Comparisons of two diaphragm ultrasound-teaching programs: a multicenter randomized controlled educational study

The Ultrasound Journal

Table 1 Correlation between tutors and learners for each DUS parameter and correlation comparison between groups

Parameter	Intervention group			Control group			Correlation comparison
Parameter	Learners (n)	ρ [95% CI]	p value	Learners (n)	ρ [95% CI]	p value	z value	p value
DD	80	0.973 [0.958–0.983]	< 0.0001	50	0.802 [0.675–0.883]	< 0.0001	− 5627	< 0.0001
Thick_insp	81	0.949 [0.921–0.976]	< 0.0001	58	0.209 [− 0.052–0.444]	0.115	− 9.141	< 0.0001
Thick_exp	81	0.938 [0.905–0.960]	< 0.0001	58	0.310 [0.057–0.526]	0.018	− 7.955	< 0.0001
TF	81	0.975 [0.961–0.960]	< 0.0001	58	− 0.028 [− 0.284–0.232]	0.836	− 12.061	< 0.0001

DUS, diaphragm ultrasound; ρ, correlation coefficient; 95% CI, 95% confidence interval; DD, diaphragm displacement; Thick_insp, diaphragm thickness at inspiration; Thick_exp, diaphragm thickness at expiration; TF, thickening fraction