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Table 1 Comparison between IPF patients and control groups regarding demographic and clinical data

From: Telomeric repeat-containing ribonucleic acid (TERRA) expression in patients with idiopathic pulmonary fibrosis

Variables

IPF patients group (n_30)

Control group (n_30)

Test of significance

P-value

Age (years)

 Mean ± SD

63.40 ± 5.58

62.90 ± 9.91

t = 0.241

0.811

Sex

 Male

23-(76.7%)

23-(76.7%)

χ2 = 0.00

1.00

 Female

7-(23.3%)

7-(23.3%)

Smoking

 Smoker

21 (70%)

14 (46.7%)

χ2 = 3.36

0.067

 Nonsmoker

9 (30%)

16 (53.3 %)

Occupation

 Non-worker

13 (43.3%)

9 (30%)

MC

0.603

 Manual worker

14 (46.7%)

18 (60%)

 Professional worker

3 (10%)

3 (10%)

Dyspnea grade

 0

1 (3.3%)

27 (90%)

MC

≤ 0.001*

 1

4 (13.3%)

3 (10%)

 2

12 (40.0%)

0 (0%)

 3

11 (36.7%)

0 (0%)

 4

2 (6.7%)

0 (0%)

Cough grade

 0

1 (3.3%)

24 (80%)

MC

≤ 0.001*

 1

13 (43.3%)

6 (20%)

 2

16 (53.3%)

0 (0%)

  1. t Student t-test, χ2 Chi square test, MC Monte Carlo test
  2. *Significant p < 0.05