0.06 (-0.08–0.20)	0.12	0.08 (-0.06–0.22)	1.44, 0.49
Emotional support subscale	0.12	0.10	-0.02 (-0.19–0.14)	0.12	0.00 (-0.17–0.17)	0.10, 0.95
Tangible support subscale	0.10	0.08	-0.01 (-0.16–0.14)	0.15	0.05 (-0.10–0.21)	0.85, 0.65

ISSN: 1471-2458