Table 5.

Association between Faecal Water Quality Indicators with Background Counts Less than 150 cfu/100ml and AGII

Exposure	No AGII	AGII	Odds Ratio (95% CI)*
E. coli
0 cfu/100 ml	433	40
1+ cfu/100 ml	12	4	2.85 (0.97–8.39)
Total Coliform
< 6 cfu/100 ml	423	42
6+ cfu/100 ml	32	2	0.32 (0.03–4.08)
Total Coliform
0 cfu/100 ml	332	29
1+ cfu/100 ml	123	15	1.77 (0.94–3.30)

^*Adjusted for age and number of years at current residence. AGII is acute gastrointestinal illness for specific defination, see methods