Table 4

Effect of the text message reminders on primary and secondary outcomes: treatment-on-the-treated analysis

Clinic visit (primary)0.036 (−0.005 to 0.076), p=0.083
N3468
Clinic visit within 1 month (secondary)0.058 (0.019 to 0.098), p=0.004
N3468
Received contraceptive method (secondary)0.035 (−0.006 to 0.077), p=0.092
N3460
Days between promoter visit and clinic visit−1.993 (−3.478 to −0.507), p=0.009
N1779
  • This table reports estimated risk differences corresponding to the effect of receipt of a full set of eight text messages for the full sample, using a two-stage least squares analysis in which receipt of text messages is instrumented by treatment assignment. Eight phone numbers are missing data for method choice that would allow us to identify contraceptive receipt. Days between promoter visit and clinic visit are coded as missing for women who never reported a clinic visit. Each cell reports the coefficient and 95% CI, and p value and the number of observations.