The relationship between second-hand smoke and wheezing in infants from Córdoba, Argentina

Main Article Content

A. Teijeiro
M.N. Cuello
M.G. Raiden
R.E. Vieyra
D. Solé
P. Ellwood
R.M. Gomez

Keywords

Second-hand smoke, Wheezing, Infants, Health survey

Abstract

Background: Wheezing constitutes a common respiratory symptom in children, and several risk factors have been associated with the prevalence of recurrent wheezing (RW) and its severity, especially viral respiratory infections and second-hand smoke (SHS) exposure.


Objective: To analyze the relationship between smoking patterns in the home and wheezing, in infants from the city of Córdoba, Argentina, during their first year of life.


Methods: Parents of infants were invited to complete a standardized questionnaire voluntarily and anonymously (WQ-P1-EISL). Wheezing in the first 12 months of life was classified as occasional wheezing (OW) when having one or two episodes during the first 12 months of life; recurrent wheezing (RW) if having three or more, and more frequent wheezing (MFW) ≥6 episodes.


Results: 409 infants (39.0%) had one or more episodes of wheezing in the first 12 months. Of these, 214 infants (52.3%) presented occasional wheezing (OW), 135 (33%) had recurrent wheezing (RW), and 60 (14.7%) more frequent wheezing (MFW). SHS was significantly related to MFW, especially if the mother smoked (OR = 2.7; IC 95%: 1.4-5.18; p = 0.0009) or if she smoked during pregnancy (OR = 4; IC 95%: 1.8-8.5; p = 0.0001). This group of MFW was also associated with SHS as well as having been to the emergency room for wheezing (40.87%, p = 0.0056).


Conclusion: The results indicate that second-hand tobacco smoke is a significant risk factor for the presence of wheezing in infants, and for its severity. Our findings have significant implications for public health, as smoking is a modifiable behavior.

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