Table 1.
Clinical and serological features of 137 patients with rheumatoid arthritis
| Total | ILD - | ILD + | p | |
|---|---|---|---|---|
| Nr. | 137 | 78 | 59 | |
| Smoke (%) | 37.2 | 39.7 | 34 | ns |
| Sex M/F | 1/1.83 | 1/2.54 | 1/1.31 | ns |
| ACPA (%) | 77.2 | 77.1 | 77.2 | ns |
| Rheumatoid factor (%) | 78.6 | 81.1 | 75.4 | ns |
| Forced vital capacity (% ± SD) | 91.8 ± 22.3 | 93.1 ± 21.3 | 90.3 ± 23.7 | ns |
| DLCO (% ± SD) | 59.9 ± 18.0 | 65.7 ± 20.4 | 54.4 ± 13.6 | 0.015 |
| Disease duration (years±SD) | 11.1 ± 9.5 | 10.4 ± 7.8 | 12.1 ± 11.3 | ns |
| Mean age at disease onset (years±SD) | 56.1 ± 12.9 | 55.3 ± 12.3 | 57.0 ± 13.6 | ns |
| Mean age at study entry (years±SD) | 67.9 ± 9.9 | 66.5 ± 10.3 | 69.8 ± 9.1 | 0.049 |
ILD Interstitial lung disease, M Males, F Females, ACPA Anti-citrullinated peptide antibodies, DLCO Diffusion lung capacity of CO, SD Standard deviation