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Table 2 The microorganisms isolated from the patients and initial antibiotics

From: The association of prior hospitalization with clinical outcomes among patients admitted with pneumonia: a propensity score matching study

Variables Overall series Propensity score-matched pairs
PHAP (n = 97) CAP (n = 607) P value PHAP (n = 88) CAP (n = 88) P value
Microorganisms
 Identified pathogens 33 (34.0) 201 (33.1) 0.860 30 (34.1) 35 (39.8) 0.435
 Gram-positive bacteria
  Streptococcus pneumoniae 9 (9.2) 85 (14.0) 0.193 8 (9.1) 10 (11.4) 0.619
  Staphylococcus aureus 5 (5.1) 21 (3.4) 0.386 4 (4.5) 5 (5.7) 1.000
   Methicillin-sensitive S. aureus 2 (2.0) 9 (1.4) 0.654 2 (2.3) 3 (3.4) 1.000
   Methicillin-resistant S. aureus 3 (3.0) 12 (1.9) 0.448 2 (2.3) 2 (2.3) 1.000
  Other gram-positive bacteria 1 (1.0) 8 (1.3) 1.000 1 (1.1) 0 (0) 1.000
 Gram-negative bacteria
  Pseudomonas aeruginosa 8 (8.2) 19 (3.1) 0.023 8 (9.1) 7 (8.0) 0.787
  Haemophilus influenza 1 (1.0) 7 (1.1) 1.000 1 (1.1) 1 (1.1) 1.000
  Klebsiella pneumoniae 8 (8.2) 31 (5.1) 0.209 7 (8.0) 8 (9.1) 0.787
   ESBL (+) 0 (0) 2 (0.3) 1.000 0 (0) 0 (0) 1.000
   ESBL (−) 8 (8.2) 29 (4.7) 0.155 7 (8.0) 8 (9.1) 0.787
  Acinetobacter species 2 (2.0) 2 (0.3) 0.094 2 (2.3) 0 (0) 0.497
  Other gram-negative speciesa 1 (1.0) 11 (1.8) 1.000 1 (1.1) 1 (1.1) 1.000
  Mycoplasma pneumonia 2 (2.0) 27 (4.4) 0.409 2 (2.3) 3 (3.4) 1.000
 Polymicrobial pathogens 4 (4.1) 10 (1.6) 0.114 4 (4.5) 0 (0) 0.121
 Potentially drug-resistant pathogensb 14 (14.4) 41 (6.7) 0.009 12 (13.6) 9 (10.2) 0.485
  1. Data are presented as number (%). Percentages refer to dividing by the total number of patients
  2. CAP, community-acquired pneumonia; ESBL, extended-spectrum β-lactamase; HAP, hospital-acquired pneumonia; PHAP, prior hospitalization associated with pneumonia
  3. aOther gram-negative species included Escherichia coli, Enterobacter species, Serratia marcescens, and Legionella pneumophilia
  4. bMultidrug resistant pathogens included methicillin-resistant Staphylococcus aureus (MRSA), Pseudomonas species, Acinetobacter species, Stenotrophomonas maltophilia, and ESBL-producing Enterobacteriaceae