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Table 1 Comparison of baseline characteristics for patients with or without AKI in patients affected by pandemic 2009 influenza A (H1N1) virus infectiona

From: Acute kidney injury in critical ill patients affected by influenza A (H1N1) virus infection

Variables

Non-AKI (n = 543)

AKI (n = 118)

Total (n = 661)

P value

Mean age, yr (±SD)

43.5 (13.9)

44.9 (15.2)

43.8 (14.2)

0.3

Male sex, n (%)

288 (53%)

77 (65.3%)

365 (55.2%)

0.01

Comorbidities, n (%)

    

   Pregnancy

34 (6.3%)

5 (4.3%)

39 (5.9%)

0.5

   COPD

90 (16.5%)

19 (16.2%)

109 (16.5%)

0.9

   Asthma

76 (14.0%)

11 (9.4%)

87 (13.2%)

0.2

   Heart failure

29 (5.3%)

10 (8.5%)

39 (5.9%)

0.2

   Obesity

196 (36.0%)

52 (44.4%)

248 (37.5%)

0.09

   Diabetes

52 (9.6%)

19 (16.2%)

71 (10.7%)

0.04

   Immunosupression

17 (3.1%)

3 (2.6%)

20 (3.0%)

0.9

   Hematologic disease

26 (4.8%)

8 (6.8%)

34 (5.1%)

0.3

   Neuromuscular disease

21 (3.9%)

2 (1.7%)

23 (3.5%)

0.4

   HIV infection

12 (2.2%)

3 (2.6%)

15 (2.3%)

0.7

  1. aAKI, acute kidney injury; COPD, chronic obstructive pulmonary disease; HIV, human immunodeficiency virus.