Variable | ILD group, number (%) | Non-ILD group, number (%) | Difference |
---|---|---|---|
Number | 63 (50.0%) | 63 (50.0%) | |
Gender | |||
Men | 17 (27.0%) | 17 (27.0%) | χ2(1) = 0.000,P = 1.000 |
Women | 46 (63.0%) | 46 (63.0%) | |
Age | |||
Median ± SD | 58.6 ± 14.2 years | 53.8 ± 14.3 years | t(124) = − 1.907,P = 0.059 |
Inflammatory rheumatic diseases | |||
Connective tissue disease | 35 (55.6%) | 55 (87.3%) | χ2(3) = 17.732,P < 0.001, Cramer’s V = 0.375 |
Small vessel vasculitis | 16 (25.4%) | 3 (4.8%) | |
Myositis | 12 (19.0%) | 5 (7.9%) | |
Symptoms | |||
Dyspnea | 36 (57.1%) | 22 (34.9%) | χ2(1) = 6.262,P = 0.012 |
Cough | 17 (27.0%) | 11 (17.5%) | χ2(1) = 1.653,P = 0.199 |
Sputum | 11 (17.5%) | 8 (12.7%) | χ2(1) = 0.558,P = 0.455 |
Sclerosiphonia | 20 (31.7%) | 5 (7.9%) | χ2(1) = 11.228,P = 0.001 |
No symptoms | 20 (31.7%) | 30 (47.6%) | χ2(1) = 3.316,P = 0.069 |
Pulmonary comorbidities | |||
Emphysema | 2 (3.2%) | 3 (4.8%) | χ2(1) = 0.19,P = 0.661 |
COPD | 3 (4.8%) | 1 (1.6%) | χ2(1) = 1.03,P = 0.310 |
Smoking | |||
Active | 10 (15.9%) | 11 (17.5%) | χ2(3) = 4.92,P = 0.085 |
Ex-smoker | 18 (28.6%) | 8 (12.7%) | |
Pack years | 21.7 ± 12.3 | 22.7 ± 13.9 | t(38) = − 0.24,P = 0.808 |