Table 1 Patient characteristics and NIV data

No. of females (%)

62 (45%)

Age (years)

67.0 ± 7.8

Body-mass index (kg/m²)

27.9 ± 8.2

Smoking status (n; active:prior)

29:108

(%; active:prior)

21.2:78.8

Smoking index (Pack Years)

56.3 ± 24.9

Time under NIV (years)

2.1 ± 2.6

Supplemental Oxygen (n; yes:no)

117: 22

(%; yes:no)

84.2:15.8

 LTOT (l/min during rest; n = 117)

2.1 ± 0.8

NIV initiation

 Chronic elective NIV

59 (43%)

 Following acute NIV

73 (53%)

 NIV following prolonged weaning

5 (4%)

Ventilator settings

 IPAP (cmH₂O)

23.6 ± 4.6

 EPAP (cmH₂O)

5.9 ± 1.3

 BF (per minute)

16.5 ± 2.4

 Adherence (mean hours per day)

6.5 ± 3.1

 Compliance* (n; compliant: not compliant)

109:28

 (%; compliant, not compliant)

79.6:20.4