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Table 3 Most common risk factors for pandemic influenza A (H1N1)v in the ICU

From: Intensive care adult patients with severe respiratory failure caused by Influenza A (H1N1)v in Spain

Risk factor

Cases (n = 32)

Obesity

10

BMI>40

4

BMI 30 to 40

6

Asthma

5

COPD

4

Pregnancy

2

Heart failure

1

Arterial hypertension

1

Chronic renal failure

1

Diabetes mellitus

1

HIV

1

Neuromuscular disease

1

Hematologic disease

1

None

15

  1. BMI = body mass index; COPD = chronic obstructive pulmonary disease; HIV = positive human immunodeficiency virus.
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Critical Care

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