Pre-March 2008 | Post-March 2008 | P value (interaction between ABC use and calendar period) | |||
---|---|---|---|---|---|
Sensitivity analysis | MI event rate (95 % CI)/100 PYRS | aRR (95 % CI) | MI event rate (95 % CI)/100 PYRS | aRR (95 % CI) | |
i) Stratified by Framingham risk | |||||
Low | 0.14 (0.12, 0.16) | 2.48 (1.74, 3.52) | 0.08 (0.06, 0.09) | 2.11 (1.12, 3.98) | 0.78 |
Moderate | 0.69 (0.59, 0.80) | 1.69 (1.21, 2.35) | 0.32 (0.26, 0.39) | 2.19 (1.25, 3.84) | 0.68 |
High | 1.80 (1.56, 2.05) | 1.51(1.12, 2.05) | 0.74 (0.58, 0.90) | 1.65 (0.93, 2.92) | 0.16 |
ii) Further adjustment for factors on causal pathway | n/a | 1.88 (1.55, 2.28) | n/a | 2.03 (1.46, 2.84) | 0.61 |