Table 2 Impact of ever WS exposure on baseline lung function and its decline^a

All subjects

 FEV1 (ml/s)

− 24.2 (1.0)

− 75.2 (23.7)

− 4.3 (1.9)

 P value

 < 0.0001

0.0016

0.025

 FVC (ml)

− 15.0 (1.2)

− 26.1 (25.2)

− 2.4 (2.4)

 P value

 < 0.0001

0.30

0.30

 FEV1/FVC ratio (%)

− 0.386 (0.019)

− 1.792 (0.430)

− 0.093 (0.038)

 P value

 < 0.0001

 < 0.0001

0.015

Age < 55.9 year^b

 FEV1 (ml/s)

− 24.4 (1.5)

− 65.6 (30.7)

− 0.5 (2.8)

 P value

 < 0.0001

0.033

0.85

 FVC (ml)

− 13.5 (1.7)

− 7.3 (33.1)

− 1.6 (3.2)

 P value

 < 0.0001

0.82

0.62

 FEV1/FVC ratio (%)

− 0.379 (0.029)

− 1.666 (0.493)

− 0.014 (0.053)

 P value

 < 0.0001

0.0008

0.80

Age ≥ 55.9 year^b

 FEV1 (ml/s)

− 24.0 (1.2)

− 76.6 (36.8)

− 8.7 (2.6)

 P value

 < 0.0001

0.038

0.001

 FVC (ml)

− 16.0 (1.6)

− 37.5 (38.7)

− 3.8 (3.5)

 P value

 < 0.0001

0.33

0.28

 FEV1/FVC ratio (%)

− 0.391(0.026)

− 2.013 (0.724)

− 0.196 (0.055)

 P value

 < 0.0001

0.0055

0.0004