Evaluating the efficacy of point-of-use water filtration units in Fiji

Table 2 Diarrhea prevalence by household at baseline and follow-up separated by days between measurements

Aggregation	Timing	Prevalence	Odds ratio (95% confidence interval (CI))	Adjusted odds ratio (95% CI)⁴
Household¹	Baseline	17.5% (88/503)	11.6 (5.7, 23.7)***	14.8 (6.9, 32.0)***
Household¹	Follow-up	1.8% (9/503)	1.0	1.0
Households followed up within 60 days²	Baseline	17.3% (63/364)	10.7 (4.7, 24.0)***	14.4 (5.9, 35.1)***
Households followed up within 60 days²	Follow-up	1.9% (7/364)	1.0	1.0
Households followed up after 60 days³	Baseline	18.0% (25/139)	15.0 (3.4, 66.8)***	56.3 (1.9, 1,653.5)*
Households followed up after 60 days³	Follow-up	1.4% (2/139)	1.0	1.0

*p < 0.05; **p < 0.01; ***p < 0.001
¹Summarized as whether anyone in the household experienced diarrhea within the previous 2 weeks
²Summarized as household being visited within 60 days of baseline intervention and whether anyone in the household experienced diarrhea within the previous 2 weeks
³Summarized as household being visited after 60 days of baseline intervention and whether anyone in the household experienced diarrhea within the previous 2 weeks
⁴Adjusted for all variables in Table 1 plus an indicator variable for whether the water source changed, an indicator variable for whether the person answering the survey questions changed, and a variable indicating any change in the number of adults in the household

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