Table 2.

Results from the linear mixed effects model (study 2)

Component	Factor level	Estimate	95 % CI	P-value
Observer	1st (reference)
	2nd	−10.03	−351.91 to 331.85	0.95
	3rd	28.39	−313.49 to 370.27	0.87
Time point	Baseline (reference)
	Post operation	−490.51	−859.78 to −121.24	0.009
	1. follow-up	185.90	−210.54 to 582.33	0.36
	2. follow-up	−89.89	−692.92 to 513.13	0.77
	3. follow-up	−389.29	−937.38 to 158.80	0.16
Constant		2675.03	2046.19 to 3303.86	<0.0001
Patient variance		345668.5	127739.2 to 935395.8
Scanner variance		97156.9	2976.2 to 3171673
Residual variance		745438.9	582229.8 to 954398.3