Comparison of chlamydia re-testing by study group (per-protocol analysis)
| Not re-tested | Re-tested | Re-tested | p Value | |
| n | n | % (95% CI) | ||
| Group 1 controls (n=30) | 30 | 0 | 0 | |
| Group 2 SMS reminder (n=22) | 17 | 5 | 22.7 (8.8 to 43.4) | 0.010 |
| Group 3 SMS reminder and incentive (n=24) | 17 | 7 | 29.17 (12.6 to 51.1) | 0.002 |