Ordinary least squares model estimates of treatment effects on postpartum receipt of modern contraception from study facility (administrative records)
| Treatment effects (% difference) | Use of any modern method | |
| Model 1 | Model 2 | |
| Panel A Short-term postpartum uptake of modern contraception, for N=686 study participants | ||
| Short message service (SMS) only | −0.02 (−0.13 to 0.09) | −0.01 (−0.12 to 0.10) |
| Standard voucher | −0.02 (− 0.09 to 0.05) | −0.02 (−0.09 to 0.05) |
| Standard voucher+SMS | 0.03 (−0.07 to 0.14) | 0.04 (−0.07 to 0.15) |
| Deadline voucher | 0.04 (−0.04 to 0.11) | 0.05 (−0.03 to 0.13) |
| Deadline voucher+SMS | 0.06 (−0.07 to 0.18) | 0.08 (−0.05 to 0.22) |
| Reference level (%) (no voucher, no SMS) | 0.13 | 0.13 |
| Panel B Medium-term postpartum uptake of modern contraception, for N=686 study participants | ||
| SMS only | −0.03 (−0.16 to 0.10) | −0.03 (−0.15 to 0.10) |
| Standard voucher | 0.03 (−0.06 to 0.12) | 0.05 (−0.04 to 0.14) |
| Standard voucher+SMS | 0.06 (−0.07 to 0.19) | 0.07 (−0.05 to 0.20) |
| Deadline voucher | 0.00 (−0.09 to 0.09) | 0.04 (−0.05 to 0.13) |
| Deadline voucher+SMS | 0.02 (−0.12 to 0.16) | 0.07 (−0.08 to 0.21) |
| Reference level (%) (no voucher, no SMS) | 0.21 | 0.21 |
OLS estimates are presented as risk differences (in proportions), with 95% CIs using robust SEs in italics and brackets. Model 1 includes only stratification variables. Model 2 includes stratification variables and controls for additional covariates described in the text. All treatment arms are compared with the standard of care arm (no voucher, no SMS) as the reference category. See table 1 notes for definition of modern and LARC contraception. Short-term and medium term are defined as 9 weeks and 22 weeks after EDD. See text and technical appendix for more detailed description of main outcomes.