Predictions of resin-bonded bridge survivals, comparing two statistical models.
The purpose of this study was to compare the predictive accuracy of the standard Weibull distribution model with that of a modification, or mixture model, for resin-bonded etched-metal bridge survivals. A total of 189 bridges placed in adult patients treated by students and staff at a teaching hospital was evaluated over periods of up to 8 years. Survival predictions based on the actual survival data accumulated in 1989 were compared with the later survival data updated in 1992. Comparison of the two fitted Weibull predictive curves with the life table survival estimates from the 1992 updated data demonstrated clearly the improved accuracy of the mixture model for predicting survivals of the resin-bonded bridges in this study.
Smales
R J
RJ
Department of Dentistry, University of Adelaide, South Australia.
Berekally
T L
TL
Webster
D A
DA
D016379:Denture, Partial, Fixed, Resin-Bonded / Q000706:statistics & numerical data*; D005544:Forecasting; D006801:Humans; D015993:Life Tables; D016013:Likelihood Functions; D015233:Models, Statistical; D011475:Prosthesis Failure; D016019:Survival Analysis