Table 1 Baseline characteristics of hospitalized patients with pneumonia and 2009 H1N1 influenza in the First Affiliated Hospital of China Medical University during November 4 to December 31, 2009.

Female sex

18 (26)

Age group:

18-49

56 (82)

50-64

11 (16)

≥ 65

1 (1)

Medical condition:

Any one condition

23 (34)

Asthma

1

Chronic obstructive pulmonary disease

3

Tuberculosis

2

Diabetes

2

Congenital heart disease

1

Rheumatic heart disease

2

Hypertension

9

Chronic renal failure

1

Nephritic syndrome

1

Kidney transplant

1

Chronic hepatitis type b

1

Liver cirrhosis

1

Fatty liver disease

1

Guillain-Barre syndrome

1

Pituitary adenoma

1

Cigarette index ≥ 400

9 (13)

BMI:

24-27.9

20 (29)

≥ 28

22 (32)