Analysis of the Relationship of β-tubulin Genotype with Patient and Parasitological Independent Variables After Treatment.

Odds ratios (OR) and 95% confidence intervals (95% CI.) for logistic regression of heterozygote status (vs. homozygote) of worms collected after ivermectin treatment on five independent variables. No. females/nod. = total number of females in the nodule; No. nod. 1994 = total number of palpable nodules in 1994; CMFL = Community Microfilarial Load (reference category: 10–40 microfilariae per skin snip (mf/ss)). Reference category for treatment group: 150 µg/kg yearly.*All worms from villages with CMFL 71–114 mf/ss were heterozygotes; consequently, the highest CMFL category was not used for the estimation of other independent variables.