P values OR
Age 0.01 1.05(1.01-1.10)
Gender (male) 0.03 4.6 (1.08-1.06)
Smokingpack/year 0.059 1.0(0.9-1.05)
 Income 0.2 1.6(0.7-3.4)
Education 0.6 0.9(0.6-1.39
Anxiety 0.4 0.9 (0.8-1.06)
Table 6: The Predictors of Airway Obstruction (FEV1/FVC<70%).