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      Risk factors for drug-resistant pathogens in community-acquired and healthcare-associated pneumonia.

      American journal of respiratory and critical care medicine

      ROC Curve, Activities of Daily Living, Risk Factors, Prospective Studies, microbiology, etiology, drug therapy, Pneumonia, Bacterial, Male, Japan, adverse effects, Immunosuppression, Humans, statistics & numerical data, Hospitalization, Female, Enteral Nutrition, Drug Resistance, Multiple, Bacterial, Cross Infection, Community-Acquired Infections, therapeutic use, Anti-Bacterial Agents, Aged, 80 and over, Aged

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          Abstract

          Identification of patients with drug-resistant pathogens at initial diagnosis is essential for treatment of pneumonia. To elucidate clinical features of community-acquired pneumonia (CAP) and healthcare-associated pneumonia (HCAP), and to clarify risk factors for drug-resistant pathogens in patients with CAP and HCAP. A prospective observational study was conducted in hospitalized patients with pneumonia at 10 institutions in Japan. Pathogens identified as not susceptible to ceftriaxone, ampicillin-sulbactam, macrolides, and respiratory fluoroquinolones were defined as CAP drug-resistant pathogens (CAP-DRPs). In total, 1,413 patients (887 CAP and 526 HCAP) were analyzed. CAP-DRPs were more frequently found in patients with HCAP (26.6%) than in patients with CAP (8.6%). Independent risk factors for CAP-DRPs were almost identical in patients with CAP and HCAP. These included prior hospitalization (adjusted odds ratio [AOR], 2.06; 95% confidence interval [CI], 1.23-3.43), immunosuppression (AOR, 2.31; 95% CI, 1.05-5.11), previous antibiotic use (AOR, 2.45; 95% CI, 1.51-3.98), use of gastric acid-suppressive agents (AOR, 2.22; 95% CI, 1.39-3.57), tube feeding (AOR, 2.43; 95% CI, 1.18-5.00), and nonambulatory status (AOR, 2.45; 95% CI, 1.40-4.30) in the combined patients with CAP and HCAP. The area under the receiver operating characteristic curve for counting the number of risk factors was 0.79 (95% CI, 0.74-0.84). The clinical profile of HCAP was different from that of CAP. However, physicians can predict drug resistance in patients with either CAP or HCAP by taking account of the cumulative number of the risk factors. Clinical trial registered with https://upload.umin.ac.jp/cgi-open-bin/ctr/ctr.cgi?function=brows&action=brows&type=summary&recptno=R000004001&language=E ; number UMIN000003306.

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          Journal
          10.1164/rccm.201301-0079OC
          23855620

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