Table 4.

Inter-reader reliability: maximal synovial thickness

Maximal synovial thickness	DIR			CE-MRI
(mm)	ICCa	95% CI	p value	ICCa	95% CI	p value
Per location (n = 104)
Suprapatellar recesses	0.91	0.84–0.96	< .001*	0.92	0.87–0.96	< .001*
Patellofemoral	0.81	0.69–0.90	< .001*	0.85	0.76–0.92	< .001*
Infrapatellar fat pad	0.85	0.75–0.92	< .001*	0.86	0.76–0.93	< .001*
Cruciate Ligaments	0.79	0.68–0.89	< .001*	0.81	0.69–0.90	< .001*
Medial posterior condyle	0.83	0.71–0.91	< .001*	0.80	0.67–0.89	< .001*
Lateral posterior condyle	0.92	0.86–0.96	< .001*	0.92	0.87–0.96	< .001*
Per child (n = 104)	0.87	0.78–0.93	< .001*	0.90	0.83–0.95	< .001*
Total measurements (n = 624)	0.87	0.84–0.90	< .001*	0.87	0.84–0.90	< .001*

Data are based on the aggregated measurements of 4 readers

DIR, double inversion recovery; CE, contrast-enhanced; ICC, intraclass correlation coefficient; CI, confidence interval

*p value < .05

^aBased on single-measurement, absolute-agreement, two-way random effects model