Table 4. Analysis of the Relationship of β-tubulin Genotype with Patient and Parasitological Independent Variables After Treatment.

N = 98 female worms	OR	95% CI	p
150 µg/kg three-monthly	2.22	0.39–12.65	0.370
800 µg/kg yearly	0.93	0.22–3.94	0.923
800 µg/kg three-monthly	1.68	0.23–12.15	0.609
Age of patient	1.00	0.94–1.04	0.691
No. females/nod	0.83	0.57–1.23	0.356
CMFL 41–60 mf/ss	6.24	1.09–35.59	0.039
CMFL 61–70 mf/ss	4.44	0.91–21.54	0.065
CMFL 71–114 mf/ss*	-	-	-
No. nod. 1994	0.88	0.68–1.13	0.305

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.