Kinematics and temporospatial parameters during gait from inertial motion capture in adults with and without HIV: a validity and reliability study

Table 5 Gait parameter differences between people with and without HIV as measured by the respective systems

Parameter	Mean difference	95% CI	p-value	Mean difference	95% CI	p-value
Parameter	IMU			OMC
Spatial parameters
Step length (cm)	2.29	− 2.92; 7.50	0.36	2.60	− 1.9; 7.1	0.24
Normalized step length	0.05	− 0.03; 0.13	0.19	0.10	0.0; 0.1	0.09
Stride length (cm)	5.31	− 5.11; 15.73	0.29	5.62	− 3.52; 14.76	0.21
Normalized stride length	0.11	− 0.04; 0.26	0.15	0.11	− 0.01; 0.24	0.08
Temporal parameters
Cadence (steps/min)	7.71	− 2.11; 17.54	0.11	7.34	− 2.41; 17.09	0.13
Stance time (s)	− 0.06	− 0.11; 0.00	0.04*	− 0.06	− 0.11; 0.00	0.04*
Step time (s)	− 0.04	− 0.09; 0.01	0.12	− 0.04	− 0.09; 0.01	0.11
Single support time (s)	− 0.02	− 0.06; 0.03	0.41	− 0.02	− 0.06; 0.02	0.37
Double support time (s)	− 0.04	− 0.07; − 0.01	0.01*	− 0.04	− 0.06; − 0.02	< 0.01*
Temporophasic parameters
Stance time (%GC)	− 1.41	− 2.90; 0.09	0.06	− 1.29	− 2.13; − 0.45	0.01*
Single support time (%GC)	0.99	− 0.65; 2.62	0.22	1.06	0.20; 1.92	0.02*
Double support time (%GC)	− 2.39	− 5.34; 0.56	0.10	− 2.35	− 3.97; − 0.73	0.01*
Temporospatial parameters
Gait speed (m/s)	0.12	− 0.02; 0.26	0.09	0.13	0.00; 0.27	0.06
Normalized gait speed	0.05	0.00; 0.10	0.06	0.05	0.00; 0.10	0.03*

Asterisks indicate statistically significant differences between participant groups
%GC percentage of gait cycle, IMU inertial measurement units, OMC optical motion capture

ISSN: 1475-925X