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Unweighted and Weighted Hazard Ratios Showing the Effect of Secondary Prophylaxis in the Early and Late Time Periods
| Time period | Unweighted | Weighted | ||
|---|---|---|---|---|
| HR (95% CI) | P Value | HR (95% CI) | P Value | |
| Early (0–6 weeks) | 0.22 (0.06–0.76) | .02 | 0.19 (0.05–0.69) | .01 |
| Late (6–52 weeks) | 1.51 (0.61–3.72) | .37 | 1.18 (0.46–2.99) | .73 |
Abbreviations: CI, confidence interval; HR, hazard ratio.
