TABLE V.

Tier as Predicted by Different Models Using Change in ASES Score Beyond 2-Year-Range Follow-up

	Class*
	A	B	C
Model 1 predicted tier
Probability
p(A)	0.94	0.04	0.04
p(B)	0.05	0.95	0.03
p(C)	0.02	0.01	0.94
Sensitivity	0.91	0.94	0.98
Model 2 predicted tier
Probability
p(A)	0.93	0.16	0.14
p(B)	0.06	0.80	0.13
p(C)	0.01	0.03	0.73
Sensitivity	0.57	0.81	0.96
Model 3 predicted tier
Probability
p(A)	0.77	0.17	0.06
p(B)	0.18	0.72	0.10
p(C)	0.13	0.16	0.71
Sensitivity	0.6	0.72	0.86

^*Classes are separated by pre- to postoperative improvement in ASES total score, where Class A represents an improvement of ≤28 points, Class B represents an improvement of 29 to 55 points, and Class C represents an improvement of >55 points.