Abstract Background Propensity scores are widely used to deal with confounding bias in medical research. An incorrectly specified propensity score model may lead to residual confounding bias; therefore it is essential to use diagnostics to assess propensity scores in a propensity score analysis. The current use of propensity score diagnostics in the medical literature is unknown. https://www.chiggate.com/nicabate-clear-patch-stop-smoking-transdermal-drug-delivery-system-nicotine-21mg-7-pack-online/