Table 1 Connective tissue disease associated interstitial lung disease (CTD-ILD) cohort demographic and clinical characteristics
Demographic and clinical characteristics | Mean ± SD or N (%) or Median (range) |
|---|---|
Age (year) | 50.10 ± 9.64 |
Female, No. (%) | 132 (89.8) |
BMI (kg/m2) § | 23.10 ± 3.29 |
Ethnicity (Han nationality), No. (%) | 136 (92.5) |
Former/current smoker, No. (%) | 17 (11.6) |
Comorbidity, No. (%) | 87 (59.2) |
Type of CTD | Â |
 Specific CTD (SCTD) | 102 (69.4) |
  Systemic sclerosis/scleroderma (SSc) | 33 (22.4) |
  Polymyositis/dermatomyositis (PM/DM) | 39 (26.5) |
  Sjögren Syndrome (SjS) | 10 (6.8) |
  Rheumatoid Arthritis (RA) | 11 (7.5) |
  Systemic lupus erythematosus (SLE) | 9 (6.1) |
 Undifferentiated CTD (UCTD) | 30 (20.4) |
 Mixed CTD (MCTD) | 15 (10.2) |
Dyspnea (Borg dyspnea score) | Â |
 No dyspnea | 76 (51.7) |
 Mild dyspnea | 53 (36.1) |
 Moderate to Severe dyspnea | 16 (10.9) |
 NA | 2 (1.4) |
Cough (LCQ) | Â |
 No cough | 81 (55.1) |
 Mild cough | 39 (26.5) |
 Severe cough | 25 (17.0) |
 NA | 2 (1.4) |
Pulmonary Function Test ¶ |  |
 FVC% predicted ¶ | 89.59 ± 22.94 |
 FEV1%predicted ¶ | 87.50 ± 21.14 |
 TLC%predicted ¶ | 85.80 ± 19.40 |
 DLCO% predicted+ | 74.55 (58.13, 84.48) |
Severity of CTD-ILD | Â |
 Limited CTD-ILD | 89 (60.5) |
 Extensive CTD-ILD | 39 (26.5) |
 NA | 19 (13.0) |
SF-36 λ (range 0–100) |  |
 Physical component summary (PCS) score | 51.80 (45.28, 56.99) |
 Mental component summary (MCS) score | 52.33 (43.97, 57.53) |