The data were statistically analyzed using
SPSS v.22 for Mac (SPSS Inc., Chicago, IL, USA) and STATA v.17 for Mac (Stata Corp., College Station, TX, USA) with a significance level of p-value <0.05. Descriptive statistics were used to describe the data distribution. Fisher's exact test was used to compare the data distribution between the resin composite and crown groups. The survival rate against fracture of the anterior ETT with resin composite and crown restorations were compared using Kaplan-Meier survival analysis and the Tarone-Ware test.
When analysing the possible prognostic factors, the hazard ratios were non-proportional. Hence, a multivariable, non-proportional hazard model was used in a full model and a predictive model to explain and predict any prognostic factors with a p-value of <0.05 in the Tarone-Ware test.
For the subgroup analysis in the resin composite group and the crown group, the Kaplan-Meier survival analysis and the Tarone-Ware test were used to analyze the survival rates and possible prognostic factors.
Intaraprasong N., Banomyong D., Chotvorrarak K., Ngoenwiwatkul Y, & Pittayachawan P. (2023). Influence of Different Post-endodontic Restorations on the Survival Rate Against Fracture of Endodontically Treated Anterior Teeth Affected by Cervical Lesions with Pulpal Involvement: A Retrospective Clinical Study. European Endodontic Journal, 9(1), 44-56.