TABLE 1.

Prevalence of Dientamoeba fragilis in children attending day care centers in Copenhagen, Denmark, by selected plausible risk factors

Description	Total no.a	Positive		95% CIb	P value
		No.	%
>3 years old	66	53	80.3	69.4–88.6	<0.01c
≤3 years old	72	41	56.9	45.3–68.0
Male	78	51	65.4	54.4–75.3	0.42
Female	64	46	71.9	60.0–81.8
At least one sibling	97	71	73.2	63.7–81.3	0.03c
No siblings	38	20	52.6	36.9–68.0
Domestic animals at home	33	20	60.6	43.4–76.1	0.33
No domestic animals at home	103	72	69.9	60.5–78.2
History of infant colic	14	9	64.3	37.6–85.6	0.76
No history of infant colic	126	86	68.3	59.8–75.9
History of antibiotic intake or treatmentd	28	19	67.9	49.1–83.1	0.99
No history of antibiotic intake or treatmentd	109	74	67.9	58.7–76.1
History of travel abroadd	27	22	81.5	63.6–92.9	0.09
No history of travel abroadd	112	72	64.3	55.1–72.8
Total	142	97	68.3	60.3–75.6

^aData for all risk factors were not available for all of the children.

^bCI, confidence interval (MidP Exact) of the prevalence.

^cStatistically significant difference (MidP Exact, two-tailed P < 0.05).

^dHistory from the previous 2 months.