基于加速度信号的功能性踝关节不稳者动态姿势稳定性评价方法

doi:10.3969/j.issn.1006-9771.2023.06.005

《中国康复理论与实践》 ›› 2023, Vol. 29 ›› Issue (6): 654-666.doi: 10.3969/j.issn.1006-9771.2023.06.005

• 专题运动功能与身体活动评定 • 上一篇下一篇

基于加速度信号的功能性踝关节不稳者动态姿势稳定性评价方法

黄冬旭¹^,², 李依诺¹, 李秋捷¹, 杨辰³, 万祥林¹()

1.北京体育大学，北京市 100084
2.大连大学，辽宁大连市 116622
3.南京体育学院，江苏南京市 210014

收稿日期:2023-03-15 修回日期:2023-05-22 出版日期:2023-06-25 发布日期:2023-07-14
通讯作者: 万祥林(1988-)，男，汉族，江西九江市人，博士，副教授。E-mail： wanxianglin@bsu.edu.cn
作者简介:黄冬旭(1996-)，男，汉族，吉林长春市人，硕士，助教，主要研究方向：运动生物力学。
基金资助:
中央高校基本科研业务费专项基金项目(20212057)

Evaluation method of dynamic postural stability for functional ankle instability based on acceleration signals

HUANG Dongxu¹^,², LI Yinuo¹, LI Qiujie¹, YANG Chen³, WAN Xianglin¹()

1. Beijing Sport University, Beijing 100084, China
2. Dalian University, Dalian, Liaoning 116622, China
3. Nanjing Institute of Physical Education and Sports, Nanjing, Jiangsu 210014, China

Received:2023-03-15 Revised:2023-05-22 Published:2023-06-25 Online:2023-07-14
Contact: WAN Xianglin, E-mail: wanxianglin@bsu.edu.cn
Supported by:
Basic Scientific Research Funds of the Central Universities(20212057)

摘要/Abstract

摘要：

目的基于身体不同位置的加速度信号，比较采用不同算法获取的评价功能性踝关节不稳(FAI)者动态姿势稳定性指标的重测信度和鉴别效度。
方法 2021年4月至6月于北京体育大学招募21例单侧FAI患者和21例踝关节正常者。3个惯性传感器粘贴于腰点、膝和踝位置。通过三维测力台和惯性传感器同步采集受试者多方向单腿落地测试中的地面反作用力(GRF)和运动学数据。采用无界三阶多项式(UTOP)拟合法计算稳定时间，通过均方根值计算稳定指数。
结果基于加速度信号与基于GRF计算的大部分指标相关，但相关系数较低(|r| = 0.116~0.368, P < 0.05)。基于身体不同位置的加速度信号得到的稳定时间和稳定指数表现出低到高的重测信度(CMC 0.30~0.91)。对女性受试者，基于加速度信号的稳定时间中，有11个评价指标达到一般至很高的鉴别效度(AUC = 0.702~0.942, P < 0.05)；稳定指数中，有8个指标达到一般水平的鉴别效度(AUC = 0.717~0.782, P < 0.05)。不同算法在男性受试者中未取得良好的鉴别效果。
结论基于腰点位置的加速度信号并应用UTOP算法计算的稳定时间，能够评价女性FAI患者单腿落地动作的动态姿势稳定性，具有较高的鉴别效度和中等至高的重测信度。

关键词: 功能性踝关节不稳, 惯性传感器, 姿势稳定性, 加速度信号

Abstract:

Objective To compare the retest reliability and discriminant validity of dynamic postural stability indices for functional ankle instability (FAI) obtained by different algorithms based on acceleration signals at different positions of human body.
Methods From April to June, 2021, 21 subjects with unilateral FAI and 21 subjects with normal ankle were recruited. Three inertial sensors were attached to the waist points, knee and ankle positions. The ground reaction force (GRF) and kinematics data of the subjects in multi-direction single leg landing test were collected synchronously by 3D force plate and inertial sensors. The unbounded third order polynomial (UTOP) fitting method was used to calculate the stability time, and the root mean square was used to caculate the stability index.
Results Most of the indicators calculated based on acceleration signal correlated with that based on GRF with low coefficient (|r| = 0.116 to 0.368, P < 0.05). The stability time and stability index based on the acceleration signals of different positions of human body showed low to high retest reliability (CMC 0.30 to 0.91). For the females, among the stability time based on acceleration signal, eleven indexes achieved average to very high discriminant validity (AUC = 0.702 to 0.942, P < 0.05); eight of the stability indexes reached general level of discriminant validity (AUC = 0.717 to 0.782, P < 0.05). No algorithms achieved good discriminant effect in male subjects.
Conclusion Based on the acceleration signal of waist point in single-leg landing stability test, the stability time calculated by UTOP algorithm can evaluate the dynamic postural stability of female FAI patients with high discriminant validity and medium to high retest reliability.

Key words: functional ankle instability, inertial sensor, postural stability, acceleration signal

中图分类号:

R684.7

黄冬旭, 李依诺, 李秋捷, 杨辰, 万祥林. 基于加速度信号的功能性踝关节不稳者动态姿势稳定性评价方法[J]. 《中国康复理论与实践》, 2023, 29(6): 654-666.

HUANG Dongxu, LI Yinuo, LI Qiujie, YANG Chen, WAN Xianglin. Evaluation method of dynamic postural stability for functional ankle instability based on acceleration signals[J]. 《Chinese Journal of Rehabilitation Theory and Practice》, 2023, 29(6): 654-666.

图/表 11

表1

图1

表2

表3

表4

基于加速度计算的SI和TTS的重测信度"

加速度计位置	性别	落地方向	执行次数	SI			TTS
加速度计位置	性别	落地方向	执行次数	前后	内外	垂直	前后	内外	垂直
腰点	男	向前	1	0.61±0.62	1.55±1.53	1.98±1.83	0.54±0.41	1.23±0.81	1.33±0.86
			2	0.70±0.69	1.63±1.39	2.28±1.88	0.55±0.42	1.29±0.86	1.30±0.90
			3	0.62±0.48	1.70±1.33	2.45±1.92	0.58±0.42	1.23±0.90	1.30±0.90
		CMC		0.64	0.72	0.53	0.74	0.87	0.83
		向侧	1	0.60±0.59	1.60±1.38	2.04±1.75	0.60±0.46	1.15±0.86	1.25±0.93
			2	0.55±0.49	1.56±1.35	2.14±1.82	0.57±0.45	1.22±0.88	1.18±0.89
			3	0.60±0.53	1.67±1.45	2.18±1.86	0.62±0.45	1.12±0.84	1.18±0.90
		CMC		0.79	0.79	0.73	0.78	0.73	0.69
		向后	1	0.41±0.38	1.08±1.05	1.54±1.46	0.61±0.40	1.15±0.80	1.36±0.93
			2	0.46±0.36	1.20±0.98	1.95±1.56	0.62±0.41	1.19±0.78	1.28±0.92
			3	0.50±0.39	1.19±0.97	1.90±1.49	0.58±0.39	1.11±0.82	1.33±0.96
		CMC		0.67	0.79	0.70	0.75	0.65	0.84
	女	向前	1	1.00±0.75	2.15±1.53	2.82±1.35	0.86±0.39	1.41±0.62	1.61±0.57
			2	1.10±1.01	2.15±1.58	2.71±1.49	0.87±0.37	1.36±0.61	1.71±0.60
			3	0.93±0.75	1.89±1.33	2.55±1.33	0.78±0.38	1.34±0.62	1.64±0.64
		CMC		0.76	0.84	0.65	0.78	0.84	0.74
		向侧	1	0.85±0.59	2.10±1.39	2.84±1.61	0.77±0.29	1.35±0.54	1.60±0.58
			2	0.83±0.36	2.30±1.21	3.13±1.45	0.75±0.31	1.31±0.56	1.63±0.55
			3	0.76±0.47	2.02±1.34	2.73±1.48	0.75±0.30	1.34±0.63	1.66±0.58
		CMC		0.72	0.83	0.70	0.62	0.87	0.58
		向后	1	0.66±0.45	1.50±1.22	2.54±1.63	0.83±0.42	1.30±0.68	1.77±0.79
			2	0.69±0.40	1.58±1.11	2.78±1.50	0.82±0.38	1.33±0.70	1.63±0.87
			3	0.74±0.55	1.60±1.29	2.87±1.46	0.77±0.43	1.30±0.77	1.64±0.85
		CMC		0.70	0.91	0.74	0.65	0.75	0.64
膝	男	向前	1	3.65±3.53	1.32±1.11	2.26±2.06	1.55±1.21	1.21±0.81	1.07±0.75
			2	4.11±3.53	1.52±1.15	2.54±2.10	1.58±1.21	1.23±0.86	1.11±0.82
			3	4.43±3.76	1.66±1.20	2.63±2.10	1.63±1.20	1.20±0.87	1.07±0.77
		CMC		0.74	0.57	0.69	0.81	0.87	0.69
		向侧	1	4.32±3.72	1.53±1.20	2.31±2.02	1.44±1.28	1.16±0.84	1.12±0.86
			2	4.43±3.80	1.56±1.17	2.41±2.00	1.59±1.33	1.21±0.83	1.05±0.80
			3	4.23±3.85	1.45±1.16	2.41±2.03	1.69±1.41	1.16±0.85	1.02±0.79
		CMC		0.84	0.59	0.70	0.70	0.71	0.72
		向后	1	3.06±3.18	1.13±1.10	1.81±1.66	1.61±1.22	1.15±0.77	1.02±0.75
			2	3.25±2.69	1.24±0.95	2.05±1.61	1.58±1.16	1.18±0.81	1.05±0.80
			3	3.44±2.97	1.35±1.12	2.22±1.71	1.65±1.23	1.13±0.80	0.99±0.75
		CMC		0.82	0.70	0.72	0.76	0.79	0.69
	女	向前	1	6.52±3.57	2.43±1.21	4.05±2.19	2.14±1.14	1.71±0.73	1.61±0.59
			2	5.81±3.51	2.22±1.34	3.59±2.33	1.96±1.07	1.81±0.66	1.66±0.69
			3	5.97±3.45	2.20±1.16	3.70±2.12	2.18±1.06	1.72±0.60	1.54±0.60
		CMC		0.74	0.70	0.76	0.79	0.73	0.55
		向侧	1	5.87±3.57	2.10±1.17	3.29±1.96	2.32±1.08	1.72±0.53	1.56±0.61
			2	6.63±3.23	2.35±1.19	3.81±1.93	2.42±0.98	1.72±0.52	1.56±0.71
			3	6.29±3.15	2.16±1.10	3.61±1.93	2.28±0.98	1.71±0.60	1.57±0.60
		CMC		0.66	0.74	0.71	0.71	0.73	0.64
		向后	1	5.21±3.62	1.87±1.27	3.34±1.97	1.89±1.10	1.53±0.74	1.42±0.75
			2	5.43±3.59	1.93±1.10	3.34±1.85	2.04±1.13	1.47±0.72	1.42±0.83
			3	4.84±3.43	1.82±1.34	3.26±1.91	2.00±1.18	1.45±0.80	1.32±0.77
		CMC		0.85	0.87	0.81	0.73	0.76	0.65
踝	男	向前	1	1.70±1.94	1.40±1.35	2.39±1.92	1.33±1.01	0.69±0.55	0.72±0.66
			2	1.55±1.60	1.43±1.19	2.41±1.95	1.34±1.05	0.63±0.52	0.78±0.67
			3	1.58±1.60	1.53±1.32	2.56±2.07	1.29±0.97	0.73±0.65	0.73±0.66
		CMC		0.52	0.82	0.56	0.79	0.61	0.78
		向侧	1	1.40±1.21	1.29±1.05	2.58±2.16	1.35±1.03	0.80±0.65	0.70±0.64
			2	1.43±1.12	1.30±0.98	2.75±2.19	1.35±1.08	0.82±0.67	0.71±0.62
			3	1.48±1.26	1.25±1.01	2.67±2.28	1.47±1.12	0.77±0.65	0.71±0.67
		CMC		0.70	0.72	0.71	0.69	0.86	0.70
		向后	1	1.37±1.33	1.05±0.87	1.91±1.64	1.17±0.92	0.87±0.63	0.69±0.60
			2	1.65±1.82	1.12±0.80	2.20±1.62	1.15±0.84	0.81±0.62	0.65±0.68
			3	1.40±1.33	1.21±1.00	2.17±1.61	1.20±0.98	0.81±0.63	0.68±0.67
		CMC		0.54	0.48	0.72	0.70	0.69	0.57
	女	向前	1	2.26±1.82	2.04±1.24	3.52±2.27	1.50±0.70	0.79±0.44	0.97±0.59
			2	2.20±1.73	1.95±1.16	3.39±2.15	1.59±0.75	0.75±0.39	0.96±0.60
			3	2.02±1.88	1.74±1.00	3.25±1.95	1.51±0.78	0.76±0.45	1.01±0.66
		CMC		0.30	0.67	0.77	0.50	0.52	0.69
		向侧	1	1.91±1.79	1.54±0.95	3.11±1.87	1.77±0.71	0.85±0.38	0.99±0.52
			2	2.23±2.21	1.56±1.00	3.54±1.79	1.79±0.75	0.87±0.39	0.96±0.53
			3	2.19±2.08	1.49±0.94	3.52±2.01	1.66±0.73	0.89±0.42	0.98±0.52
		CMC		0.35	0.72	0.69	0.70	0.49	0.45
		向后	1	2.18±1.92	1.48±1.08	3.09±1.88	1.47±0.75	0.83±0.43	0.90±0.62
			2	1.84±1.71	1.38±1.08	3.14±1.94	1.57±0.83	0.81±0.46	0.83±0.63
			3	1.70±1.74	1.46±1.17	2.84±1.95	1.48±0.79	0.79±0.45	0.81±0.64
		CMC		0.76	0.85	0.80	0.59	0.53	0.80

表4

表5

表6

不同组别之间基于加速度信号计算的SI比较"

落地方向	传感器位置	组别	男			女
落地方向	传感器位置	组别	APSI_ACC	MLSI_ACC	VSI_ACC	APSI_ACC	MLSI_ACC	VSI_ACC
向前落地	腰点^a	不稳组	0.78±0.37	2.48±1.30	2.97±1.33	1.09±0.69	2.48±1.37	2.98±1.36
	腰点^a	正常组	0.74±0.30	1.60±1.03	2.13±1.24	0.72±0.32	1.64±0.82	2.26±1.04
	膝^b	不稳组	5.46±2.86	2.05±0.85	3.19±1.53	6.97±3.43	2.64±1.32	4.23±2.28
	膝^b	正常组	3.57±2.10	1.69±0.89	2.56±1.52	5.08±2.72	1.74±0.72	3.03±1.61
	踝^c	不稳组	1.85±0.81	1.66±0.59	2.79±0.87	2.62±2.26	2.32±1.12	4.14±2.23
	踝^c	正常组	1.94±1.12	1.64±0.82	2.96±1.36	2.21±1.85	1.98±1.17	3.37±1.88
向侧落地	腰点^d	不稳组	1.00±0.58	2.62±1.27	3.08±1.43	0.98±0.55	2.69±1.70	3.22±1.70
	腰点^d	正常组	0.72±0.26	2.25±0.90	3.14±1.11	0.65±0.35	1.60±0.60	2.76±1.16
	膝^e	不稳组	5.90±3.36	2.24±0.91	3.43±1.64	7.48±3.44	2.67±1.31	4.49±2.37
	膝^e	正常组	6.20±2.75	2.11±0.60	3.17±1.43	5.67±2.87	1.89±0.74	3.10±1.38
	踝^f	不稳组	2.06±1.12	1.94±0.77	3.88±1.79	1.97±1.19	1.70±0.80	4.13±2.08
	踝^f	正常组	2.13±0.83	1.62±0.62	3.70±1.36	1.68±1.15	1.44±0.94	3.06±1.56
向后落地	腰点^g	不稳组	0.70±0.32	1.83±0.94	2.60±1.13	0.98±0.58	2.16±1.42	3.39±1.67
	腰点^g	正常组	0.61±0.24	1.59±0.77	2.46±0.77	0.59±0.24	1.24±0.51	2.44±0.96
	膝^h	不稳组	4.89±2.85	1.88±0.98	2.99±1.24	6.44±4.05	2.58±1.56	3.92±1.99
	膝^h	正常组	3.82±2.63	1.53±0.77	2.72±1.47	5.20±3.00	1.53±0.62	3.30±1.46
	踝ⁱ	不稳组	1.82±1.00	1.53±0.64	3.04±1.07	1.76±1.51	1.66±1.14	3.66±2.08
	踝ⁱ	正常组	1.63±1.00	1.34±0.56	2.61±1.03	1.70±1.56	1.34±0.67	2.88±1.39
	t值^a		0.401	2.594	2.271	2.648	2.879	2.327
	P值^a		0.690	0.013	0.028	0.010	0.006	0.023
	t值^b		2.602	1.441	1.443	2.365	3.290	2.359
	P值^b		0.012	0.156	0.156	0.021	0.002	0.022
	t值^c		-0.317	0.084	-0.494	0.766	1.145	1.442
	P值^c		0.753	0.933	0.624	0.447	0.257	0.155
	t值^d		2.346	1.306	-0.184	2.925	3.462	1.304
	P值^d		0.022	0.197	0.855	0.005	< 0.001	0.197
	t值^e		-0.368	0.649	0.665	2.322	2.970	2.919
	P值^e		0.715	0.519	0.509	0.023	0.004	0.005
	t值^f		-0.267	1.820	0.429	1.013	1.212	2.350
	P值^f		0.791	0.074	0.670	0.315	0.230	0.022
	t值^g		1.186	1.113	0.580	3.527	3.506	2.844
	P值^g		0.241	0.270	0.564	< 0.001	< 0.001	0.006
	t值^h		1.511	1.544	0.761	1.418	3.612	1.423
	P值^h		0.136	0.128	0.450	1.161	< 0.001	0.160
	t值ⁱ		0.724	1.243	1.565	0.159	1.379	1.782
	P值ⁱ		0.472	0.219	0.123	0.874	0.173	0.080

表6

表7

不同组别之间基于加速度信号计算的TTS比较"

落地方向	传感器位置	组别	男			女
落地方向	传感器位置	组别	APTTS_ACC	MLTTS_ACC	VTTS_ACC	APTTS_ACC	MLTTS_ACC	VTTS_ACC
向前落地	腰点^a	不稳组	1.47±0.36	0.63±0.26	1.63±0.44	1.63±0.46	0.92±0.34	1.84±0.40
	腰点^a	正常组	1.55±0.20	0.62±0.13	1.67±0.25	0.92±0.28	0.59±0.16	1.53±0.30
	膝^b	不稳组	1.53±0.62	1.66±0.83	1.34±0.56	2.10±0.44	2.30±1.09	1.70±0.46
	膝^b	正常组	1.46±0.22	1.79±0.53	1.26±0.36	1.71±0.13	1.94±0.31	1.62±0.19
	踝^c	不稳组	0.86±0.31	1.62±0.63	0.97±0.57	0.78±0.27	1.64±0.65	1.02±0.44
	踝^c	正常组	0.91±0.20	1.89±0.22	0.99±0.26	0.73±0.18	1.40±0.38	0.70±0.26
向侧落地	腰点^d	不稳组	0.81±0.35	1.55±0.45	1.77±0.56	0.85±0.29	1.67±0.56	1.80±0.50
	腰点^d	正常组	0.84±0.17	1.70±0.39	1.57±0.45	0.61±0.11	0.88±0.26	1.42±0.30
	膝^e	不稳组	2.01±1.09	1.65±0.55	1.42±0.61	2.53±0.95	2.02±0.41	1.74±0.65
	膝^e	正常组	2.18±0.80	1.61±0.24	1.43±0.40	2.06±0.31	1.59±0.11	1.46±0.15
	踝^f	不稳组	1.63±0.82	1.06±0.59	0.94±0.57	1.66±0.68	0.96±0.29	1.05±0.47
	踝^f	正常组	2.19±0.40	1.08±0.20	0.94±0.42	1.68±0.42	0.75±0.18	0.70±0.22
向后落地	腰点^g	不稳组	0.84±0.18	1.50±0.38	1.76±0.45	0.92±0.28	1.70±0.44	2.06±0.45
	腰点^g	正常组	0.75±0.15	1.53±0.43	1.73±0.45	0.73±0.19	1.03±0.36	1.68±0.39
	膝^h	不稳组	2.19±0.79	1.58±0.52	1.60±0.48	2.37±1.03	1.91±0.53	1.67±0.58
	膝^h	正常组	2.07±0.60	1.49±0.23	1.23±0.44	2.00±0.38	1.42±0.20	1.36±0.26
	踝ⁱ	不稳组	1.48±0.69	1.05±0.44	0.95±0.54	1.76±0.51	0.84±0.27	0.86±0.43
	踝ⁱ	正常组	1.59±0.40	1.12±0.20	0.73±0.34	1.61±0.26	0.97±0.15	0.72±0.25
	t值^a		-1.035	0.296	-0.446	7.199	4.793	3.407
	P值^a		0.306	0.769	0.658	< 0.001	< 0.001	< 0.001
	t值^b		0.538	-0.654	0.552	4.753	1.724	0.956
	P值^b		0.593	0.517	0.584	< 0.001	0.090	0.343
	t值^c		-0.665	-1.967	-0.146	0.836	1.779	3.428
	P值^c		0.509	0.055	0.884	0.407	0.080	< 0.001
	t值^d		-0.382	-1.398	1.520	4.463	7.292	3.746
	P值^d		0.704	0.167	0.134	< 0.001	< 0.001	< 0.001
	t值^e		-0.704	0.325	-0.068	2.747	5.737	2.386
	P值^e		0.484	0.747	0.946	0.008	< 0.001	0.020
	t值^f		-3.325	-0.151	0.039	-0.124	3.525	3.915
	P值^f		0.002	0.880	0.969	0.902	< 0.001	< 0.001
	t值^g		2.180	-0.301	0.304	3.207	6.899	3.636
	P值^g		0.033	0.764	0.762	0.002	< 0.001	< 0.001
	t值^h		0.627	0.831	3.073	1.949	4.920	2.779
	P值^h		0.533	0.409	0.003	0.056	< 0.001	0.007
	t值ⁱ		-0.799	-0.814	1.927	1.519	-2.501	1.531
	P值ⁱ		0.427	0.419	0.059	0.134	0.015	0.131

表7

表8

表9

表10

参考文献 35

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组别		n	年龄/岁	身高/cm	体质量/kg	CAIT评分
不稳组	男	10	19.30±0.90	182.92±5.81	76.79±9.70	18.40±3.23
不稳组	女	11	21.75±3.92	163.12±4.23	59.91±7.14	16.00±4.64
正常组	男	10	20.20±1.31	176.33±4.71	75.56±8.47	29.40±1.20
正常组	女	11	23.20±2.14	163.3±6.03	57.55±5.09	29.00±1.21

落地方向	GRF/N	传感器位置	加速度/(m·s^-2)	r值	P值
向前落地	71.81±71.27	腰点	1.92±1.38	0.116	0.030
		膝	1.70±1.25	0.363	< 0.001
		踝	2.56±1.61	0.031	0.569
向侧落地	69.17±67.10	腰点	2.04±1.42	0.358	< 0.001
		膝	4.12±2.77	-0.341	< 0.001
		踝	2.46±1.55	0.140	0.006
向后落地	58.55±60.05	腰点	1.70±1.25	0.245	< 0.001
		膝	3.49±2.55	-0.228	< 0.001
		踝	2.13±1.46	0.054	0.292

性别	落地方向	执行次数	SI			TTS
性别	落地方向	执行次数	前后	内外	垂直	前后	内外	垂直
男	向前	1	48.00±32.95	8.17±6.15	157.83±105.75	1.44±0.88	0.49±0.30	2.69±1.63
		2	46.98±32.58	8.41±6.63	160.34±116.74	1.37±0.88	0.50±0.32	2.63±1.70
		3	47.45±33.49	8.54±6.76	154.06±113.33	1.41±0.86	0.46±0.33	2.58±1.68
	CMC		0.98	0.89	0.97	0.91	0.67	0.97
	向侧	1	11.13±9.01	34.16±27.62	133.66±98.23	0.59±0.41	1.17±0.80	2.44±1.62
		2	10.63±8.31	33.33±26.29	131.36±101.82	0.58±0.40	1.11±0.79	2.38±1.66
		3	10.80±8.44	32.93±27.57	130.97±103.31	0.55±0.40	1.14±0.83	2.37±1.67
	CMC		0.93	0.98	0.94	0.76	0.78	0.95
	向后	1	34.39±18.17	9.99±5.10	147.88±67.15	1.03±0.72	0.44±0.35	2.30±1.52
		2	36.05±20.41	10.23±5.49	143.10±65.88	1.06±0.76	0.44±0.35	2.22±1.53
		3	34.96±18.50	9.90±5.02	142.94±65.81	1.00±0.72	0.44±0.35	2.12±1.55
	CMC		0.96	0.9	0.89	0.81	0.69	0.73
女	向前	1	41.51±22.23	7.12±4.38	124.08±63.96	2.26±4.59	0.75±1.76	5.62±18.98
		2	40.67±21.49	6.79±4.21	125.35±68.08	2.50±6.24	0.86±2.50	6.46±24.86
		3	40.48±20.71	7.10±5.18	123.87±68.15	2.30±4.99	0.91±2.79	5.56±18.97
	CMC		0.96	0.90	0.91	0.97	0.65	0.92
	向侧	1	10.68±5.59	34.28±17.78	119.42±54.67	0.63±0.28	1.34±0.52	2.59±0.93
		2	10.29±5.17	34.21±17.91	121.50±56.67	0.64±0.27	1.30±0.58	2.58±1.02
		3	9.58±4.93	33.63±18.24	124.21±55.89	0.62±0.25	1.31±0.55	2.62±1.00
	CMC		0.90	0.97	0.90	0.73	0.89	0.89
	向后	1	27.01±12.85	8.06±3.84	118.47±52.03	1.19±0.48	0.55±0.23	2.55±0.90
		2	26.94±12.77	7.96±4.57	113.87±52.37	1.20±0.44	0.54±0.25	2.50±0.96
		3	26.30±12.23	8.21±4.51	114.48±53.38	1.18±0.44	0.53±0.23	2.49±0.96
	CMC		0.94	0.89	0.89	0.86	0.77	0.87

落地方向	性别	组别	APSI_GRF	MLSI_GRF	VSI_GRF	APTTS_GRF	MLTTS_GRF	VTTS_GRF
向前落地	男^a	不稳组	65.31±20.39	9.82±3.57	197.85±68.76	2.05±0.27	0.63±0.10	3.71±0.54
	男^a	正常组	50.45±12.20	8.72±2.83	177.75±40.48	1.67±0.35	0.55±0.14	3.20±0.48
	女^b	不稳组	43.11±11.88	6.97±2.44	137.52±32.87	1.67±0.29	0.52±0.12	2.88±0.40
	女^b	正常组	39.74±7.30	6.63±1.39	122.81±30.58	1.55±0.15	0.43±0.11	2.79±0.37
向侧落地	男^c	不稳组	14.68±4.29	56.26±18.35	183.60±54.35	0.80±0.16	1.75±0.42	3.41±0.54
	男^c	正常组	14.96±5.78	37.31±7.93	175.43±34.10	0.78±0.23	1.42±0.16	3.33±0.35
	女^d	不稳组	11.20±3.29	44.32±10.32	133.57±34.84	0.70±0.20	1.47±0.31	2.77±0.33
	女^d	正常组	9.24±2.61	27.98±5.24	125.45±27.75	0.54±0.11	1.23±0.26	2.64±0.48
向后落地	男^e	不稳组	46.54±12.21	10.87±2.46	160.90±35.78	1.46±0.46	0.64±0.20	3.06±0.76
	男^e	正常组	30.22±8.80	10.16±4.14	157.14±44.18	1.30±0.25	0.56±0.26	3.03±0.40
	女^f	不稳组	28.18±7.46	8.07±3.15	120.04±22.13	1.22±0.16	0.56±0.15	2.72±0.29
	女^f	正常组	23.62±4.14	6.59±1.64	108.66±20.55	1.27±0.19	0.51±0.12	2.56±0.26
	t值^a		-3.426	-1.326	-1.380	-4.593	-2.607	-3.856
	P值^a		< 0.001	0.190	0.173	< 0.001	0.012	< 0.001
	t值^b		-1.367	0.686	1.853	-1.996	3.167	0.939
	P值^b		0.176	0.495	0.069	0.050	0.002	0.351
	t值^c		-0.211	-5.194	-0.698	-0.475	-4.077	-0.672
	P值^c		0.834	< 0.001	0.488	0.636	< 0.001	0.504
	t值^d		2.672	-8.178	-1.050	4.250	-3.487	1.306
	P值^d		0.010	< 0.001	0.297	< 0.001	< 0.001	0.196
	t值^e		-6.017	-0.776	-0.354	-1.727	1.258	0.190
	P值^e		< 0.001	0.441	0.724	0.089	0.213	0.850
	t值^f		-3.069	2.400	2.165	-1.284	1.315	2.424
	P值^f		0.003	0.019	0.034	0.204	0.193	0.018

基于加速度信号的功能性踝关节不稳者动态姿势稳定性评价方法

Evaluation method of dynamic postural stability for functional ankle instability based on acceleration signals

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落地方向	GRF/N	传感器位置	加速度/(m·s^-2)	r值	P值
向前落地	1.79±1.13	腰点	1.25±0.55	0.114	0.042
		膝	1.73±0.61	-0.009	0.870
		踝	1.12±0.55	-0.164	0.003
向侧落地	1.73±1.04	腰点	1.29±0.58	0.368	< 0.001
		膝	1.81±0.68	-0.213	< 0.001
		踝	1.21±0.64	-0.315	< 0.001
向后落地	1.56±1.01	腰点	1.35±0.57	0.319	< 0.001
		膝	1.74±0.65	-0.220	< 0.001
		踝	1.14±0.53	-0.351	< 0.001

传感器位置	落地方向	指标	男		女
传感器位置	落地方向	指标	AUC	P值	AUC	P值
腰点	向前落地	APSI_ACC	-	-	0.717	0.004
		MLSI_ACC	0.667	0.048	0.663	0.030
		VSI_ACC	0.439	0.470	0.782	< 0.001
		APTTS_ACC	-	-	0.942	< 0.001
		MLTTS_ACC	-	-	0.733	0.002
		VTTS_ACC	-	-	0.566	0.359
	向侧落地	APSI_ACC	0.634	0.740	0.720	0.002
		MLSI_ACC	-	-	0.699	0.005
		APTTS_ACC	-	-	0.896	< 0.001
		MLTTS_ACC	-	-	0.752	< 0.001
		VTTS_ACC	-	-	0.822	< 0.001
	向后落地	APSI_ACC	-	-	0.749	< 0.001
		MLSI_ACC	-	-	0.773	< 0.001
		VSI_ACC	-	-	0.725	0.002
		APTTS_ACC	0.636	0.070	0.893	< 0.001
		MLTTS_ACC	-	-	0.763	< 0.001
		VTTS_ACC	-	-	0.525	0.729
膝	向前落地	APSI_ACC	0.575	0.375	0.739	0.001
		MLSI_ACC	-	-	0.670	0.024
		VSI_ACC	-	-	0.586	0.252
		MLTTS_ACC	-	-	0.556	0.460
	向侧落地	APSI_ACC	-	-	0.691	0.007
		MLSI_ACC	-	-	0.693	0.007
		VSI_ACC	-	-	0.671	0.017
		APTTS_ACC	-	-	0.844	< 0.001
		MLTTS_ACC	-	-	0.678	0.013
		VTTS_ACC	-	-	0.690	0.008
	向后落地	MLSI_ACC	-	-	0.701	0.005
		MLTTS_ACC	-	-	0.677	0.013
		VTTS_ACC	0.695	0.009	0.806	< 0.001
踝	向前落地	VTTS_ACC	-	-	0.702	0.005
	向侧落地	VSI_ACC	-	-	0.534	0.631
		APTTS_ACC	0.272	0.002	-	-
		MLTTS_ACC	-	-	0.722	0.002
		VTTS_ACC	-	-	0.073	0.483
	向后落地	MLTTS_ACC	-	-	0.360	0.050

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