Table II.

Environmental characteristics frequencies and associations with Toxoplasma gondii infection of 1,217 studied children. Abbreviations: OR, odds ratio; CI, confidence interval.

	Toxoplasma gondii infection 213 (17.5%)
Variables	n	%	OR (95% C.I.)†	Final model OR (95% C.I.)‡
Flies at home
No or rare (n = 603)	101	16.7	1	—
Yes (n = 614)	112	18.2	1.11 (0.83; 1.49)
Rodents at home
No (n = 525)	85	16.2	1	—
Yes (n = 692)	128	18.5	1.18 (0.87; 1.59)
Cat at home
No (n = 1002)	163	16.3	1	1
Yes (n = 215)	50	23.3	1.56 (1.09; 2.23)*	1.54 (1.06; 2.24)*
Dog at home
No (n = 735)	116	15.8	1	—
Yes (n = 482)	97	20.1	1.34 (1.00; 1.81)
Paved road (1997–2003 and 2005)
Both study periods (n = 335)	72	21.5	1	—
One study period (n = 395)	65	16.5	0.72 (0.50; 1.04)*
Never (n = 487)	76	15.6	0.68 (0.47; 0.97)*
Piped water (1997–2003 and 2005)
Both study periods (n = 974)	151	15.5	1	1
One study period (n = 207)	49	23.7	1.69 (1.17; 2.43)*	1.38 (0.93; 2.05)
Never (n = 36)	13	36.1	3.08 (1.53; 6.22)*	2.54 (1.22; 5.31)*
Flush toilet
Yes (n = 761)	106	13.9	1	1
No (n = 456)	107	23.5	1.89 (1.41; 2.55)*	1.45 (1.04; 2.01)*
Sewage system
Yes (n = 1016)	179	17.6	1	—
No (n = 201)	34	16.9	0.95 (0.64; 1.42)
Open sewage nearby
No (n = 646)	93	14.4	1	—
Yes (n = 571)	120	21	1.58 (1.17; 2.13)*
Rubbish collection
≥once per week (n = 924)	149	16.1	1	—
<once per week (n = 293)	64	21.8	1.45 (1.05; 2.02)*
Flooded house
No (n = 842)	145	17.2	1	—
Yes (n = 375)	68	18.1	1.07 (0.78; 1.46)

^*p < 0.05.

^†Odds ratio and 95% confidence interval from crude analysis.

^‡Adjusted for all variables which has kept the significance in the multivariable analyses, including sex and age as a priori confounders.