marginal significanceP = 0.065
For the SLCO1B1 521T > C genotypes, in male patients, the risk of enalapril-induced cough in SLCO1B1 521C allele carriers was higher compared with TT genotype carriers, with marginal significance (OR = 2.06, 95%CI = 0.92–4.62 , P = 0.065), while female patients were still strongly associated with SLCO1B1 521T > C genotypes distribution (OR = 2.04, 95%CI = 1.16–3.60, P = 0.012).