Standardized Tip-Apex Distance (STAD): a modified individualized measurement of cephalic fixator position based on its own femoral head diameter in geriatric intertrochanteric fractures with internal fixation

Table 3 Reliability between two independent observers for measuring variables

Variable	ICC or κ	95% CI	Reliability
Singh index	0.682	0.573 to 0.767	Excellent
Cleveland zone	0.669	0.565 to 0.773	Excellent
fracture classification	0.788	0.709 to 0.847	Excellent
Reduction quality	0.809	0.709 to 0.909	Almost perfect
Parker ratio (AP)	0.917	0.884 to 0.942	Almost perfect
Parker ratio (Lat)	0.924	0.893 to 0.947	Almost perfect
Tip-apex distance (TAD)	0.905	0.866 to 0.933	Almost perfect
Standardized tip-apex distance (STAD)	0.906	0.743 to 0.955	Almost perfect

AP, anteroposterior view; LAT, lateral view; CI, confidence interval; ICC, intraclass correlation coefficient; κ, Kappa coefficient

ISSN: 1471-2474