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A descriptive analysis of relations between parents' self-reported smoking behavior and infants' daily exposure to

Doris Kehl1, Jochen R Thyrian, Jan Lüdemann

  • 1Ernst-Moritz-Arndt-University Greifswald, Institute of Psychology, Department Health and Prevention, Greifswald, Germany. doris.kehl@uni-greifswald.de

BMC Public Health
|July 21, 2010
PubMed

Insights

Infants exposed to secondhand smoke indoors have higher cotinine-to-creatinine ratio (CCR) levels. Parental smoking location, infant gender, and age significantly impact infant smoke exposure, but daily CCR levels remained stable over seven days.

Area of Science:

  • Environmental Health
  • Pediatrics
  • Toxicology

Background:

  • Environmental tobacco smoke (ETS) exposure is a significant health concern for infants.
  • Urinary cotinine-to-creatinine ratio (CCR) is a biomarker for assessing ETS exposure.
  • Understanding factors influencing infant CCR is crucial for public health interventions.

Purpose of the Study:

  • To investigate the relationship between parental smoking behavior and infant's daily ETS exposure (measured by CCR).
  • To describe the daily variation of CCR in infants over a seven-day period.
  • To identify predictors of infant CCR, including parental smoking location, infant gender, and age.

Main Methods:

  • Convenience sampling of 27 households with at least one smoker and one child under three years old.
  • Daily urine sample collection from infants over seven consecutive days.
  • Generalized estimating equation (GEE) analysis to assess relationships between parental smoking and infant CCR.

Main Results:

  • Infants in households with indoor smoking exhibited higher CCR than those with outdoor smoking.
  • Higher CCR levels were observed in female infants compared to males.
  • Younger infants had higher CCR levels than older infants.
  • Parental smoking location, infant gender, and age explained 68% of the variance in CCR.

Conclusions:

  • Parental smoking location (indoor vs. outdoor) is a significant predictor of infant CCR.
  • Elevated CCR in female infants warrants further investigation.
  • No significant daily fluctuations in infant CCR were detected over the seven-day study period.
Abstract

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