Table 2 Comparison of PFTs sleep questionnaire and sleep parameter between both groups

PRE FEV1 (%predicted)

60 (29–82)

52 (28–79)

−4.1

< 0.001**

PRE FVC (%predicted)

68 (40–80)

59 (32–73)

− 2.4

0.016*

Post FEV1 (%predicted)

68 (33–84)

59 (31–80)

− 3.9

0.00008**

SBQ

3 (2–5)

4 (3–7)

−2.8

0.005*

ESS

18 (11–24)

22 (11–24)

− 2.7

0.007*

mMRC

2 (2–3)

3 (2–4)

− 2.5

0.01*

Sleep efficiency

66.5 (33.7–80)

65.4 (17.5–79)

− 0.2

0.81

AHI

16.1 (3–65.2)

26.8 (4–106.8)

−2.1

0.04*

RDI

16.2 (5–65.2)

26.8 (7–106.8)

− 2.3

0.022*

ODI

15.8 (0.5–84.9)

44.4 (1.1–116.1)

−  2.9

0.003*