Quantitative Approach Based on Wearable Inertial Sensors to Assess and Identify Motion and Errors in Techniques Used during Training of Transfers of Simulated c-Spine-Injured Patients

Table 1

Performance and quality indicators for the log-roll.

Category	Indicator	Equation	Description
Performance measure	ROMrelpeak	Max(ROMrel)	Peak change in global orientation of the head relative to the trunk
Temporal quality indicators	Delayroll_ini		Delay at roll initiation
	Delayroll_end		Delay at roll termination
	Delaypush_ini		Delay at push initiation
	Delaypush_end		Delay at push termination
Spatial quality indicators	SlopeRoll		Difference between the slope of the best-fit line of the roll curve and the ideal line of identify
	SlopePush		Difference between the slope of the best-fit line of the push curve and the ideal line of identity
	ABCRoll-Push		Area contained between the curves from the roll and the push phases