how to determine whether a sample has a propensity score how to calculate propensity scores how do you find odds for a sample of individuals to be matched how to determine propensity scores why do i need to determine odds of being matched for a sample how is propensity score used on the patient can you compare propensity scores to smoking how do you determine odds against smokers when to calculate propensity scores how do you calculate propensity to smoker can you compare propensity scores based on covariates what is the primary variable for propensity do you need covariates for propensity score do i need to know odds ratio between groups after combining two covariates can you calculate odds ratios on a covariate? how do you determine propensity score do you need to calculate odds on smoking is it appropriate to calculate odds based on covariates how do i calculate the odds ratio of a group that is matched with a tobacco smoker how do you calculate odds