Table 2.

Predictive validity of gait characteristics using univariate logistic regression (n = 112).

Independent variables	Mean ± SD	p value	SE	Spe	Sen	Acc
Step length at TD/BH	0.33 ±0.10	0.036*	3.55	68.4	54.5	61.6
Step width at TD/BH	0.10 ±0.03	0.642	7.26	63.2	32.7	48.2
Gait speed (m/s)	1.13 ±0.18	0.291	1.08	64.9	45.5	55.4
COM relative position at TD/BH	0.19 ±0.06	0.003*	7.12	63.2	63.6	63.4
COM relative velocity at TD (m/s)	1.17 ±0.20	0.313	0.99	66.7	47.3	57.1
Trunk angle at TD (rad)	1.53 ±0.08	0.562	2.51	66.7	36.4	51.8
R thigh angle at TD (rad)	1.94 ±0.12	0.006*	2.17	66.7	63.6	65.2
R shank angle at TD (rad)	1.79 ±0.15	0.128	1.47	50.9	52.7	51.8
R foot angle at TD (rad)	0.18 ±0.12	0.130	1.57	64.9	49.1	57.1
Trunk velocity at TD (rad/s)	0.31 ±0.22	0.939	0.88	100	0	50.9
R thigh velocity at TD (rad/s)	0.36 ± 0.52	0.171	6.7	66.7	47.3	57.1
R shank velocity at TD (rad/s)	−2.02 ± 0.65	0.025*	0.32	66.7	60.0	63.4
R foot velocity at TD (rad/s)	−3.62 ±1.56	0.019*	0.13	59.6	56.4	58.0
L foot AP acc in pre-LO (m/s2)	16.1 ±5.3	0.886	0.04	100	0	50.9
L foot VT acc in pre-LO (m/s2)	9.0 ± 3.4	0.317	0.06	54.4	47.3	50.9
R AP GRF in post-TD/BM	−1.33 ±0.57	0.105	0.34	61.4	52.7	57.1
R VT GRF in post-TD/BM	7.07 ±2.19	0.829	0.09	75.4	32.7	54.5
L AP GRF in pre-LO/BM	1.48 ±0.48	0.382	0.39	58.6	41.8	50.9
L VT GRF in pre-LO/BM	8.69 ±1.71	0.031*	0.11	68.4	47.3	58.0
MMT at TD (kg·m/s)	87.8 ±19.9	0.023*	0.01	68.4	52.7	60.7
MMT at LO (kg·m/s)	71.5 ±15.5	0.121	0.01	68.4	43.6	56.3
MMT from TD to LO (kg·m/s)	−16.3 ±10.7	0.002*	0.03	73.7	63.6	68.8

^*Denotes p value < 0.05.

TD: Right foot touchdown; LO: Left foot lift off; BH: body height; BM: body mass; AP: anteroposterior; VT: vertical; MMT: momentum; SE: standard error; Spe: specificity in percentage; Sen: sensitivity in percentage; and Acc: overall accuracy in percentage. Specificity denotes recovery prediction and sensitivity denotes fall prediction.