{"id":2568,"date":"2018-06-04T17:23:49","date_gmt":"2018-06-04T11:23:49","guid":{"rendered":"https:\/\/www.isrt.ac.bd\/?post_type=tribe_events&p=2568"},"modified":"2018-06-04T17:23:49","modified_gmt":"2018-06-04T11:23:49","slug":"seminar-on-wednesday-june-6-2018-at-1030-am","status":"publish","type":"tribe_events","link":"https:\/\/isrt.ac.bd\/event\/seminar-on-wednesday-june-6-2018-at-1030-am\/","title":{"rendered":"Seminar on Wednesday, June 6, 2018 at 10:30 am"},"content":{"rendered":"
Title of the Talk<\/b>:\u00a0Can We Train Machine Learning Methods to Outperform the High-dimensional Propensity Score Algorithm?<\/div>\n
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Speaker:<\/b>\u00a0Dr. M. Ehsan Karim<\/div>\n
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\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Assistant Professor, SPPH, UBC<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Scientist & Biostatistician, CHEOS, Canada<\/div>\n
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Venue:<\/b>\u00a0ISRT Seminar room<\/div>\n
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—————————————Abstract-<\/b>——————————————————————-<\/div>\n
The use of retrospective health care claims datasets is frequently criticized for the lack of complete information on potential confounders. Utilizing patient\u2019s health status\u2013related information from claims datasets as surrogates or proxies for mismeasured and unobserved confounders, the high-dimensional propensity score algorithm enables us to reduce bias. Using a previously published cohort study of postmyocardial infarction statin use (1998\u20132012), we compare the performance of the algorithm with a number of popular machine learning approaches for confounder selection in high-dimensional covariate spaces: random forest, least absolute shrinkage and selection operator, and elastic net. Our results suggest that, when the data analysis is done with epidemiologic principles in mind, machine learning methods perform as well as the high-dimensional propensity score algorithm. Using a plasmode framework that mimicked the empirical data, we also showed that a hybrid of machine learning and high-dimensional propensity score algorithms generally perform slightly better than both in terms of mean squared error, when a bias-based analysis is used. This talk is based on a joint work with Menglan Pang and Robert W Platt from McGill Deltin 7 Aviator গেম টাকা ইনকাম [Epidemiology: 2018,29(2):191\u2013198].<\/div>\n
———————————————————————————————————————–<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Title of the Talk:\u00a0Can We Train Machine Learning Methods to Outperform the High-dimensional Propensity Score Algorithm? Speaker:\u00a0Dr. M. Ehsan Karim \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Assistant Professor, SPPH, … [ Read More ]<\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"template":"","meta":{"_acf_changed":false,"nf_dc_page":"","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[15],"class_list":["post-2568","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-seminar","cat_seminar"],"acf":[],"yoast_head":"\nSeminar on Wednesday, June 6, 2018 at 10:30 am - Institute of Statistical Research and Training<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/isrt.ac.bd\/event\/seminar-on-wednesday-june-6-2018-at-1030-am\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Seminar on Wednesday, June 6, 2018 at 10:30 am - Institute of Statistical Research and Training\" \/>\n<meta property=\"og:description\" content=\"Title of the Talk:\u00a0Can We Train Machine Learning Methods to Outperform the High-dimensional Propensity Score Algorithm? 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