Author/Authors :
Moss، نويسنده , , Arthur J. and Ryan، نويسنده , , Daniel and Oakes، نويسنده , , David and Goldstein، نويسنده , , Robert E. and Greenberg، نويسنده , , Henry and Bodenheimer، نويسنده , , Monty M. and Brown، نويسنده , , Mary W. and Case، نويسنده , , Robert B. and Dwyer Jr.، نويسنده , , Edward M. and Eberly، نويسنده , , Shirley W. and Francis، نويسنده , , Charles W. and Gillespie، نويسنده , , John A.، نويسنده ,
Abstract :
The association of a group of prespecified atherosclerotic risk genotypes with recurrent coronary events (coronary-related death, nonfatal myocardial infarction, or unstable angina) was investigated in a cohort of 1,008 patients after infarction during an average follow-up of 28 months. We used a carrier-ship approach with time-dependent survivorship analysis to evaluate the average risk of each carried genotype. Contrary to expectation, the hazard ratio for recurrent coronary events per carried versus noncarried genotype was 0.89 (95% confidence interval 0.80 to 0.99, p = 0.03) after adjustment for relevant genetic, clinical, and environmental covariates. This hazard ratio, derived from the 7 prespecified genotypes, indicated an average 11% reduction in the risk of recurrent coronary events per carried versus noncarried genotype. At 1 year after hospital discharge, the cumulative probability of recurrent coronary events was 26% in those who carried ≤1, 20% for those with 2 to 4, and 13% for those with ≥5 of these genotypes (p = 0.02). This unexpected risk reversal is a likely consequence of changes in the mix of risk factors in pre- and postinfarction populations. In conclusion, this under appreciated, population-based, risk-reversal phenomenon may explain the inconsistent associations of genetic risk factors with outcome events in previous reports involving coronary populations with different risk attributes.
