Table 2.

Observed Exact and Quadratically Weighted Fleiss κ and Gwet AC Statistics for ACL Tear Pathology Classifications^a

	Observed Agreement		Chance-Corrected Agreement (95% CI)
Variable	Exact	Quadratically Weighted	Fleiss κ (Dichotomy)b	Gwet AC1 (Dichotomy)c
Reparability	0.825	—	0.522 (0.408-0.635)	0.725 (0.625-0.825)
Dichotomy
Tibial footprint remaining	0.854	—	0.291 (0.207-0.375)	0.816 (0.739-0.893)
Tibial stump length	0.789	—	0.367 (0.243-0.470)	0.687 (0.602-0.771)
Gross tibial stump vascularity	0.731	—	0.331 (0.233-0.429)	0.540 (0.436-0.662)
No. of fiber bundles	0.604	0.925	0.510 (0.403-0.617)	0.822 (0.767-0.877)
Ordinal
Tibial footprint remaining	0.637	0.920	0.428 (0.360-0.497)	0.851 (0.791-0.911)
Tibial stump length	0.470	0.876	0.155 (0.080-0.231)	0.672 (0.580-0.763)
Femoral stump length	0.558	0.701	0.090 (0.026-0.155)	0.458 (0.360-0.557)

^aAC, agreement coefficient; ACL, anterior cruciate ligament. Dashes indicate data cannot be calculated.

^bOr quadratically weighted κ (ordinal).

^cOr quadratically weighted AC2 (ordinal).