http://manuals.pqstat.pl/ 2026-05-17T00:59:33+00:00 http://manuals.pqstat.pl/ http://manuals.pqstat.pl/lib/tpl/dokuwiki/images/favicon.ico text/html 2022-02-16T10:15:16+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:survpl:phcoxpl:hrpl Hazard Ratio An individual hazard ratio (HR) is now calculated for each independent variable : It expresses the change of the risk of a failure event when the independent variable grows by 1 unit. The result is adjusted to the remaining independent variables in the model text/html 2022-02-16T10:32:11+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:survpl:phcoxpl:resztpl Analysis of model residuals The analysis of the of the model residuals allows the verification of its assumptions. The main goal of the analysis in Cox regression is the localization of outliers and the study of hazard proportionality. Typically, in regression models residuals are calculated as the differences of the observed and predicted values of the dependent variable. However, in the case of censored values such a method of determining the residuals is not appropriate. In the program we ca… text/html 2022-02-16T10:35:25+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:survpl:phcoxpl:werpl Model verification * Statistical significance of particular variables in the model (significance of the odds ratio) On the basis of the coefficient and its error of estimation we can infer if the independent variable for which the coefficient was estimated has a significant effect on the dependent variable. For that purpose we use