A machine learning compatible method for ordinal propensity score stratification and matching

2020 ◽  
Author(s):  
Thomas J. Greene ◽  
Stacia M. DeSantis ◽  
Derek W. Brown ◽  
Anna V. Wilkinson ◽  
Michael D. Swartz
Keyword(s):  
Machine Learning ◽  
Propensity Score ◽  
Propensity Score Stratification

scholarly journals Perioperative Use of Dobutamine in Cardiac Surgery and Adverse Cardiac Outcome

2008 ◽  
Vol 108 (6) ◽  
pp. 979-987 ◽  
Author(s):  
Jean-Luc Fellahi ◽  
Jean-Jacques Parienti ◽  
Jean-Luc Hanouz ◽  
Benoît Plaud ◽  
Bruno Riou ◽  
...  
Keyword(s):  
Cardiac Surgery ◽  
Propensity Score ◽  
Clinical Judgment ◽  
Propensity Scores ◽  
Control Group ◽  
Cardiac Morbidity ◽  
Postoperative Myocardial Infarction ◽  
Channeling Bias ◽  
Cardiac Outcome ◽  
Propensity Score Stratification

Background Catecholamines, mainly dobutamine, are often administered without institutional guidelines or prespecified algorithms in cardiac surgery. The current study assessed the consequences on clinical outcome of catecholamines simply based on the clinical judgment of the anesthesiologists after cardiopulmonary bypass in adult cardiac surgery. Methods Consecutive patients were enrolled in a nonrandomized cohort study. Factors associated with perioperative use of catecholamines and with outcomes were recorded prospectively to conduct bias adjustment, including propensity scores. Major cardiac morbidity (i.e., ventricular arrhythmia, use of an intraaortic balloon pump and postoperative myocardial infarction) and all-cause intrahospital mortality were the primary and secondary endpoints, respectively. Results are expressed as odds ratio (OR) [95% confidence interval]. Results During the study, 84 of 657 patients (13%) received catecholamines, most often dobutamine (76 of 84, 90%). A higher incidence of both major cardiac morbidity (30 vs. 9%; P < 0.001; OR, 4.2 [2.5-7.3]) and all-cause intrahospital mortality (8 vs. 1%; P < 0.001; OR, 12.9 [3.7-45.2]) was observed in the catecholamine group compared with the control group. After adjusting for channeling bias and confounding factors, catecholamine administration remained significantly associated with major cardiac morbidity after propensity score stratification (OR, 2.1 [1.0-4.4]; P < 0.05), propensity score covariance analysis (OR, 2.3 [1.0-5.0]; P < 0.05), marginal structural models (OR, 1.8 [1.3-2.5]; P < 0.001), and propensity score matching (OR, 3.0 [1.2-7.3]; P < 0.02), but not with all-cause intrahospital mortality. Conclusions These results suggest that dobutamine should only be administered when the benefit is judged to outweigh the risks.

scholarly journals The Association between the Availability of Sugar-Sweetened Beverage in School Vending Machines and Its Consumption among Adolescents in California: A Propensity Score Matching Approach

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Lu Shi
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
California Health Interview Survey ◽  
Cross Sectional ◽  
Sugar Sweetened Beverage ◽  
Sweetened Beverage ◽  
Vending Machines ◽  
Adolescent Sample ◽  
Interview Survey ◽  
Propensity Score Stratification

There is controversy over to what degree banning sugar-sweetened beverage (SSB) sales at schools could decrease the SSB intake. This paper uses the adolescent sample of 2005 California Health Interview Survey to estimate the association between the availability of SSB from school vending machines and the amount of SSB consumption. Propensity score stratification and kernel-based propensity score matching are used to address the selection bias issue in cross-sectional data. Propensity score stratification shows that adolescents who had access to SSB through their school vending machines consumed 0.170 more drinks of SSB than those who did not (). Kernel-based propensity score matching shows the SSB consumption difference to be 0.158 on the prior day (). This paper strengthens the evidence for the association between SSB availability via school vending machines and the actual SSB consumption, while future studies are needed to explore changes in other beverages after SSB becomes less available.

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