Table 6 Concordance coefficient of restrictive lung disease ^† in non-Korean equations and Choi's equation

20-39

8 (2.7)

10 (3.3)

7 (87.5)

3 (1.0)

1 (12.5)

8 (2.7)

6 (75.0)

0.771*

0.170*

0.743*

40-49

10 (4.3)

9 (3.9)

7 (70.0)

1 (0.4)

0 (0.0)

3 (1.3)

2 (20.0)

0.726*

-0.008

0.294*

50-

22 (7.5)

8 (2.7)

8 (36.4)

2 (0.7)

2 (9.1)

5 (1.7)

5 (22.7)

0.514*

0.156*

0.352*

Total

40 (4.8)

27 (3.3)

22 (55.0)

6 (0.7)

3 (7.5)

16 (1.9)

13 (32.5)

0.643*

0.119*

0.449*