Table 2.

Diaphragm measurements of the patients with both devices.

	SD (mean ± SD) (min-max)	PSD (mean ± SD) (min-max)	p	ICC∗∗
Tidal expiratory thickness (cm)	0.27 ± 0.08	0.29 ± 0.11	∗	∗∗
	(0.13–0.46)	(0.13–0.61)
Tidal inspiratoy thickness (cm)	0.37 ± 0.13	0.38 ± 0.14	∗	∗∗
	(0.19–0.85)	(0.20–0.70)
Maximal inspiratory thickness (cm)	0.47 ± 0.16	0.45 ± 0.12	∗	∗∗
	(0.23–0.68)	(0.24–0.91)
Tidal thickening fraction (%)	33 ± 17	34 ± 14	∗	∗∗
	(3–77)	(10–59)
Maximal thickening fraction, %	69 ± 38	65 ± 31	∗	∗∗
	(8–150)	(20–130)
Tidal diaphragm excursion (cm)	1.76 ± 0.69	1.62 ± 0.70	∗	∗∗
	(0.58–3.30)	(0.50–3.00)
Maximal diaphragm excursion (cm)	2.97 ± 1.18	2.67 ± 0.90	a	b
	(1.33–5.40)	(1.30–4.70)

SD: standard deviation; cm: centimeter; min-max: minimum-maximum; ^∗there were no significant proportional bias, and there was good agreement between the devices' measurements (a); ^∗∗interobserver correlation coefficient > 0.9 and p < 0.05; a: p value > 0.05; b: p value < 0.05.