Table 3.

Incidence of diarrhea, infection, and symptomatic infection by tertile

	Incidence of episodes per child-day in a low-income community (number of episodes/424,322 child-days of diarrhea surveillance)			P
	Low tertile	Middle tertile	High tertile
Diarrhea	0.00609	0.00634	0.00556	0.45
Infections with parasites
Microsporidia	0.00020	0.00012	0.00010	0.06
Cyclospora	0.00058	0.00054	0.00054	0.87
Cryptosporidium	0.00038	0.00051	0.00040	0.21
Giardia	0.00389	0.00282	0.00215	< 0.01
Infections with associated diarrhea
Microsporidia	0.00006	0.00027	0.00056	0.39
Cyclospora	0.00020	0.00021	0.00017	0.73
Cryptosporidium	0.00015	0.00019	0.00084	0.08
Giardia	0.00091	0.00062	0.00043	< 0.01