Overall effect estimates for prostate cancer and statin use according to study characteristics.

PSA, Prostate specific antigen; BMI, Body mass index; ALS, Adverse life style; RR, Relative risk; CI, Confidence interval; d.f., Degree of freedom.*Relative risk from fixed-effects model due to no heterogeneity among the studies;†P value representing significant inverse association between statin use and prostate cancer;‡Statistically significant for homogeneity;§Test of interaction was not statistically significant;∥Statistically significant for no publication bias.