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Table 4 Final diagnosis for FUO at ICU discharge, with final results of all cultures known

From: Hospital-acquired sinusitis is a common cause of fever of unknown origin in orotracheally intubated critically ill patients

Cause of fever Sole cause One of multiple causesa
Central line infection 44 11
Upper respiratory tract infection/pneumonia 132 58
Sinusitis 57 48
Abdominal focus 8 16
Otherb 12 28
Unknown   46
Total 253 161
  1. See also Fig. 1. aMost patients with more than one cause of fever had sinusitis and bronchitis/pneumonia; bother causes of fever included meningitis (not related to sinusitis), phlebitis and deep venous thrombosis.