an obvious trendP = 0.056
For C5 -rs17611, there was an obvious trend towards lower proportions of G allele and GG homozygosity in DR patients than DM controls ( P = 0.056, OR = 0.79, 95% CI = 0.62–1.0; P = 0.009, P corr = 0.072, OR = 0.53, 95% CI = 0.33–0.86, resp.), but the associations either were marginal or could not remain after adjustment for multiple testing.