Crude and Adjusted Hazard Ratios of Contraceptive Discontinuation 100 Days Later (n=2,267)
| Models of Method Information Indicators | HR (95% CI) | AHRa (95% CI) |
|---|---|---|
| Model I: MII | ||
| <3 questions | Reference | Reference |
| All 3 questions | 0.59*** (0.42, 0.80) | 0.65* (0.47, 0.91) |
| Model II: MIIplus | ||
| <4 questions | Reference | Reference |
| All 4 questions | 0.48*** (0.33, 0.68) | 0.53*** (0.37, 0.76) |
| Model III: MIIplus variation | ||
| <3 questions of MII | 0.57 (0.31, 1.06) | 0.56 (0.30, 1.04) |
| MII | Reference | Reference |
| MIIplus | 0.28*** (0.14, 0.55) | 0.31*** (0.17, 0.61) |
Abbreviations: AHR, adjusted hazard ratio; CI, confidence interval; HR, hazard ratio; MII, Method Information Index; MIIplus, Method Information Index including the question, “Were you told about the possibility of switching to another method if the method you selected was not suitable?”
↵* P≤.05; **P≤.01; ***P ≤.001.
↵a Adjusted for age, education, religion, number of living children, previous modern method use, method selected at enrollment, and state.