Table 4.

Cross-validated elastic net regression results, for models of BBS and MMSE based on thigh or torso mounted IMUs during the FTSS test

Condition	Torso sensor BBS model					Torso sensor MMSE model
Model	N	R2	RMSE	ρ	DoF	N	R2	RMSE	ρ	DoF
All	168	0.45	3.17	0.68	20	168	0.31	1.60	0.55	16
Male	51	0.74	2.53	0.71	20	51	0.22	1.71	0.60	9
Female	117	0.57	2.60	0.70	17	117	0.34	1.53	0.54	11
Mean (Male/Female)		0.65	2.57	0.70	20		0.28	1.62	0.57	11

Note. Results are evaluated using coefficient of determination (R²), root mean square error (RMSE), Spearman’s rank correlation (ρ), and the number of features in the model (DoF). The number of participants included in each analysis (N) is also listed.

Abbreviations: BBS, Berg balance scale; FTSS, five times sit-to-stand test; IMU, inertial measurement unit; MMSE, Mini-Mental State Examination.