Association between initial route of fluoroquinolone administration and outcomes in patients hospitalized for community- Acquired Pneumonia

Raquel K. Belforti*, Tara Lagu, Sarah Haessler, Peter K. Lindenauer, Penelope S. Pekow, Aruna Priya, Marya D. Zilberberg, Daniel Skiest, Thomas L. Higgins, Mihaela S. Stefan, Michael B. Rothberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Background. Fluoroquinolones have equivalent oral and intravenous bioavailability, but hospitalized patients with communityacquired pneumonia (CAP) generally are treated intravenously. Our objectives were to compare outcomes of hospitalized CAP patients initially receiving intravenous vs oral respiratory fluoroquinolones. Methods. This was a retrospective cohort study utilizing data from 340 hospitals involving CAP patients admitted to a non- intensive care unit (ICU) setting from 2007 to 2010, who received intravenous or oral levofloxacin or moxifloxacin. The primary outcome was in-hospital mortality. Secondary outcomes included clinical deterioration (transfer to ICU, initiation of vasopressors, or invasive mechanical ventilation [IMV] initiated after the second hospital day), antibiotic escalation, length of stay (LOS), and cost. Results. Of 36 405 patients who met inclusion criteria, 34 200 (94%) initially received intravenous treatment and 2205 (6%) received oral treatment. Patients who received oral fluoroquinolones had lower unadjusted mortality (1.4% vs 2.5%; P = .002), and shorter mean LOS (5.0 vs 5.3; P < .001). Multivariable models using stabilized inverse propensity treatment weighting revealed lower rates of antibiotic escalation for oral vs intravenous therapy (odds ratio [OR], 0.84; 95% confidence interval [CI], .74-.96) but no differences in hospital mortality (OR, 0.82; 95% CI, .58-1.15), LOS (difference in days 0.03; 95% CI, -.09-.15), cost (difference in $-7.7; 95% CI, -197.4-182.0), late ICU admission (OR, 1.04; 95% CI, .80-1.36), late IMV (OR, 1.17; 95% CI, .87-1.56), or late vasopressor use (OR, 0.94; 95% CI, .68-1.30). Conclusions. Among hospitalized patients who received fluoroquinolones for CAP, there was no association between initial route of administration and outcomes. More patients may be treated orally without worsening outcomes.

Original languageEnglish (US)
Pages (from-to)1-9
Number of pages9
JournalClinical Infectious Diseases
Issue number1
StatePublished - Jul 1 2016


  • Community- Acquired pneumonia
  • Fluoroquinolones
  • Oral antibiotics

ASJC Scopus subject areas

  • Microbiology (medical)
  • Infectious Diseases


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