Table 2.

Ultrasonic variables of automatic speckle tracking and manual measurement between weaning-failure and weaning-success groups

	Weaning-success N = 50	Weaning-failure N = 38	p value
Automatic measurement
Mean excursion, cm	1.5 ± 0.8	1.1 ± 0.6	0.0163
Max excursion, cm	1.6 ± 0.9	1.2 ± 0.6	0.0143
Min excursion, cm	1.3 ± 0.8	1.0 ± 0.6	0.0270
Manual measurement
Excursion, cm	0.9 ± 0.4	0.9 ± 0.7	0.6681
Automatic measurement
Max velocity, cm/s	1.2 ± 0.7	1.0 ± 0.6	0.1837
Min velocity, cm/s	0.9 ± 0.7	0.8 ± 0.5	0.2747
Mean velocity, cm/s	1.0 ± 0.7	0.9 ± 0.5	0.2437
Manual measurement
Velocity, cm/s	1.4 ± 0.7	1.4 ± 0.8	0.8011