Replacement of fluoroscopy by ultrasonography in the evaluation of hemidiaphragm function, an exploratory prospective study

The Ultrasound Journal

Table 2 Linear correlation coefficients and Pearson correlation coefficients of M-mode ultrasound-and fluoroscopic measures of the right hemidiaphragm excursion during maximal inspiration capacity inspiration and sniff inspiration

Right hemidiaphragm	Midclavicular view	Linear regression						Pearson correlation coefficient
Right hemidiaphragm	Midclavicular view	Coef	Std	t	p-value	95% CI		Pearson correlation coefficient
FEV1
IC inspiration	Fluoroscopy	0.21	0.07	2.89	0.01	0.06	0.35	0.57
IC inspiration	M-mode	0.26	0.11	2.46	0.02	0.04	0.48	0.53
Sniff inspiration	Fluoroscopy	0.24	0.15	1.58	0.13	− 0.07	0.54	0.42
	M-mode	0.38	0.23	1.63	0.12	− 0.11	0.87	0.50
	Velocity	0.10	0.08	1.33	0.20	− 0.06	0.27	0.41
FVC
IC inspiration	Fluoroscopy	0.23	0.08	2.94	0.01	0.07	0.39	0.60
IC inspiration	M-mode	0.19	0.12	1.51	0.14	− 0.07	0.44	0.55
Sniff inspiration	Fluoroscopy	0.18	0.17	1.05	0.30	− 0.17	0.52	0.49
	M-mode	0.41	0.23	1.77	0.10	− 0.08	0.91	0.27
	Velocity	0.12	0.09	1.35	0.20	− 0.06	0.30	0.33

CI Confidence interval, FEV1 Forced expiratory volume in one second, FVC Forced vital capacity, Std. Standard deviation