Pred   Effect Size            CI  Statistic     Pval
1  OPA      RR: 1.29  [1.07, 1.56]       2.64  0.017 *

Pred   Effect Size            CI  Statistic     Pval
1  OPA      RR: 0.99  [0.81, 1.22]     -0.109 0.915 ns
2  5.years  RR: 1.28   [1.1, 1.47]       3.42 0.003 **