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Table 1 Clinical and demographic characteristics of H1N1 patients vs. positive bacterial culture patients and ICU ventilated controls

From: Plasma metabolomics for the diagnosis and prognosis of H1N1 influenza pneumonia

Variable H1N1 patients (n = 29) Positive bacterial culture (n = 29)
 Age yrs. (mean ± SD) 51.1 ± 13.2 70.4 ± 20.7
 Male/Female 13/16 13/16
 APACHE II/APACHE IIIa 23.5 ± 7.4 72.8 ± 24.4
 ICU LOS* 20.1 ± 14.5 1.7 ± 3.2
 Hospital LOS* 32 ± 23.8 10.4 ± 10.3
 Smoker 13 17
 Altered LOC 2 5
 Renal Failure 2 1
 CHF 3 6
 Alcohol 3 4
 Cerebrovascular Disease 3 4
Variable H1N1 patients (n = 42) ICU ventilated controls (n = 31)
 Age yrs. (mean ± SD) 45.7 ± 14.6 50.6 ± 13.8
 Male/Female 13/29 14/17
 BMI (mean ± SD)* 35.2 ± 12.6 30.7 ± 7.6
 APACHE II 22 ± 7.7 19.1 ± 5.7
 ICU LOS* 20.6 ± 15.6 4 ± 4.9
 Hospital LOS 31.5 ± 23.5 24.7 ± 33.9
  1. SD standard deviation, (%) of subjects, unless otherwise indicated, LOS Length of Stay, DBA Days before admission, APACHE II Acute Physiology and Chronic Health Evaluation II ICU scoring system, CHF congestive heart disease. aThe APACHE II score is for H1N1 and APACHE III is for positive bacterial culture, *reflects statistically significant difference in groups p < 0.05