Table 1 Comparison of baseline characteristics between the interstitial lung abnormality (ILA) and no ILA groups^*

Number of patients

2,890

387

2,503

Age, years

55.8 ± 9.2

58.1 ± 9.1

55.5 ± 9.2

< 0.001

Male

2,297 (79.5)

292 (75.5)

2,005 (80.1)

0.042

Ever-smoker (n = 2,873)

2,032 (70.7)

250 (64.9)

1,782 (71.6)

0.007

BMI, kg/m²

24.3 ± 3.3

25.3 ± 2.9

24.1 ± 3.4

0.001

WBCs, ×10³/µL

5.8 ± 1.7

6.0 ± 1.8

5.8 ± 1.7

0.024

Hgb, g/dL

14.8 ± 1.4

14.8 ± 1.5

14.8 ± 1.3

0.888

Platelet, ×10³/µL

231.5 ± 51.1

231.0 ± 50.8

231.5 ± 51.1

0.857

ESR, mm/h

12.3 ± 10.3

14.8 ± 12.4

11.8 ± 9.9

< 0.001

HbA1c^†, %

5.8 ± 0.8

5.8 ± 0.8

5.8 ± 0.8

0.076^†

Total cholesterol, mg/dL

188.9 ± 34.4

188.6 ± 35.7

189.0 ± 34.1

0.818

Triglyceride, mg/dL

128.5 ± 75.9

137.1 ± 75.4

127.2 ± 75.9

0.017

HDL, mg/dL

53.6 ± 13.9

50.4 ± 13.2

54.1 ± 13.8

< 0.001

LDL, mg/dL

116.1 ± 30.3

116.9 ± 31.3

115.9 ± 30.1

0.058

Protein, g/dL

7.1 ± 0.4

7.2 ± 0.4

7.1 ± 0.4

< 0.001

Albumin, g/dL

4.2 ± 0.3

4.2 ± 0.2

4.2 ± 0.3

0.140

BUN, mg/dL

13.4 ± 3.4

13.4 ± 3.7

13.4 ± 3.4

0.726

Creatinine, mg/dL

0.9 ± 0.2

0.9 ± 0.2

0.9 ± 0.2

0.479

FVC, predicted %

89.0 ± 11.1

85.8 ± 11.1

89.5 ± 10.9

< 0.001

FEV₁, predicted %

88.6 ± 16.1

87.6 ± 12.5

88.8 ± 12.2

0.099

FEV₁/FVC, %

77.1 ± 3.2

77.7 ± 7.2

76.9 ± 7.3

0.075