I believe there is a shared vision in the healthcare community that improved and ubiquitous health metrics will make a significant contribution to the President’s goals to improve the quality of healthcare and reduce its cost in America. The data visualization community, popularized by the work of Edward Tufte, Hans Rosling, David McCandless, and others, would advocate the intensive use of visualization technologies to enhance and improve the presentation of health metrics. There are powerful new tools becoming available through ordinary web browsers that will enable substantially improved visualization of health metrics data. Indeed, the recent PCAST Health Information Technology report [.pdf] suggests that:
“Internet based technologies create a platform for “disruptive innovation,” meaning innovations that upset the status quo and can broadly expand markets [...] These types of technologies might allow the 80 percent of physicians who are nondigital [...] [transition] into more modern technologies”
These new health metrics data visualization tools will significantly contribute to the disruptive innovation that the PCAST authors suggest may “help U.S. industry leapfrog to the front of the pack internationally in health IT.”
Traditional health metrics data is typically provided to users as static, absolute information which, in a connected world like healthcare, doesn’t give the complete picture. Relative figures connected to other relevant data enable us to see a fuller picture and perhaps gain unique insights. Connected healthcare data sets presented as insightful visualizations are capable of altering perspectives and changing views. Swedish medical doctor, academic, statistician and public speaker Hans Rosling says “Let the data set change your mindset.” Let’s see how these concepts might be applied to a major issue in the healthcare community: patient compliance.
The Problem of Patient Compliance
Patient compliance, the process of complying with a regimen of treatment, is a universal problem in the healthcare industry. The American Heritage® Stedman’s Medical Dictionary provides a rigorous definition: “The degree of constancy and accuracy with which a patient follows a prescribed regimen, as distinguished from adherence or maintenance.” The importance of patient compliance, and the opportunity for improved healthcare quality, was demonstrated in an often-cited 2004 paper [.pdf] that stated:
“About half of all patients with chronic diseases stop refilling prescriptions by one year. Several effective interventions are available and adaptations of clinical trials practices offer promise for further improvement. Poor adherence is a remedial problem in health care quality and its improvement and accountability offer shared opportunities for providers and patients.”
The patient compliance issue will take on new prominence as recent healthcare legislation is implemented. The incentives changed by healthcare reform will require economic participants in the healthcare market to transition from placing primary emphasis on reducing costs as a method of enhancing bottom lines to one where physicians, pharmacists, and hospitals will make money by putting emphasis on healthier people and improved patient health outcomes. Also, the legislation provides for a patient-centered medical home program that will integrate patients as active participants of their own health management with their primary caregiver serving as the point person in the medical home program. A goal of this movement is to improve patient health in a cost-effective manner. Patient compliance will be one available path for cost improvements. Better visualization could be an effective tool to improve compliance.
Visualizing the CRP Test
The potential ability of health metrics data visualization to enable improved patient compliance is demonstrated by a recent prize-winning visualization of the humble and routine CRP (c-reactive protein) laboratory test. The Wired Magazine article, “The Blood Test Gets a Makeover,” shows the original traditional computer output CRP report and the suggested visualization of the data by the independent data journalist and information designer David McCandless.
Although the McCandless visualization was harshly and justifiably criticized on medical grounds by a number of commentators on the Wired article, as well as commentators on his own site, it is clear to me that the visualized CRP report is more likely to result in increased patient compliance. Mr. McCandless defends his visualization by reminding his critics that his work was done without any input from the medical community while his most strident critics remind the visualizer that the CRP test is intended for physicians to understand and interpret for the patient considering his or her complete health profile.
Both the visualization author and his critics have valid points. Nonetheless, the dramatic visual contrast of the reports demonstrates the potential for visualization to improve medical professionals’ communication with patients and caregivers. A real world implementation of enhanced visualization of medical test results would be thoroughly vetted by qualified medical personnel for technical content and desired outcomes.
I thought the most provocative and insightful reader comment regarding the blood test report visualization was by commenter Nick on the McCandless website who said:
“This is amazing. I’ll go you one better tho (sic), base it on a living document that will track changes over time, so you can have health history interactivity. That would be swell.”
I agree, Nick, that would be swell! And useful too. Let’s meet the man that says we can have exactly the living document that Nick wants–some now, some soon.
New and Improved Tools
Let me introduce a new data visualizer, a young Frenchman, Paul Rouget, an engineer at the Mozilla Foundation, maker of the Firefox web browser, who says:
“Most of the infographics we see are beautiful, but sooooo (sic) static. You can make them much more alive if you use the new web technologies.”
Paul adds, “It’s a great time to be a data visualizer. After a long period of hibernation, the standards bodies and browser vendors have been extremely busy over the past few years, generating a torrent of exciting technology.” He has written a blog post, Why you should build your infographics in HTML5 and CSS3, providing an overview of a few of these emerging technologies that will bring life to data visualizations.
Lay readers may have the impression that HTML5 and CSS3 are two distinct bodies of browser-based technologies for the presentation of information on the web. In fact, HTML5 is a collection of many separate technical modules, including CSS3. As Mr. Rouget explains:
“the persistent use of blanket terms, especially HTML5, as a sort of brand shorthand for “emerging web technology” is a useful shortcut. It allows nontechnical people to grasp—in a generalized way—the exciting work being done in the standards space right now.”
Those who are interested in the full, detailed description of these new technologies should look at Rob Larsen’s blog post primer HTML5, CSS3, and related technologies: A rapid-fire guide to new and emerging web standards.
Features and Examples
Paul Rouget presents a list of some of the new features of these technologies that are now beginning to enhance every web user’s experience.
Interactive content: You can change the style/content of an element if the user interacts with it: :hover effects, fold/unfold on click, buttons to decide what to draw and select options (select a country, choose how to sort, etc.
Live data: With an image, you’re just showing a “snapshot” of your data at a certain time. The web allows you to fetch data. Your infographic could look completely different depending on when it is viewed. Build your graph with SVG or Canvas.
Make it move!: With SVG, SMIL, CSS Transitions, Canvas (see ProcessingJS), CSS Animations, you can build beautiful animations.
Make it sexy: Well, it’s obvious, your infographic must be beautiful. With CSS3, you have infinite ways to make things beautiful: gradients, font-faces, multiple background, transforms, SVG background, …
Side effects: Your infographic will be accessible (copy/paste!) People will be able to enhance it (view source! Host it on github.) You can have multiple layouts, like a mobile layout (mediaQueries).
Well, Nick, it seems that with these new technologies you could soon have exactly the “living document that will track changes over time, so you can have health history interactivity” that you were asking for. Moreover, since these new technologies will be delivered through the web browser, they will be available throughout the entire range of devices that support web browsers, including mobile, tablet, notebook, laptop, desktop, and many other form factors as they exist today and as new ones evolve.
Not only patients and caregivers will benefit from the new visualization technologies, but all data users in the healthcare field thanks to an improved and enhanced presentation of health metrics data through continuing progress in visualization, analytics and data science. The opportunities for practitioners’ clinical decision support and hospital operations should equal or exceed the benefits to patients and caregivers. The combined advantages to the entire healthcare community will significantly contribute to the goals to improve the quality of healthcare and reduce its cost in America.
New tools for data visualization – that’s Progress!
Opportunities for Reader Action
Visualization Resources
Infographics Collections on the Web