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Table 1 Baseline characteristics of the ILD group and non-ILD group

From: Assessing the diagnostic value of a potential screening tool for detecting early interstitial lung disease at the onset of inflammatory rheumatic diseases

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