Test-retest reliability of an insole plantar pressure system to assess gait along linear and curved trajectories

Table 2 Summary of reliability results of each ‘whole-foot’ for the three walking trajectories and for the four output variables

	Left				Right
	ICC	CI 95%	% Err	MDC₉₅	ICC	CI 95%	% Err	MDC₉₅
Linear trajectory
Peak Force	0.96	(0.94-0.97)	4.16	82.71 (N)	0.96	(0.93-0.97)	4.28	85.39 (N)
Peak Pressure	0.95	(0.93-0.97)	6.73	4.23 (kPa)	0.95	(0.93-0.97)	3.81	3.11 (kPa)
Contact Area	0.96	(0.94-0.98)	4.92	9.38 (cm²)	0.96	(0.94-0.98)	4.64	10.38 (cm²)
Stance	0.81	(0.62-0.89)	4.62	0.05 (s)	0.87	(0.80-0.92)	3.41	0.04 (s)
Clockwise trajectory
Peak Force	0.97	(0.95-0.99)	4.47	67.84 (N)	0.97	(0.95-0.98)	3.60	68.87 (N)
Peak Pressure	0.97	(0.93-0.98)	8.75	3.00 (kPa)	0.95	(0.91-0.97)	6.78	4.3 (kPa)
Contact Area	0.99	(0.98-1.00)	3.76	5.07 (cm²)	0.99	(0.98-1.00)	2.95	5.63 (cm²)
Stance	0.93	(0.89-0.95)	4.43	0.05 (s)	0.92	(0.87-0.95)	3.47	0.06 (s)
Counterclockwise trajectory
Peak Force	0.97	(0.95-0.99)	4.65	66.56 (N)	0.97	(0.96-0.98)	4.33	66.21 (N)
Peak Pressure	0.96	(0.93-0.98)	5.59	3.37 (kPa)	0.94	(0.87-0.97)	10.14	3.2 (kPa)
Contact Area	0.99	(0.97-0.99)	3.95	5.23 (cm²)	0.99	(0.97-1.00)	3.50	5.29 (cm²)
Stance	0.93	(0.88-0.96)	4.46	0.05 (s)	0.91	(0.85-0.94)	4.86	0.05 (s)

ICC, intraclass correlation coefficient; CI 95%, 95% Confidence Interval of ICC; % Err, percentage mean error between values of the first and the second day of acquisition; MDC₉₅, minimum detectable change at the 95% confidence level.

ISSN: 1743-0003