Table 2.

Intra-observer and interobserver reliabilities in continuous variables

Variable	Intra-observer				Interobserver
	ICC	Lower	Upper	p	ICC	Lower	Upper	p
TT-TG distance	0.959	0.919	0.979	< 0.001	0.944	0.891	0.972	< 0.001
TT-TG distance index	0.885	0.783	0.941	< 0.001	0.796	0.630	0.893	< 0.001
Trochlear depth	0.667	0.428	0.818	< 0.001	0.520	0.225	0.727	0.001
Lateral trochlear inclination	0.608	0.344	0.783	< 0.001	0.559	0.276	0.752	< 0.001
ISR	0.978	0.956	0.989	< 0.001	0.955	0.912	0.977	< 0.001
MISR	0.983	0.966	0.991	< 0.001	0.966	0.933	0.983	< 0.001
PTI	0.893	0.796	0.945	< 0.001	0.885	0.782	0.941	< 0.001
Patellar tilt angle	0.647	0.400	0.807	< 0.001	0.617	0.357	0.789	< 0.001
Bisect offset (%)	0.913	0.833	0.955	< 0.001	0.859	0.737	0.927	< 0.001

Abbreviations: TT, tibial tubercle; TG, trochlear groove; ISR, Insall-Salvati ratio; MISR, modified Insall-Salvati ratio; PTI, patellotrochlear index