Table 4 Baseline and follow-up diaphragmatic excursion in deep 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

2.90–6.30

3.0–6.30

3.0–6.50

3.10–6.50

4.80–6.50

Mean ± SD

4.65 ± 1.04

4.70 ± 1.09

5.03 ± 1.04

5.39 ± 0.95

5.75 ± 0.55

^tp

0.318

< 0.001*

< 0.001*

0.001*

OHS

n = 14

n = 14

n = 14

n = 12

n = 11

Min.–max

3.40–5.80

3.50–5.80

3.50–6.0

3.50–6.10

3.80–6.30

Mean ± SD

4.43 ± 0.74

4.53 ± 0.74

4.69 ± 0.77

4.85 ± 0.82

5.26 ± 0.72

^tp

< 0.001*

< 0.001*

< 0.001*

< 0.001*

COPD

n = 6

n = 6

n = 5

n = 5

n = 5

Min.–max

3.40–4.80

3.60–5.0

3.60–5.30

4.0–5.50

4.0–6.10

Mean ± SD

3.90 ± 0.52

4.07 ± 0.55

4.38 ± 0.62

4.66 ± 0.61

5.16 ± 0.82

^tp

0.004*

0.012*

0.006*

0.003*

RTD

n = 9

n = 9

n = 9

n = 9

n = 8

Min.–max

2.50–6.0

2.50–6.0

2.60–6.10

2.60–6.20

2.70–6.50

Mean ± SD

4.68 ± 1.12

4.86 ± 1.14

4.96 ± 1.06

5.13 ± 1.09

5.30 ± 1.14

^tp

0.014*

0.012*

0.003*

0.002*

NMDs

n = 4

n = 4

n = 4

n = 4

n = 2

Min.–max

2.50–3.30

2.30–3.50

2.80–3.80

2.50–4.20

3.70–4.20

Mean ± SD

2.85 ± 0.34

2.90 ± 0.50

3.25 ± 0.44

3.23 ± 0.71

3.95 ± 0.35

^tp

0.604

0.006*

0.166

0.037*