Table 2. Multivariable weighted logistic regression models of factors associated with gastroenteritis in children, stratified by age groups.

	0–4 years (n = 493)			5–17 years (n = 1,296)
	N (%GE)a	ORa	95%CI	N (%GE)	ORa	95% CI
Other children in household
None	146 (10)	Ref		171 (6)	Ref
0y	63 (23)	3.2	1.2–8.7	25 (9)	0.8	0.2–3.4
1-2y	71 (16)	2.0	0.8–4.7	37 (13)	1.0	0.3–3.5
3-12y	214 (14)	1.3	0.7–2.4	655 (7)	0.8	0.4–1.6
13-18y	7 (4)	0.8	0.1–7.3	408 (4)	0.6	0.2–1.6
Out-of-house careb		-			1.7	0.8–3.7
Location of residence
Rural	177 (18)	Ref		490 (7)	Ref
Intermediate	303 (17)	1.0	0.6–1.6	882 (7)	0.9	0.6–1.5
Urban	42 (10)	0.2	0.1–0.9	67 (3)	0.4	0.1–1.9
Comorbidities
Cancer	1 (0)			3 (0)
Food allergy	14 (2)			35 (7)
Immune disorderc	1 (0)			6 (33)	8.4	1.5–47
Asthma	2 (100)	n.c.		12 (27)	8.1	2.3–29

^aStandardized by gender, age (five-year age groups) and location of residence (urban, intermediate, rural).

^bDay-care, kindergarten or guest parent attendance of other children in the household

^cE.g. Guillain Barre Syndrome, Grave’s disease, Addison’s disease, sarcoidosis

GE: gastroenteritis, OR: odds ratio, 95% CI: 95% confidence interval, n.c.: non calculable