Table 5 OR with 95% CI for the development of COPD in pneumoconiosis patients with smoking history according to multiple logistic regression analysis

2.55(1.73,3.75)

0.00**

0.89(0.86,0.93)

0.00**

0.76(0.52,1.12)

0.16

1.09(1.00,1.20)

0.06

1.01(0.77,1.56)

0.63

1.00(0.98,1.01)

0.50

1.07(0.78,1.45)

0.68

1.00(0.97,1.03)

0.98

1.51(0.86,2.66)

0.15

1.44(0.81,2.56)

0.22

1.08(0.52,2.25)

0.84

1.22(0.57,2.60)

0.61

3.40(2.43,4.76)

0.00**

11.85(5.97,23.49)

0.00**

3.92(1.90,8.07)

0.00**

4.29(0.81,22.65)

0.09

4.16(0.76,22.93)

0.10

0.21(0.05,0.95)

0.04*

0.21(0.05,1.00)

0.06

3.00(1.70,5.31)

0.00**

3.10(1.72,5.56)

0.00**

0.75(0.22,2.53)

0.64

0.75(0.22,2.55)

0.64

0.94(0.43,2.05)

0.87

0.91(0.41,2.00)

0.81