TABLE 3.

Incidence of Highly Credible Gastroenteritis Defined by Diarrheal Events During Water Treatment Intervention: Adelaide and Mount Barker, Australia, 2007–2008

	All Participants		Children Aged ≤ 5 Years
No. of Diarrheal Events	Active Group (n = 638), No. Persons (%)	Sham Group (n = 609), No. Persons (%)	Active Group (n = 81), No. Persons (%)	Sham Group (n = 90), No. Persons (%)
0	533 (83.5)	502 (82.4)	62 (76.5)	68 (75.6)
1–2	101 (15.8)	100 (16.4)	16 (19.8)	20 (22.2)
3–5	4 (0.63)	7 (1.1)	3 (3.7)	2 (2.2)

Note. Highly credible gastroenteritis defined by diarrheal events was characterized by 3 or more loose stools in a 24-hour period, regardless of other symptoms. The active group received water treatment units containing filters for their rainwater. The sham group received water treatment units that were identical to the active units, except that they did not contain filters. Investigators and participants were blinded to the identity of the active and sham households.