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Attendance rates by intervention types
| Intervention | AR (%) | P-value | OR (95% CI) |
| SMS vs control | 87.5 vs 80.5 | 0.001 | 1.698 (1.224~2.316) |
| Telephone vs control | 88.3 vs 80.5 | <0.001 | 1.829 (1.333~2.509) |
| SMS vs telephone | 87.5 vs 88.3 | 0.670 | 0.928 (0.659~1.308) |
AR: Attendance rate; OR: Odds ratio; CI: confidence interval
