Table 1—

Characteristics of patients

CharacteristicsInpatientsOutpatientsAll patients
Subjects n11006761776
Male715 (65)409 (60.5)1124 (63.3)
Age yrs71.1±15.946.8±17.961.8±20.5
Age ≥65 yrs823 (74.8)150 (22.2)973 (54.8)
Nursing home resident99 (9.0)3 (0.4)102 (5.7)
Prior antibiotics210 (19.8)126 (19.8)336 (19.8)
Co-morbid illnesses
 Neoplastic disease70 (6.4)2 (0.3)72 (4.1)
 Liver disease55 (5.0)7 (1.0)62 (3.5)
 Congestive heart failure90 (8.2)11 (1.6)101 (5.7)
 Cerebrovascular disease135 (12.3)9 (1.3)144 (8.1)
 Renal disease106 (9.6)9 (1.3)115 (6.5)
PSI risk class#
 I113 (10.3)407 (60.2)520 (29.3)
 II111 (10.1)176 (26)287 (16.2)
 III260 (23.6)78 (11.5)338 (19)
 IV423 (38.5)15 (2.2)438 (24.7)
 V193 (17.6)0 (0)193 (10.9)
PSI98.8±35.546.6±21.278.9±39.9
  • Data presented as n (%) or mean±sd. #: severity of illness was assessed using the Pneumonia Severity Index (PSI) 6. Class I patients have the lowest severity and mortality risk, and class V the highest severity and mortality risk.