Table 4. Risk factors associated to recurrent wheezing in evaluated infants. Pernambuco, Northeastern Brazil, 2013.

Risk factor	Wheezing infants		Non-wheezing infants		p
	n	%	n	%
Day care attendance	8	12.3	7	14.6	0.725
Dust accumulators	53	81.4	41	85.4	0.586
Mold at home	27	41.5	21	43.8	0.814
Cockroaches at home	46	70.8	36	75.0	0.618
Pets	18	27.7	22	45.8	0.046
Smoking during pregnancy	6	9.2	5	10.4	> 0.999
Passive smoking	17	26.2	19	39.6	0.130
Exposure to smoke	39	60.0	17	35.4	0.010
Caesarean section	36	55.4	20	41.7	0.149
EB ≥ 6 months	19	29.2	20	41.7	0.169
Repeated URI	48	73.8	31	64.6	0.289

EB: exclusive breastfeeding; URI: upper respiratory tract infection