OBJECTIVE The objective of this study was to determine whether professional maintenance appointments were related to a decrease on dental implant loss. METHODS We performed a retrospective review (1995-2012) of 1020 patient dental charts to collect data including a cadre of different variables such as age, gender, race, diabetes, osteoporosis, jaw location, implant dimensions and professional...

BACKGROUND Oral cancer leads to a considerable use of health care resources. Wide resection of the tumor and reconstruction with a pedicle flap/ free flap is widely used. This study was conducted to investigate if young age at the time of diagnosis of oral cancer requiring this treatment confers a worse prognosis. METHODS A total of 2339 patients who underwent resections for oral cancer from ...

Methods We evaluated by logistic regression and Cox proportional model analysis factors associated to treatment modification during the first year of HAART in antiretroviral naïve patients from a single HIV unit in Madrid. Variables included in the analysis were: Basic sociodemographic characteristics, data on the clinical course, VHC coinfection, antiretroviral therapy and immunologic and viro...

Number of words: 2795 (excluding summary, references and tables) 2 SUMMARY This paper discusses techniques to generate survival times for simulation studies regarding Cox proportional hazards models. In linear regression models, the response variable is directly connected with the considered covariates, the regression coefficients and the simulated random errors. Thus, the response variable can...

OBJECTIVES The goal of this report is to present an individual patient's survival estimation curve using the each institution's survival data after Cox proportional hazard analysis. METHODS The program was developed in three parts: input of basic data from Cox proportional hazard analysis, input of individual patient's covariates, and presentation of individual patient's survival curve. In th...