Table 1.

Descriptive statistics for the full sample and during the first 3 months of baseline, by group

	Full sample	Group 1 baseline mean	Group 2 baseline mean	Difference (Group 2 mean − Group 1 mean)1
		First 3 months	First 3 months	First 3 months
Panel A
Woman’s age
< 20 years	0.051	0.049	0.051	0.002
20–24 years	0.232	0.227	0.226	− 0.001
25–29 years	0.325	0.32	0.315	− 0.005
≥ 30 years	0.393	0.404	0.408	0.004
Woman’s schooling
No schooling	0.007	0.007	0.009	0.002
Some primary	0.111	0.119	0.119	0
Some lower secondary	0.375	0.247	0.365	0.118*
Some higher secondary	0.247	0.355	0.277	− 0.078
Some college	0.259	0.272	0.23	− 0.042
Time taken to travel from home to hospital
< 1 h	0.505	0.575	0.476	− 0.099
1–3 h	0.44	0.375	0.451	0.076
≥ 3 h	0.055	0.05	0.073	0.023
Parity
1	0.385	0.378	0.369	− 0.009
2	0.377	0.377	0.373	− 0.004
3+	0.238	0.245	0.257	0.013
Ethnicity
Sinhalese	0.708	0.761	0.695	− 0.066
Sri Lankan Tamil	0.105	0.097	0.107	0.01
Indian Tamil	0.084	0.047	0.1	0.053
Sri Lankan Moor	0.1	0.093	0.091	− 0.002
Other	0.003	0.001	0.006	0.005
Male child born	0.513	0.507	0.518	0.011
Received ANC
Hospital	0.472	0.477	0.464	− 0.013
MOH clinic	0.817	0.936	0.738	− 0.198
Panel B
Received PPIUD counseling	0.349	0.233	0.079	− 0.153
Choice of PPIUD	0.07	0.127	0.015	− 0.112
N	39,084	3478	4180

***p < 0.01, **p < 0.05, *p < 0.1

¹Significance of difference tested using wild-cluster bootstrap method

Note: Balance table across baseline and intervention period shown in Additional file 1: Table S2. Balance table across baseline and intervention period in each hospital is shown in Additional file 1: Table S3