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Effect of parental smoking on cotinine levels in newborns
  1. Desaline Veronica Joseph (dvj1{at}
  1. University of Leicester, United Kingdom
    1. Judith Ann Jackson (judith.jackson{at}
    1. University of Warwick, United Kingdom
      1. Jennifer A Westaway (jaw22{at}
      1. University of Leicester, United Kingdom
        1. Nick A Taub (nat2{at}
        1. University of Leicester, United Kingdom
          1. Stewart A Petersen (sxp{at}
          1. University of Leicester, United Kingdom
            1. Michael P Wailoo (mw33{at}
            1. University of Leicester, United Kingdom


              Background: Smoking is a major risk factor for cot death. Many infants smoke passively as a result of parental smoking. We report on infants exposed to a smoking environment and how they accumulate metabolites of cigarette smoke, such as cotinine, which may be physiologically harmful.

              Aim: To assess cotinine levels in infants of smoking parents.

              Method: 104 infants, of whom 71 were of smoking parents and 33 non-smoking, were assessed for cotinine excretion in urine. All cotinine levels were measured at approximately 12 weeks of age. The subjects were selected from a database of infants in developmental physiological studies, which assessed the impact of various factors on early postnatal development.

              Results: On average babies with at least one parent who was a current cigarette smoker excreted 5.58 (95%CI: 3.4 to 9.5) times as much cotinine in the urine as did the babies of non-smoking parents. Maternal smoking was the largest contributing component. Co sleeping and the minimum room temperature were significant contributory factors.

              Conclusion: Infants from smoking households, accumulate cotinine, a metabolite of nicotine, which may have a detrimental effect on the cardio respiratory system.

              • SIDS
              • cotinine
              • infant
              • nicotine
              • passive smoking

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