Table 1: Demographics of patients.

Number of patients37

Age67.7 ± 7.5

Height1.68 ± 0.07

Weigh77.2 ± 13.9

BMI27.2 ± 4.6

COPD
 Stage I2
 Stage II15
 Stage III12
 Stage IV8

Steroids
 Yes20
 No17

Mean ± standard deviation.