Risk Factors for Asthma in a Helminth Endemic Area in Bahia, Brazil

Table 1

Frequency of S. mansoni infection according to the level of exposure.

	S. mansoni		Univariate analysis		Multivariate analysis
	Positive	Negative	OR (95% CI)	𝑃	OR (95% CI)	𝑃
Level of exposure
No contact	26 (29.5%)	62 (70.5%)	1.00		1.00
Low	62 (55.9%)	49 (44.1%)	2.18 (1.13−4.22)	0.021	2.56 (1.22−5.34)	0.013
Medium	38 (67.9%)	18 (32.1%)	3.17 (1.41−7.15)	0.005	2.67 (1.11−6.42)	0.028
High	107 (70.9%)	44 (29.1%)	4.00 (2.11−7.61)	<0.001	3.64 (1.81−7.29)	<0.001

Note: Multivariate analysis adjusted by age, gender, and number of stool samples analyzed.