However, there was a significant inverse correlation between female gender and the prognostic value of MPO for both mortality (correlation coefficient -4.23, 95% CI: -7.88 to -0.59, P = 0.02) and recurrent MI (correlation coefficient -2.37, 95% CI: -4.69 to -0.03, P = 0.047) (Supplemental Figures 1 and 3). This evidence concerns the gene MPO and myocardial infarction.