Gait oscillation analysis during gait and stair-stepping in elder patients with knee osteoarthritis

Table 2 Parameters between healthy adults and OA patients during gait and stair-stepping

	Gait		Step-up		Step-down
	Healthy adults	OA patients	Healthy adults	OA patients	Healthy adults	OA patients
Acceleration (m/s²)
To the anterior
Sacral region	8.19 ± 1.91	6.91 ± 3.08	7.14 ± 2.42	7.26 ± 2.96	7.62 ± 1.88	6.17 ± 2.52	Gait; healthy > OA, down; healthy>OA
Dorsal vertebral region	4.97 ± 1.56	5.60 ± 1.61	4.65 ± 1.21	6.98 ± 1.77	3.81 ± 1.40	6.75 ± 2.89	Stair-stepping; healthy < OA**
To the OA direction
Sacral region	5.88 ± 1.92	6.04 ± 4.35	4.35 ± 1.72	3.35 ± 1.87	5.54 ± 2.61	5.64 ± 3.78	Up; healthy > OA**
Dorsal vertebral region	3.71 ± 1.02	4.09 ± 2.45	3.14 ± 1.02	2.96 ± 1.93	3.92 ± 1.82	4.37 ± 2.60
To the contralateral direction
Sacral region	5.86 ± 2.21	5.04 ± 2.57	4.33 ± 1.72	3.47 ± 1.83	5.24 ± 2.73	5.42 ± 3.06	Up; healthy > OA*
Dorsal vertebral region	3.20 ± 1.33	3.72 ± 1.39	2.45 ± 0.89	2.87 ± 1.72	2.88 ± 1.38	3.65 ± 2.09	Stair-stepping; healthy <OA*
Single-support time (s)
OA side	0.52 ± 0.05	0.70 ± 0.23	0.57 ± 0.06	1.38 ± 1.20	0.55 ± 0.05	1.17 ± 0.57	Gait, stair-stepping; healthy < OA**
Contralateral side	0.53 ± 0.05	0.70 ± 0.20	0.58 ± 0.06	1.10 ± 0.55	0.55 ± 0.07	1.23 ± 0.80	Gait, stair-stepping; healthy < OA**
Single-support phase	0.99 ± 0.09	1.00 ± 0.17	0.99 ± 0.06	1.02 ± 0.29	0.99 ± 0.10	1.03 ± 0.38
Ratio of the center of gravity maximum values
Sacral region	0.76 ± 0.30	0.95 ± 0.47	0.75 ± 0.32	1.03 ± 0.69	0.80 ± 0.32	0.91 ± 0.73	Down; healthy < OA**
Dorsal vertebral region	0.64 ± 0.24	0.70 ± 0.50	0.40 ± 0.15	0.92 ± 0.75	0.39 ± 0.17	0.89 ± 0.68	Stair-stepping; healthy < OA**

ISSN: 1749-799X