TABLE 2

Univariate Predictors of Bacteremia

Overall (N = 2568)Bacteremia (n = 65; 2.5%)No Bacteremia (n = 2503; 97.5%)P
Laboratory results
 WBC obtained, n (%)2392 (93.1)60 (92.3)2332 (93.2).79
  WBC, median × 103 cells per µL (IQR)12.5 (8.4–18.4)17.5 (10–23.9)12.4 (8.4–18.2)<.01
 CRP obtained, n (%)905 (35.2)32 (49.2)873 (34.9).02
  CRP, median mg/dL (IQR)8.4 (3.4–22.1)23.5 (17.8–30.8)8 (3.2–21.6)<.01
 ESR obtained, n (%)393 (15.3)12 (18.5)381 (15.2).47
  ESR, median mm/h (IQR)59 (34–87)75 (67.5–93)58 (32–86).05
Radiographic findings, n (%)
 CXR obtained on d 11956 (76.2)49 (75.4)1907 (76.2).88
 CXR report available1953 (76.1)49 (75.4)1904 (76.1).89
 Radiographic findings, n (%)<.01
  Definite pneumonia1300 (66.5)44 (89.8)1256 (65.9)
  Equivocal for pneumonia442 (22.6)2 (4.1)440 (23.1)
  No pneumonia204 (10.4)3 (6.1)201 (10.5)
  Unclear from report10 (0.5)0 (0.0)10 (0.5)
 Pattern of definite pneumonia (n = 1300), n (%).88
  Focal or lobar1165 (89.6)41 (93.2)1124 (89.5)
  Interstitial or diffuse2 (0.2)0 (0.0)2 (0.2)
  Not specified133 (10.2)3 (6.8)129 (10.3)
 Pleural effusion present, n (%)<.01
  Yes456 (23.3)19 (38.8)437 (23.0)
  No1479 (75.7)28 (57.1)1451 (76.2)
  Unclear18 (0.9)2 (4.1)16 (0.8)
 Pleural effusion size (n = 456), n (%).69
  Small or trivial269 (59.0)13 (68.4)256 (58.6)
  Medium or large153 (33.6)5 (26.3)148 (33.9)
  Unspecified34 (7.5)1 (5.3)33 (7.6)
Hospital course
 Length of stay, median (IQR), d2 (2–4)4 (3–10)2 (2–4)<.01
 Admitted to ICU, n (%)293 (11.4)14 (21.5)279 (11.1)<.01
 Chest tube drainage procedure,a n (%)148 (5.8)8 (12.3)140 (5.6).02
 Complicated pneumonia,b n (%)226 (8.8)10 (15.4)216 (8.6).06
 Died, n (%)1 (0)1 (1.5)0 (0.0)<.01
  • CXR, chest radiograph.

  • a ICD-9-CM procedure code for thoracentesis (34.91), chest tube placement (34.03), video-assisted thorascopic surgery (34.21), or thoracotomy (34.02, 34.09) occurring on initial or second hospital d.

  • b Composite definition including moderate or large pleural effusion on initial CXR and/or chest drainage procedure on initial or second hospital d.