Table 2. Transplantation and removal from the waiting list, comparing patients whose allocation priority is determined by exception points to those whose priority is determined from lab values.

Models are adjusted by UNOS score, as assigned by either lab MELD (non-exceptions) or exception score (exceptions), using indicator variables for each UNOS score other than 22, the most common value for exceptions. The models are restricted to a subset of UNOS scores as indicated; for example, the model for HCC exception compares exception person-time with eMELD between 22 and 25 to non-exception person-time with cMELD between 22 and 25.

A
90-day outcome	Odds ratio (exception MELD / calculated MELD)
90-day outcome	Removal or death	Transplantation
HCC exception, 22 ≤ UNOS score ≤ 25	_0.410.47_0.53	_1.531.65_1.79
Other exception, 15 ≤ UNOS score ≤ 25	_0.360.43_0.52	_1.201.33_1.47

B
1-year outcome	Odds ratio (exception MELD / calculated MELD)
1-year outcome	Removal or death	Transplantation
HCC exception, 22 ≤ UNOS score ≤ 25	_0.620.71_0.82	_2.142.38_2.65
Non-HCC exception, 15 ≤ UNOS score ≤ 25	_0.530.64_0.77	_1.681.91_2.19

C
3-year outcome	Odds ratio (exception MELD / calculated MELD)
3-year outcome	Removal from waiting list	Transplantation
HCC exception, 22 ≤ UNOS score ≤ 25	_0.550.63_0.73	_1.902.13_2.39
Non-HCC exception, 15 ≤ UNOS score ≤ 25	_0.470.58_0.71	_1.611.88_2.19