The Science Journal of the American Association for Respiratory Care

2007 OPEN FORUM Abstracts

TRENDS OF ASTHMA HOSPITALIZATION AMONG DIFFERENT AGE GROUPS IN THE UNITED STATES

A. Patel1, A. A. Divani1, R. Pakdaman1, M. Abdelmoula1, J. Zhou1, K. Fennelly2


Objective: The objectives of this study are to explicate frequency of asthma hospitalizations among various age groups, association of co-morbid conditions with asthma and year-round variation in asthma hospitalization trends in the United States (US).

Method: All asthma hospitalizations in the US were identified in National Inpatient Sample (NIS) 1994,1999 and 2004 databases using International Classification of Disease, 9th Revision (ICD-9) code: 493.00 – 493.99. NIS is the largest all-payer care database that is publicly available in the US, containing data from 5 to 8 million hospital stays from about 1000 hospitals sampled to approximate a 20-percent stratified sample of the US community hospitals. Continuous variables were compared doing t-test and categorical variables were compared using Chi-square.

Results: Admissions were higher among 0-10 yr group (~ 31%) followed by patients more than 60 yrs of age (~21%). Admissions were reported least during months of May to September period. Hypertension (19%) and Diabetes (~11%) were most common co-morbid conditions reported among asthma patients within all 3 years. Association of asthma with COPD (2%) and allergy (1%) was not commonly seen. Smoking and History of tobacco use co-morbid conditions have been rising (2.6% - 11.5% and 0.1% - 5.2%, respectively) between 1994 and 2004.

Conclusions: Children from 0-10 yrs comprise main pool of asthma hospitalizations. Low number of asthma hospitalization during summer correlates with lack of humidity and also low pollen counts during that period. Better control of co-morbid conditions may eventually help to control asthma hospitalization better.

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