Tob Control doi:10.1136/tc.2010.038711
  • Research paper

Smoke-free households with children and decreasing rates of paediatric clinical encounters for otitis media in the United States

  1. Zubair Kabir2
  1. 1Harvard School of Public Health, Center for Global Tobacco Control, Boston, Massachusetts, USA
  2. 2Research Institute for a Tobacco Free Society, Republic of Ireland
  1. Correspondence to Hillel R Alpert, Harvard School of Public Health, Center for Global Tobacco Control, Landmark Building, Floor 3E 401 Park Drive, Boston, MA 02215, USA; halpert{at}
  1. Contributors All authors contributed to one or more of conception and design, acquisition of data or analysis and interpretation of data in the study, drafting and revising the article, and providing important intellectual content.

  • Received 2 July 2010
  • Accepted 27 October 2010
  • Published Online First 26 January 2011


Objective Temporal trends in paediatric encounters for otitis media (OM) were last characterised and observed to be steadily increasing from 1975 to the mid-1990s. The present study uses an ecological design to quantify trends in paediatric encounters for OM concurrent with a period of decline of an important risk factor, secondhand smoke (SHS) exposure among children.

Patients and Methods Annual paediatric ambulatory visit and hospital discharge rates for children ≤6 years with OM as primary diagnosis were computed with nationally representative data for 1993–2006. Percentages of households with children ≤6 years and no-smoking rules were computed using Tobacco Use Supplement to the Current Population Survey data. Average annual percentage changes were determined for covariate-adjusted rates of paediatric encounters for OM using joinpoint analysis.

Results While percentages of homes with children and no-smoking rules increased by 89% from 45.5% in 1993 to 86.1% in 2006, average annual covariate-adjusted paediatric encounters for OM decreased by 4.6% (95% CI 4.5% to 4.8%) for ambulatory visits and by 9.8% (95% CI 9.1% to 10.6%) for hospital discharges. Coverage by 7-valent pneumococcal conjugate vaccination (PCV7) increased since 2002, while little variation occurred in other potentially associated risk factors.

Conclusions Paediatric encounter rates for OM decreased steadily over a 13-year period reversing a previously reported long-term increasing trend reported. Reduced SHS exposure, PCV7 coverage since 2002 and other factors may have contributed to the decline. Further research is needed to provide direct estimates of paediatric encounter rates in exposed and unexposed populations for causal inference.


  • Funding Research support for this study is provided by the Flight Attendant Medical Research Institute, Clinical Innovator Award 072085.

  • Competing interests None.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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