Table 3 Case-series analysis for 4 year observation period
Risk Periods | Number of Hospitalisations | Person-Years | Adjusted age and study month only RR(95% CI) | Adjusted* RR(95% CI) |
|---|---|---|---|---|
Baseline unexposed Period | ||||
Unexposed | 13541 | 34944 | 1.00 (1.00 - 1.00) | 1.00 (1.00 - 1.00) |
Pre-exposure to a beta blocker for heart failure | ||||
6-8 weeks | 137 | 147 | 2.22 (2.00 - 2.45) | 2.24 (2.02 - 2.48) |
4-6 weeks | 237 | 148 | 3.79 (3.50 - 4.11) | 3.82 (3.52 - 4.14) |
2-4 weeks | 380 | 149 | 5.93 (5.54 - 6.34) | 5.92 (5.54 - 6.34) |
1 day-2 weeks | 872 | 150 | 13.04 (12.38 - 13.73) | 12.95 (12.29 - 13.63) |
Post-exposure to a beta blocker for heart failure | ||||
1 day-2 weeks | 190 | 149 | 2.75 (2.52 - 3.01) | 2.74 (2.51 - 3.00) |
2-4 weeks | 156 | 145 | 2.27 (2.06 - 2.50) | 2.27 (2.06 - 2.50) |
1-4 months | 488 | 734 | 1.71 (1.61 - 1.82) | 1.68 (1.58 - 1.79) |
4-8 months | 322 | 685 | 1.21 (1.12 - 1.30) | 1.18 (1.10 - 1.27) |
8-12 months | 212 | 535 | 0.93 (0.85 - 1.02) | 0.90 (0.82 - 0.98) |
>12 months | 458 | 1358 | 0.65 (0.60 - 0.70) | 0.61 (0.57 - 0.66) |