Table 3

Women's group attendance by socioeconomic and sociodemographic position (%) per trial and intervention year

	Mumbai, urban India trial	1st Bangladesh trial	2nd Bangladesh trial			Rural India trial			Nepal-Makwanpur trial		Nepal-Dhanusha trial				Malawi trial
Trial	Years 1–3	Years 1–3	Year 1	Year 2	Year 3	Year 1	Year 2	Year 3	Year 1	Year 2	Year 1	Year 2	Year 3	Year 4	Year 1	Year 2	Year 3	Year 4
Total	1	3	31	34	38	14	36	54	39	37	9	10	14	14	50	52	55	57
Maternal education, years schooling
Never went to school	1	3	33	38	40	13	36	55	38	37	9	10	13	14	48	52	59	60
1–4	2	3	35	37	43	17	34	60	39	39	9	11	15	16	53	54	57	58
5–10	1	2	27	32	33	15	35	53	44	40	10	12	16	14	51	52	52	55
11+	1	2	11	19	17	15	29	29	–	–	12	11	15	13	35	49	43	50
Household economic status
Poorest	1	3	36	38	44	10	32	52	38	34	11	11	13	16	47	49	55	55
Next poor	2	3	30	35	38	14	39	58	39	41	11	11	13	14	51	54	57	56
Middle	2	3	30	37	36	11	36	61	–	–	7	11	14	15	53	54	56	59
Next rich	1	3	28	34	41	20	33	52	45	39	8	10	16	16	51	54	54	58
Rich	1	2	24	26	29	15	34	32	34	39	6	8	13	11	42	49	51	43
Maternal age, years
<20	1	2	25	26	32	10	25	43	31	29	7	7	10	6	39	30	29	32
20–24	1	2	29	33	37	13	31	52	42	36	9	10	12	12	49	52	52	52
25–29	2	4	34	39	39	18	41	57	38	45	13	13	16	19	55	56	62	59
30–34	2	3	34	40	46	19	44	57	35	35	10	14	19	25	51	60	62	68
35+	2	3	35	37	38	13	42	56	41	31	8	13	23	18	54	59	66	69
Gravidity
First pregnancy	1	2	23	25	30	9	25	41	35	32	7	7	10	8	41	31	28	25
Not first pregnancy	2	3	34	39	41	15	40	59	40	38	11	12	16	17	53	58	61	63

Attendance (%) gives the percentage of women who had attended a women's group among those who recently delivered a baby.
Definition of intervention years per trial: Mumbai trial: Years 1–3: October 2006–September 2009. First Bangladesh trial: Years 1–3: February 2005–December 2007. Second Bangladesh trial: Year 1: January 2009–December 2009; Year 2: January 2010–December 2010; Year 3: January 2011–June 2011. Rural India trial: Year 1: August 2005–July 2006; Year 2: August 2006–July 2007; Year 3: August 2007–July 2008. Nepal-Makwanpur trial: Year 1: November 2001–October 2002; Year 2: November 2002–October 2003. Nepal-Dhanusha trial: Year 1: 14 April 2007–12 April 2008; Year 2: 13 April 2008–13 April 2009; Year 3: 14 April 2009–13 April 2010; Year 4: 14 April 2010–13 April 2011. Malawi trial: Year 1: May 2005–January 2006; Year 2: February 2006–January 2007; Year 3: February 2007–January 2008; Year 4: February 2008–January 2009. Year 1 includes 9 month run-in period in which the groups were formed but not all were fully established. These 9 months were excluded from the original trial paper. These 9 months were included in our analysis as several other sites also experienced some set-up issues in their first year, with late start or disruptions of women's groups in some clusters.