Table 3 Baseline and follow-up diaphragmatic excursion in quiet breathing among studied patients with different etiologies of chronic respiratory failure

Overlap syndrome

n = 15

n = 15

n = 14

n = 12

n = 11

Min.–max

1.25–2.40

1.20–2.50

1.40–2.80

1.50–3.0

2.40–3.30

Mean ± SD

1.81 ± 0.37

1.90 ± 0.42

2.11 ± 0.42

2.39 ± 0.40

2.74 ± 0.32

^tp

0.048*

0.001*

< 0.001*

< 0.001*

OHS

n = 14

n = 14

n = 14

n = 12)

n = 11

Min.–max

1.40–2.50

1.40–2.50

1.50–2.60

1.40–2.80

1.50–3.30

Mean ± SD

1.96 ± 0.35

2.04 ± 0.36

2.14 ± 0.37

2.22 ± 0.43

2.62 ± 0.50

^tp

0.003*

< 0.001*

< 0.001*

< 0.001*

COPD

n = 6

n = 6

n = 5

n = 5

n = 5

Min.–max

1.50–2.10

1.70–2.20

1.70–2.30

2.0–2.50

2.50–3.0

Mean ± SD

1.78 ± 0.23

1.93 ± 0.20

2.04 ± 0.23

2.34 ± 0.21

2.72 ± 0.19

^tp

0.007*

0.004*

0.004*

 < 0.001*

RTD

n = 9)

n = 9

n = 9

n = 9

n = 8

Min.–max

1.50–2.20

1.50–2.40

1.60–2.40

1.60–2.50

1.70–2.70

Mean ± SD

1.87 ± 0.26

1.99 ± 0.31

2.08 ± 0.25

2.24 ± 0.28

2.39 ± 0.30

^tp

0.010*

0.001*

< 0.001*

< 0.001*

NMDs

n = 4

n = 4

n = 4

n = 4)

n = 2

Min.–max

0.90–1.30

0.80–1.40

1.30–1.60

1.10–2.0

1.80–2.0

Mean ± SD

1.13 ± 0.17

1.18 ± 0.26

1.45 ± 0.13

1.50 ± 0.39

1.90 ± 0.14

^tp

0.391

0.001*

0.072

0.049*