Table 3 Pain characteristics from SF-MPQ according to key variables

Age

 < 60 years

1.5 (0–3.0)

0 (0–2.0)

2.5 (0–5.0)

3.0 (0–5.7)

2 (12.5)

9 (56.3)

5 (31.3)

 ≥ 60 years

1.0 (0–2.0)

0 (0–2.0)

2.0 (0–4.0)

3.0 (0–50)

3 (13.0)

13 (56.5)

7 (30.4)

 P-value

0.308

0.828

0.607

0.456

0.998

Gender

 Male

2.0 (0–3.0)

0 (0–2.25)

2.0 (0–5.0)

3.0 (0–6.0)

4 (16.7)

10 (41.7)

10 (41.7)

 Female

1.0 (0–2.0)

0 (0–2.0)

2.0 (0–4.0)

3.0 (0–4.5)

1 (6.7)

12 (80.0)

2 (13.3)

 P-value

0.344

0.969

0.541

0.906

0.063

Exposure history

 No

0.5 (0–2.0)

0 (0–2.0)

1.0 (0–4.0)

3.0 (0–3.8)

3 (13.6)

13 (59.1)

6 (27.3)

 Yes

2.0 (0–3.0)

1.0 (0–4.0)

3.0 (0–6.0)

5.0 (0–6.0)

2 (11.8)

9 (52.9)

6 (35.3)

 P-value

0.01

0.057

0.505

0.143

0.865

6MWD

 < 250 m

0.5 (0–2.0)

0 (0–2.0)

1.0 (0–4.0)

3.0 (0–3.8)

2 (40.0)

1 (20.0)

2 (40.0)

 ≥ 250 m

2.0 (0–3.0)

1.0 (0–4.0)

3.0 (0–6.0)

5.0 (0–6.0)

0 (11.1)

15 (88.9)

3 (16.7)

 P-value

0.849

0.633

0.406

0.824

0.005

mMRC score

 0–1

0 (0–1.0)

0 (0–0.5)

0 (0–1.5)

0 (0–3.4)

1 (14.3)

3 (42.9)

3 (42.9)

 02-Apr

2.0 (0–2.0)

1.0 (0–2.0)

3.0 (1.0–5.0)

3.0 (0–5.3)

4 (12.5)

19 (59.4)

9 (28.1)

 P-value

0.014

0.037

0.006

0.104

0.706

FVC, % predicted

 < 80

1.0 (0–2.0)

0 (0–2.0)

2.0 (0–5.0)

3.0 (0–5.0)

4 (18.2)

13 (59.1)

5 (22.7)

 ≥ 80

1.5 (0–2.0)

0 (0–2.0)

2.0 (0–4.3)

3.0 (0–5.3)

1 (12.5)

6 (75.0)

1 (12.5)

 P-value

0.728

0.908

0.955

0.605

0.721

DLCO, % predicted

 < 45

2.0 (0–2.5)

0 (0–2.5)

3.0 (1.0–5.0)

3.0 (0–5.3)

2 (11.1)

12 (66.7)

4 (22.2)

 ≥ 45

1.0 (0–2.0)

0 (0–2.0)

1.0 (0–4.0)

3.0 (0–5.0)

3 (27.3)

6 (54.5)

2 (18.2)

 P-value

0.231

0.517

0.099

0.333

0.535

FEV1/FVC, %

 < 70

3.0 (2.0–4.0)

3.0 (2.0–4.0)

5.0 (4.0–8.0)

6.0 (3.0–7.0)

5 (19.2)

17 (65.4)

4 (15.4)

 ≥ 70

2.5 (2.0–3.0)

1.5 (0–3.7)

4.0 (3.0–5.7)

6.0 (3.5–7.0)

0

2 (50.0)

2 (50.0)

 P-value

0.225

0.169

0.999

0.598

0.226