Chest
Volume 136, Issue 3, September 2009, Pages 811-815
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Original Research
Cough
Associated Factors in Children With Chronic Cough

https://doi.org/10.1378/chest.09-0649Get rights and content

Background

Children presenting with chronic cough are common to the primary care physicians, but data on the etiology are scant.

Methods

We evaluated 40 children (age range, 5 to 12 years) with chronic cough (> 8 weeks duration) with no obvious cause who were referred by their primary care physicians. All patients underwent an extensive multispecialty workup that included pulmonary, GI, allergy, immunology, and otorhinolaryngology testing. Response to treatment was quantified pretreatment and 8 weeks after treatment by using a visual analog scale.

Results

Positive diagnostic test results were noted for gastroesophageal reflux disease (27.5%), allergy (22.5%), asthma (12.5%), infection (5%), aspiration (2.5%), and multiple etiologies (20%). Appropriate treatment for these factors resulted in a significant improvement in cough.

Conclusion

Reflux, allergy, and asthma accounted for > 80% of the likely etiologic factors of chronic cough in children and responded to a!ppropriate treatment.

Section snippets

Patients

Children with a cough duration of > 8 weeks were referred to the Pediatric Specialty Center at West Jefferson Medical Center and underwent the workup. They were all from the same geographic area. Patients were evaluated by and workup was directed by the same pulmonologist, gastroenterologist, allergist, immunologist, and otorhinolaryngologist. For inclusion in the study, the children had to have been born full term, be neurodevelopmentally appropriate for age, with no direct or indirect

Results

Forty consecutive children (mean age, 7.8 years; age range, 5 to 12 years; 17 were female, and 23 were male) fulfilling all entry criteria were included in the study. The duration of cough ranged from 8 to 36 weeks (mean [± SD] duration, 18 ± 6 weeks). The associated factors are listed in Table 1. One or more associated and potentially causative factors were identified in 90% of children. The single most common factor associated with chronic cough by itself was gastroesophageal reflux disease

Discussion

This is the first study to comprehensively evaluate children with chronic cough and without a selective workup. Our study suggests that among children with chronic cough (ie, cough of > 8 weeks duration), the most common likely causative factors were allergy, reflux, and asthma. Most children with allergy were found to have upper airway cough syndrome (previously designated as postnasal drip syndrome). Nocturnal cough was more common in the asthma and allergy groups compared with the reflux

Acknowledgments

Author contributions: Drs. Khoshoo, Edell, Haydel, and Saturno conceived the study, developed the protocol, and managed the patients. Ms. Mohnot and Dr. Kobernick contributed to the data analysis. Dr. Khoshoo wrote the first draft.

Financial/nonfinancial disclosures: The authors have reported to the ACCP that no significant conflicts of interest exist with any companies/organizations whose products or services may be discussed in this article.

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This article was presented in part at the Annual Conference of American College of Chest Physicians, Chicago, IL, October 24, 2007.

Reproduction of this article is prohibited without written permission from the American College of Chest Physicians (www.chestjournal.org/site/misc/reprints.xhtml).

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