Table 4.

Impact of previous infections on G. duodenalis infection at the end of the trial

	n	Prevalence at final follow-up (95% CI)	Relative risk	95% CI	P-value
No infection at previous time points	1082	8.5 (7.0–10.3)	reference
Infection at one previous time point	254	26.3 (21.3–32.1)	2.05	1.47–2.86	< 0.001
Infection at two previous time points	90	53.3 (43.0–63.3)	3.81	2.62–5.56	< 0.001
Infection at three previous time points	26	53.8 (35.0–71.6)	3.88	2.13–7.07	< 0.001
Infection at four previous time points	12	66.7 (37.6–86.9)	5.55	2.55–12.10	< 0.001

Notes: Effect estimates obtained using generalised linear mixed models, adjusted for age group and sex (fixed effects) and clustering at the community and household levels (random effects). The model included 1464 individuals in 438 households in 23 communities. Results in bold text are those significant at P < 0.05

Abbreviation: CI, confidence interval