do i need to include baseline variables in the cox ph ph model what is the propensity score when should i use the propensity score weighted what is the propensity score weight in coxph what data should include a prevalence score why do cox models use propensity score what is the difference between ph and propensity score what are covariates used for in a coxph what is cox propensity score weighting? how do i include propensity score when is propensity score weighted can we use prescriptive propensity to weight variables why use ph instead of propensity weights can propensity score be used in a cox model when to include baseline variables in coxph ph which variables are in the propensity score which covariates should be included in the coxph model what should be included in a coxph model which variables should be included in the coxph model how does the propensity score work