HMGA2 and neoplasm: However, HMGA2 overexpression was not associated histological differentiation (RR =1.10, 95% CI = 0.94-1.30, P = 0.23, fixed-effects model), tumor size (RR =1.09, 95% CI = 0.92-1.30, P = 0.31, fixed-effects model) or sex (RR =1.02, 95% CI =0.82-1.27, P = 0.83, fixed-effects model).