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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Acad Emerg Med. 2015 May 20;22(6):730–740. doi: 10.1111/acem.12672

Table 4.

Empirical antibiotics administered in the emergency department.

Antibiotic Regimen, n (%) No HCAP criteria (n = 310) ≥ 1 HCAP criteria (n = 304) All patients (N = 614)
Antibiotics directed at resistant bacteria 128 (41.3) 255 (83.9) 383 (62.4)
 Regimen A:

  1. antipseudomonal β-lactam, carbapenem, or aztreonam

  2. vancomycin or linezolid

  3. +/− fluoroquinolone, azithromycin, or doxycycline

 57 (18.4) 146 (48.0) 203 (33.1)
 Regimen B:

  1. antipseudomonal β-lactam, carbapenem, or aztreonam

  2. fluoroquinolone, azithromycin, or doxycycline

 21 (6.8) 28 (9.2) 49 (8.0)
 Regimen C:

  1. fluoroquinolone, azithromycin, or doxycycline

  2. vancomycin or linezolid

 13 (4.2) 31 (10.2) 44 (7.2)
 Regimen D:

  • Other regimen directed at resistant bacteria

 37 (11.9) 50 (16.4) 87 (14.2)
Antibiotics directed at non-resistant bacteria 180 (58.1) 48 (15.8) 228 (37.1)
 Regimen E:

  • Fluoroquinolone, azithromycin, or doxycycline monotherapy

 111 (35.8) 33 (10.9) 144 (23.5)
 Regimen F:

  1. β-lactam without pseudomonal coverage

  2. fluoroquinolone, azithromycin, or doxycycline

 68 (21.9) 15 (4.9) 83 (13.5)
 Regimen G:

  • β-lactam without pseudomonal coverage monotherapy

 1 (0.3) 0 (0) 1 (0.2)
No antibiotics in the ED 2 (0.6) 1 (0.3) 3 (0.5)

HCAP = health care-associated pneumonia