Table 1. Reliability of measurement using Image J for reach distance and movement angles.

Outcome	FRT1	FRT2	ICC (1, 1) (95%CI)	ICC (1, 2) (95%CI)	95%CI of difference between two measurements	Fixed bias	Significance of correlation between difference of two measurements		Proportional bias	SEM	MDC95
							r	p
Reach distance (mm)	333.1 ± 51.0	336.3 ± 51.2	0.91 (0.83 to 0.95)	0.95 (0.91 to 0.97)	−10.37 to 4.07	(−)	−0.01	0.939	(−)	6.6	18.3
A-T angle (deg)	39.6 ± 7.2	40.2 ± 7.7	0.91 (0.84 to 0.95)	0.95 (0.91 to 0.98)	−1.66 to 0.36	(−)	−0.18	0.277	(−)	0.9	2.6
T-M angle (deg)	−3.3 ± 2.7	−3.4 ± 3.0	0.89 (0.80 to 0.94)	0.94 (0.89 to 0.97)	−0.27 to 0.61	(−)	−0.26	0.113	(−)	0.4	1.2
A-M angle (deg)	16.2 ± 2.3	16.5 ± 2.4	0.86 (0.75 to 0.93)	0.93 (0.86 to 0.96)	−0.70 to 0.10	(−)	−0.11	0.496	(−)	0.5	1.3
ASIS distance (mm)	−27.6 ± 32.3	−28.6 ± 34.9	0.84 (0.72 to 0.92)	0.92 (0.84 to 0.96)	−5.26 to 7.22	(−)	−0.14	0.386	(−)	7.6	21.1
TM distance (mm)	−41.0 ± 33.4	−42.9 ± 38.0	0.88 (0.78 to 0.93)	0.93 (0.87 to 0.97)	−4.00 to 7.80	(−)	−0.26	0.113	(−)	6.2	17.2

FRT1: First functional reach test; FRT2: Second functional reach test; ICC: intraclass correlation coefficient; CI: confidence interval; SEM: standard error of measurement; MDC: minimal detectable change; A-T angle: acromion-trochanter major angle; T-M angle: trochanter major-malleolus lateralis angle; A-M angle: acromion-malleolus lateralis angle; ASIS: Anterior Superior Iliac Spine; TM distance: Trochanter major distance

FRT1 and FRT2 were represented in average ± standard deviation.