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Risk Factors for Mortality in Patients with Nosocomial Stenotrophomonas maltophilia Pneumonia

Published online by Cambridge University Press:  02 January 2015

Chia-Cheng Tseng ,
Wen-Feng Fang ,
Kuo-Tung Huang ,
Pei-Wen Chang ,
Mei-Lien Tu ,
Yi-Ping Shiang ,
I. S. Douglas  and
Meng-Chih Lin
Chia-Cheng Tseng
Affiliation:
Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
Wen-Feng Fang
Affiliation:
Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan Department of Respiratory Care, Pulmonary Research Center, Chang Gung Institute of Technology, Chiayi, Taiwan
Kuo-Tung Huang
Affiliation:
Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
Mei-Lien Tu
Affiliation:
Department of Respiratory Therapy, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
Yi-Ping Shiang
Affiliation:
Department of Pharmacy, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
I. S. Douglas
Affiliation:
Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Colorado, Denver, Colorado
Meng-Chih Lin*
Affiliation:
Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan Department of Respiratory Care, Pulmonary Research Center, Chang Gung Institute of Technology, Chiayi, Taiwan
*
123 Ta-Pei Road, Niao-Sung Hsiang, Kaohsiung Hsien, Taiwan 83301 ([email protected])
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Abstract

Objective.

The aim of this study was to determine potential risk factors for mortality in patients with nosocomial Stenotrophomonas maltophilia pneumonia.

Design.

A retrospective, single-center, observational study.

Setting.

A 2400-bed tertiary teaching hospital in southern Taiwan.

Patients and Methods.

This retrospective study evaluated patients (age, at least 18 years) with nosocomial pneumonia (S. maltophilia isolated from respiratory culture) who were seen at Kaohsiung Chang Gung Memorial Hospital over a 3-year period. A total of 406 patients (64% male, mean age ± standard deviation, 69.6 ± 14.93 years; mean duration of hospital stay ± standard deviation, 57.5 ± 39.47 days) were included.

Results.

Most index isolates (53.9%) were from the first sample cultured. Polymicrobial isolates were cultured from samples from 177 (43.6%) of the 406 study patients. The most common copathogen was Pseudomonas aeruginosa (53.11% of isolates). The all-cause hospital mortality rate was 42.6% (173 deaths among 406 patients). Survivors had a shorter time from admission to a positive index culture result than did nonsurvivors (26.1 vs 31.7 days; P = .04). Mortality was significantly higher among patients with malignancy (adjusted odds ratio [AOR], 2.48; 95% confidence interval [CI], 1.52–4.07; P < .001 ), renal disease (AOR, 2.6; 95% CI, 1.51–4.47; P = .001), intensive care unit stay (AOR, 1.72; 95% CI, 1.1–2.7; P = .018), and inadequate initial empirical antibiotic therapy (AOR, 2.17; 95% CI, 1.4–3.38; P = .001).

Conclusions.

S. maltophilia pneumonia is associated with a high mortality rate and is commonly associated with concomitant polymicrobial colonization or infection. Underlying comorbidities and inadequate initial empirical antibiotic therapy substantially account for increased mortality rates.

Type
Original Articles
Information
Infection Control & Hospital Epidemiology , Volume 30 , Issue 12 , December 2009 , pp. 1193 - 1202
Copyright
Copyright © The Society for Healthcare Epidemiology of America 2009

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