Diaphragmatic parameters by ultrasonography for predicting weaning outcomes

BMC Pulmonary Medicine

Table 4 Correlation coefficient among parameters

	TV	VC	RSBI	PI_MAX
Diaphragmatic inspiratory excursion	0.445*	0.217	−0.435*	0.077
TPIA_dia	0.639*	0.522*	− 0.703*	0.250
DTD	0.045	−0.017	−0.260^π	0.166
TFdi	0.001	0.117	−0.218	0.237

TV Tidal volume, VC vital capacity, RSBI rapid shallow breathing index, PI_MAX Maximum peak inspiratory pressure, TPIA_dia time to peak inspiratory amplitude, DTD diaphragmatic thickness difference, TFdi diaphragm thickening fraction
*P value < 0.01
^πP value < 0.05

ISSN: 1471-2466