http://manuals.pqstat.pl/ 2026-05-07T18:20:48+00:00 http://manuals.pqstat.pl/ http://manuals.pqstat.pl/lib/tpl/dokuwiki/images/favicon.ico text/html 2022-02-16T09:51:00+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:survpl:kmporpl Comparison of survival curves The survival functions can be built separately for different subgroups, e.g. separately for women and men, and then compared. Such a comparison may concern two curves or more. The window with settings for the comparison of survival curves text/html 2022-02-16T10:11:45+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:survpl:phcoxpl Cox proportional hazard regression The window with settings for Cox regression is accessed via the menu Advanced statistics→Survival analysis→Cox PH regression Cox regression, also known as the Cox proportional hazard model (Cox D.R. (1972) text/html 2022-02-16T10:38:22+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:survpl:porpl Comparison of Cox PH regression models The window with settings for model comparison is accessed via the menu Advanced statistics→Survival analysis→Cox PH Regression -- comparing models Due to the possibility of simultaneous analysis of many independent variables in one Cox regression model, there is a problem of selection of an optimum model. When choosing independent variables one has to remember to put into the model variables strongly correlated with the survival time and weakly correla… text/html 2022-02-16T09:37:47+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:survpl:wsteppl Basics of survival analysis Life tables The window with settings for life tables is accessed via the menu Advanced statistics→Survival analysis→Life tables Life tables are created for time ranges with equal spans, provided by the researcher. The ranges can be defined by giving the step. For each range PQStat calculates: