of borderline significanceP = 0.06
This difference was statistically significant with the fixed effect model (Mantel-Haenszel RR; 1.55; 95% CI, 1.06–2.28; P = 0.02, and of borderline significance with the random effect model (Mantel-Haenszel RR; 1.51; 95% CI, 0.98–2.33; P = 0.06).