Table 5.

Multivariate analysis of risk factors associated with cholera illness in Carrefour, Haiti 2011

	Univariate analysis			Multivariate analysis
	OR	95% CI	P value	OR	95% CI	P value
Sharing latrine with someone suffering from diarrhoea†	3·8***	1·8–8·1	<0·001	3·2*	1·3–7·7	0·011
Using untreated water for washing dishes	3·0**	1·5–6·2	0·002	3·2**	1·4–7·3	0·006
Ate a meal away from home at least once in week before illness	2·5**	1·4–4·5	0·001	1·8	0·9–3·7	0·117
Presence of E. coli in drinking water stored at home	0·8	0·4–1·7	0·582	1·5	0·5–4·3	0·489
Chlorine level >0·2 mg/l in drinking water stored at home	1·1	0·6–1·9	0·845	1·0	0·5–2·4	0·920
Receiving information on cholera prevention via television	0·4**	0·2–0·7	0·002	0·4**	0·2–0·9	0·027
Receiving information on cholera prevention at church	0·2*	0·1–0·8	0·027	0·1**	0·0–0·5	0·003
Socioeconomic score	0·4***	0·3–0·6	<0·001	0·5**	0·3–0·8	0·002

OR, Odds ratio; CI, confidence interval.

^†Two other variables measuring contacts with suspected cholera cases (visiting someone suffering from cholera and caring for someone suffering from diarrhoea or cholera) were collinear with sharing the latrines with someone suffering from diarrhoea. We built separate models replacing sharing the latrines with these two variables; the odds ratios were 3·7 (95% CI 1·2–11·9) for visiting someone suffering from cholera and 3·8 (95% CI 1·5–9·5) for caring someone suffering from diarrhoea or cholera.

^*P < 0·05; ** P < 0·01; *** P < 0·001 (two-tailed tests).