Table 4.

Features of Balance Analyses

	Studies/parameters used to assess balance	Device	Clinical Test	Frailty Classification	Purpose
1	A. Chkeir et al. [10, 34] Rise Rate, Average Velocity of Trajectory Obtained From Reaction Force and CoP Trajectories	Balance Quality Testers (Bathroom Scales)	None	Frail and Non-Frail	Established the Relationship Among the Balance Parameter with the Fried Phenotype
2	Chang et al. [21] Balance	ePad and eReach	None	Pre-frail and Non-frail	Developed Frailty Model Using Artificial Neural Network.
3	A. Martinez-Ramirez et al. [69] Sway Area, Signal Patterns	Tri-Axial Inertial Sensor Unit	Quiet Standing Balance Test	Yes Pre-Classified According to the Fried phenotype	High Frequency Components Associated With Frailty Syndrome
4	G.M. Bertolotti et al. [35] Body Sway and Trunk Kinematics Data	Customized Inertial Sensor Unit (Gyro, and, Accelerometer)	Selected Tasks Performed from Tinetti Tests, Balance Evaluation Systems Test and Berg Balance	None	Validating the Use of Newly Developed Unit Against Balance Board and Marker-Based System.
5	Z. Lv et al. [40] CoM	Kinect	Double Leg Stance, sttar excursion balance Test	None	Validating Kinect V2 for Balance Measurement
6	A. Nalci et al. [79] Variation in pixel events	Camera	UPST	None	Developed Vision Based Model To Assess Balance