{"id":12847,"date":"2014-12-24T03:19:21","date_gmt":"2014-12-24T08:19:21","guid":{"rendered":"http:\/\/aea365.org\/blog\/?p=12847"},"modified":"2014-12-23T20:19:32","modified_gmt":"2014-12-24T01:19:32","slug":"josh-twomey-on-simple-and-effective-using-boxplots-to-display-individualized-results","status":"publish","type":"post","link":"https:\/\/aea365.org\/blog\/josh-twomey-on-simple-and-effective-using-boxplots-to-display-individualized-results\/","title":{"rendered":"Josh Twomey on Simple and Effective: Using Boxplots to Display Individualized Results"},"content":{"rendered":"<p>Hi! I\u2019m <strong>Josh Twomey<\/strong>, evaluation specialist at UMass Medical School\u2019s <a href=\"http:\/\/chpr.umassmed.edu\/\">Center for Health Policy and Research<\/a> (in the <a href=\"http:\/\/chpr.umassmed.edu\/our-programs\/office-clinical-affairs\">Office of Clinical Affairs<\/a>). As evaluators, we are often tasked with providing participants in our evaluations with individualized results. This can be challenging as results must be easy to interpret, display individual results in the context of the entire evaluation, and, where appropriate, show performance over time. My colleagues and I are concluding an evaluation of the Massachusetts Patient-Centered Medical Home Initiative focused on transforming traditional primary care into a more patient-centered care delivery model. Over the course of this evaluation, we faced the challenges above and found a basic, yet sometimes overlooked, solution to effectively communicate results to our participants.<\/p>\n<p>Boxplots (aka: box and whisker plots) have the advantage of displaying a lot of valuable information within a simple easy-to-understand graphic. A variable\u2019s mean, median, 25<sup>th<\/sup> percentile, 75<sup>th<\/sup> percentile, and highest\/lowest values can all be assessed at a glance. Extreme values (i.e., outliers) can be highlighted as well. The bottom of the \u2018box\u2019 represents the 25<sup>th<\/sup> percentile of all values in your data, whereas the top represents the 75<sup>th<\/sup>percentile. The median value is within the box and is displayed via a straight line. Extending from the top and bottom of the box are \u2018whiskers\u2019, representing the highest and lowest values of the distribution, respectively.<\/p>\n<p><strong>Hot Tip:<\/strong><\/p>\n<ul>\n<li>Boxplots are ideal when you must highlight a single participant\u2019s results among participants\u2019 results. Check out this example, where patient satisfaction from Dr. Smith\u2019s office is shown in the context of other individual primary care practices.<\/li>\n<\/ul>\n<p><a href=\"http:\/\/aea365.org\/blog\/wp-content\/uploads\/2014\/12\/Twomey.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12850\" src=\"http:\/\/aea365.org\/blog\/wp-content\/uploads\/2014\/12\/Twomey.png\" alt=\"Twomey\" width=\"512\" height=\"384\" srcset=\"https:\/\/aea365.org\/blog\/wp-content\/uploads\/2014\/12\/Twomey.png 512w, https:\/\/aea365.org\/blog\/wp-content\/uploads\/2014\/12\/Twomey-300x225.png 300w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/a><\/p>\n<p>Looking at the blue boxplot, notice that Dr. Smith\u2019s patient satisfaction score (i.e., 68) hovers just above the 25<sup>th<\/sup> percentile of all the offices\u2019 scores. Another advantage of boxplots is that data can easily be tracked over time. Here, Dr. Smith\u2019s score improves from about the 30<sup>th<\/sup> percentile at baseline to the near 100<sup>th<\/sup> percentile by the final measurement.<\/p>\n<p><strong>Hot Tip:<\/strong><\/p>\n<ul>\n<li>Interpreting a boxplot is easy, after you\u2019re shown how. When presenting boxplots, be sure to include some basic instructions on how to read one.<\/li>\n<\/ul>\n<p><strong>Cool Trick:<\/strong><\/p>\n<ul>\n<li>The end of the whiskers do not always have to represent the data\u2019s highest\/lowest points. Whiskers can be set to represent scores that are high\/low, but not outliers. Outliers can be displayed by dots falling above\/below the whiskers\u2019 ends.<\/li>\n<li>When constructing boxplots for numerous participants, macro variables can simplify production. Within your graphics generator, macro variables can simultaneously insert a single participant\u2019s data and other information (e.g., participant\u2019s name) into the boxplot. This technique allows you to generate graphs quickly and accurately, without manually entering data.<\/li>\n<\/ul>\n<p>In total, boxplots can be a quick, clear, and effective way of providing participants with the information they need.<\/p>\n<p><em>Do you have questions, concerns, kudos, or content to extend this aea365 contribution? Please add them in the comments section for this post on the<\/em><a href=\"http:\/\/aea365.org\/\"><em> aea365 webpage<\/em><\/a><em> so that we may enrich our community of practice. Would you like to submit an aea365 Tip? Please send a note of interest to <\/em><a href=\"mailto:aea365@eval.org\"><em>aea365@eval.org<\/em><\/a><em> . aea365 is sponsored by the<\/em><a href=\"http:\/\/eval.org\/\"><em> American Evaluation Association<\/em><\/a><em> and provides a Tip-a-Day by and for evaluators.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hi! I\u2019m Josh Twomey, evaluation specialist at UMass Medical School\u2019s Center for Health Policy and Research (in the Office of Clinical Affairs). As evaluators, we are often tasked with providing participants in our evaluations with individualized results. This can be challenging as results must be easy to interpret, display individual results in the context of [&hellip;]<\/p>\n","protected":false},"author":193,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[1335],"class_list":["post-12847","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-boxplot"],"_links":{"self":[{"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/posts\/12847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/users\/193"}],"replies":[{"embeddable":true,"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/comments?post=12847"}],"version-history":[{"count":3,"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/posts\/12847\/revisions"}],"predecessor-version":[{"id":12851,"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/posts\/12847\/revisions\/12851"}],"wp:attachment":[{"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/media?parent=12847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/categories?post=12847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aea365.org\/blog\/wp-json\/wp\/v2\/tags?post=12847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}