Table 1.

Time to first E.coli event
		N	N1	Total follow-up time (days)	Rate (100 person-month)	Rate ratio 95% CI	P=value
Overall	Control	17	8	1903	12.78	1.00	0.70
	1 capsule	20	8	1817	13.38	1.04 (0.34–3.20)
	2 capsules	19	12	1972	18.49	1.44 (0.54–4.06)
History of UTI	Control	9	3	638	14.29	1.00	0.27
	1 capsule	12	3	1088	8.38	0.59 (0.08–4.38)
	2 capsules	12	6	1251	14.58	1.02 (0.22–6.30)
No History of UTI	Control	8	5	1265	12.02	1.00	0.14
	1 capsule	8	5	729	20.85	1.74 (0.40–7.54)
	2 capsules	7	6	721	25.30	2.10 (0.54–8.72)
Time to first urine culture with any organism >100,000 cfu/ml
		N	N1	Total follow-up time (days)	Rate (100 person-month)	Rate ratio 95% CI	P=value
Overall	Control	17	12	1488	24.51	1.00	0.71
	1 capsule	20	13	1453	27.20	1.11 (0.47–2.66)
	2 capsules	19	14	1890	22.51	0.92 (0.39–2.17)
History of UTI	Control	9	5	428	35.51	1.00	0.15
	1 capsule	12	6	872	20.92	0.59 (0.15–2.44)
	2 capsules	12	8	1169	20.80	0.59 (0.17–2.28)
No History of UTI	Control	8	7	1060	20.07	1.00	0.27
	1 capsule	8	7	581	36.63	1.82 (0.55–6.10)
	2 capsules	7	6	721	25.30	1.26 (0.35–4.38)