Table 1: Patients’ characteristics and health status.

Characteristics Mean ± SDFrequencyPercentage (%)

Age (years)39
Gender 39
 Male2359
 Female1641
FEV1% predicted39
GOLD stage39
 II1346.2
 III1833.3
 IV820.5
Smoking38
 Current smoker1025.6
 Former smoker2871.8
MRC38
 1717.9
 21230.8
 31435.9
 437.7
 525.1
BMI (kg/m2)38
Work status 39
  Employed717.9
  Unemployed3282.1

Abbreviations: FEV1% predicted: forced expiratory volume in 1 second percent predicted, GOLD: Global Initiative for Chronic Obstructive Lung Disease, MRC: medical research council dyspnea scale, BMI: Body Mass Index.