Journal of Public Health Advance Access published online on June 14, 2009
Journal of Public Health, doi:10.1093/pubmed/fdp057
Higher hospital costs and lengths of stay associated with quinolone-resistant Salmonella enterica infections in Hong Kong
Edward I. Broughton, Lecturer1,3
Margaret Ip, Professor2
Christian L. Coles, Associate Professor3
Damian G. Walker, Associate Professor3
1 Health Policy and Management, Columbia University, 600 W 168th Street, New York, NY, USA
2 Microbiology, Chinese University of Hong Kong, Hong Kong
3 International Health, Johns Hopkins School of Public Health, Baltimore, MD, USA
Address correspondence to Edward I. Broughton, E-mail: eib6{at}columbia.edu
| Abstract |
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Objectives The study sought to determine the differences in lengths of stay and medical costs between patients admitted to hospital with non-typhoidal salmonellosis that were either quinolone resistant (QR) or quinolone susceptible (QS).
Design We examined medical records of all patients 1 year of age or older admitted to a Hong Kong hospital between 2003 and 2008 with confirmed salmonellosis diagnosis. Data were collected on length of stay, age, sex, comorbidities, antibiotics and other medication use, diagnostic tests completed, serotype and susceptibility characteristics of isolated and the circumstances of discharge from hospital. We used Cox proportional regression to determine the differences in lengths of stay and quantile regression for differences in hospital costs.
Results Median duration of hospitalization among QR salmonellosis patients was 1 day (33%; 95% CI: 13–47%) longer than those with QS salmonellosis, adjusting for confounders. Adjusted median costs were US $399 (35%) and 75th percentile costs were US $760 (43%) higher in the QR group than those in the QS group, indicating a greater difference among sicker patients.
Conclusion The finding of substantially longer stays and higher costs associated with QR indicates that interventions that decrease QR prevalence will lead to significant savings for the health system in the management of hospitalized salmonellosis cases.
Keywords: costs, fluoroquinolone, hospitalization, quinolone, resistance, Salmonella