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Table 1 Study participants’ characteristic

From: Regional lung function assessment using electrical impedance tomography in COPD, PRISm, and normal spirometry subjects: insights into early diagnostic potential

Variables

Normal (n = 98)

COPD

(n = 63)

PRISm (n = 33)

P value

Sex, n (%)

 Male

49 (50.0%)

53 (84.1%)

19 (57.6%)

.000

 Female

49 (50.0%)

10 (15.9%)

14 (42.4%)

 

 Age (years)

54.72 ± 14.00

67.63 ± 9.79

59.15 ± 15.60

.000

 BMI (kg/m2)

24.35 ± 3.39

24.03 ± 3.27

24.05 ± 3.91

.487

Smoking, n (%)

 Never

69 (70.4%)

22 (34.9%)

18 (54.5%)

.000

 Former

9 (9.2%)

24 (38.1%)

8 (24.2%)

 

 Current

20 (20.4%)

17 (27.0%)

7 (21.2%)

 

 Previous diagnosis of COPD

2 (2.0%)

18 (28.6%)

3 (9.1%)

.000

 Bronchodilators have been used, n (%)

15 (15.3%)

26 (41.3%)

5 (15.2%)

.000

Comorbidities, n (%)

 Hypertension

28 (28.6%)

25 (39.7%)

17 (51.5%)

.046

 Diabetes

10 (10.2%)

7 (11.1%)

5 (15.1%)

.739

 CHD

9 (9.2%)

9 (14.3%)

6 (18.1%)

.340

 Tumor

1 (1.0%)

3 (4.8%)

1 (3.0%)

.338

 Previous asthma

5 (5.1%)

2 (3.2%)

4 (12.1%)

.186

 CAT score

11.16 ± 5.40

13.90 ± 6.53

14.42 ± 7.00

.010

 SGRQ score

20.05 ± 10.43

29.95 ± 14.44

27.55 ± 15.24

.000

  1. BMI body mass index, COPD chronic obstructive pulmonary disease, CHD coronary heart disease, CAT COPD Assessment Test, SGRQ St.George's Respiratory Questionnaire