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Table 4 Predicted and observed cumulative mortality of the patients with RA-ILD

From: Are risk predicting models useful for estimating survival of patients with rheumatoid arthritis-associated interstitial lung disease?

GAP/ILD-GAP stage

Observed

Predicted by GAP index and staging system

Predicted by ILD-GAP

1-Y mortality

 Stage I

0.0 (0.0–9.4)

5.6

3.1

 Stage II

8.3 (1.5–35.4)

16.2

8.8

2-Y mortality

 Stage I

14.3 (6.3–29.4)

10.9

6.6

 Stage II

9.1 (1.6–37.7)

29.9

18.0

3-Y mortality

 Stage I

17.6 (8.3–33.5)

16.3

10.2

 Stage II

27.3 (9.7–56.6)

42.1

26.9

  1. % (95% CI calculated by Wilson score)