Accessible Health Information Technology (IT) for Populations with Limited Literacy:

A Guide for Developers and Purchasers of Health IT

Prepared for:

National Resource Center for Health IT
Agency for Healthcare Research and Quality

U.S.
Department of Health and Human Services
540 Gaither Road

Rockville
, MD 20850
www.ahrq.gov

Prepared by:
June Eichner and Prashila Dullabh

NORC at the
University of Chicago

AHRQ Publication No. 08-0010-EF

October 2007

Suggested Citation:

Eichner J, Dullabh P. Accessible Health Information Technology (Health IT) for Populations With Limited Literacy: A Guide for Developers and Purchasers of Health IT. (Prepared by the National Opinion Research Center for the National Resource Center for Health IT). AHRQ Publication No. 08-0010-EF. Rockville, MD: Agency for Healthcare Research and Quality. October 2007.

The authors of this report are responsible for its content. Statements in the report should not be construed as endorsement by the Agency for Healthcare Research and Quality or the U.S. Department of Health and Human Services.

Preface

This guide and checklist are intended for developers and purchasers of health information (IT) that is designed to be accessed and used by consumers. As most health IT developers have little knowledge of populations with limited literacy and of the technical standards and aspects of accessible health IT design, this guide and checklist provide a structure, strategies, and other resources for the development of these technologies. Similarly, purchasers of health IT (e.g., heath plans, pharmaceutical companies, foundations, and other non-profit organizations) that desire to make technologies available to limited-literacy adults, can use this guide and checklist to evaluate a health IT product. For those purchasers who contract out the development of their product, this guide can be used to direct and validate the developer’s work.

Our process for developing this guide and checklist included a review of the IT and health IT literature; examination of products’ and organizations’ Web sites; and discussions with developers and purchasers of health IT as well as researchers involved in the evaluation of health IT for limited-literacy populations. The term “health IT” is used throughout this guide to refer to hardware and software as well as devices, applications, and interfaces. Although we sought out well-documented, evidence-based guidelines, we found that the development of accessibility standards for many of these technologies is still in the early stages and that additional and larger scale research is needed. Thus, we have compiled a checklist based on what is known at this point in time and hope that this checklist will be updated as additional evidence becomes available

Contents

Section I. Introduction to this Guide and Checklist

Section II. Overview of Health IT for Limited-Literacy Populations

Section III. Principles of Accessible and Usable Health IT

Universal Design

Guidelines for all Health IT

Plain and Clear Language Is Used

Content Is Relevant to Audience

Format Is Conducive to Reading and Comprehension

Content Appeals to Diverse Racial and Ethnic Groups

Content Has Undergone Iterative Testing and Revision

Guidelines for Specific Health IT

Internet Web sites

Computer Kiosks

Mobile Phone, BlackBerry, and Personal Digital Assistant (PDA)

Home Monitoring Devices

Appendix

Section I. Introduction to this Guide and Checklist

Health information technology (IT) has become an important vehicle for providing health information to consumers and is increasingly being used by consumers for other functions, including self-care, informed and shared decisionmaking, connecting with health care providers, communicating with others with similar health issues, and storing and accessing personal health records. Of concern, however, is that the literacy level required to effectively use most health IT is much higher than that of a large share of the U.S. population, and its content and format pose considerable barriers as well. There are multiple dimensions of literacy. General literacy is defined as the ability to utilize reading, writing and computational skills to function in society. Health literacy is the ability to obtain, process, understand, and act on health information. eHealth literacy is the ability to seek, find, understand, and appraise health information from electronic sources and apply this knowledge to addressing or solving a health problem. To ensure that those with limited literacy benefit from these technologies, health IT must be designed to be accessible to these populations.

Numerous reasons may explain why so little attention has been paid to making health IT available to limited-literacy populations. These reasons include the perception that limited-literacy populations lack access to health IT and would not know how to use these devices and applications; that the number of adults with limited literacy is small and insignificant; and that there are few financial incentives to encourage the development or purchase of such IT. Often overlooked, however, are the benefits to developers and purchasers for their design of accessible health IT for limited-literacy populations. These benefits include:

These 92 million persons provide considerable opportunity to expand the audience of health IT products.

With the health care environment’s increasing emphasis on engaging consumers in their care, the market for consumer health IT has been expanding. To support this new paradigm, health plans are providing consumers with information and tools to enhance their decisionmaking ability. Similarly, State and Federal Governments are promoting the development of health IT, including a focus on personal health records and other systems that interface with consumers. As health plans and governments strive to engage consumers in their own care, accessible information and tools to support and empower consumersincluding those with limited-literacywill be crucial.

When properly designed, health IT is used by limited-literacy populations. The table below highlights three health IT products that have been well-received and utilized by adults with limited literacy.

Examples of health IT that have been well-utilized by both limited- and higher literacy populations

MiVIA

An Internet-accessible personal health record (PHR) in Spanish for migrant and seasonal farm workers, MiVIA’s goal is to improve users’ health outcomes, continuity of care, and health literacy. MiVIA also allows for access to email and a member portal that provides community resource information in accessible language and format. It also includes a provider portal that allows providers access to workers’ health information. MiVIA is now used by 5,200 farm workers.

Health Hero

A “technology in a box” home health device that plugs into a phone line, Health Hero prompts the user with easy-to-read health questions, collects data, then transmits the data to a provider. It is the predominant home health device used by the Veteran’s Administration (VA), with over 80 percent of patients in the VA’s home health program utilizing it.

CHESS (Comprehensive Health Enhancement Support System) breast cancer module

An information and support Web site for women with breast cancer, CHESS provides information services (a compilation of frequently asked questions and answers, articles on breast cancer, a resource guide and directory of organizations and services), support services (discussion groups, ask an expert, and personal stories), and decision services (assessment tools, health charts, and decision aids).

It is hoped that this guide will facilitate the development of health IT accessible to limited- literacy populations and that it will be used by purchasers of health IT as a product evaluation guide. The rest of this guide is organized as follows:

Section II. Overview of Health IT for Limited-Literacy Populations

Health IT offers limited-literacy (as well as higher literacy) populations numerous advantages:

Below is an overview of the predominant health IT for use by consumers, with examples of what they typically offer and how they are used.

Predominant health IT for use by consumers

Internet Web sites

Along with making health information available on almost any subject, Web sites offer interactive health tracking tools, message boards and chat rooms, and host interfaces such as Web portals, personal health records, and secure patient-provider messaging.

Touchscreen kiosks

Commonplace in shopping malls, grocery stores, and banks, kiosks provide educational sessions aimed at improving self-care for a specific health condition.

Personal wireless devices

(cell phone, BlackBerrry, and PDA)

Small, portable, and private, these devices have the ability to send and receive text messages and email, host games, and interface with the Internet.

Home monitoring devices

For use by patients and/or home care providers, these devices are tied to an information system and give actionable information to patients and/or providers.

Health IT usage by those with limited literacy remains well below that of higher literacy populations. Although the availability and use of computer and other health IT has increased among limited-literacy populations, a digital divide remains. Developers and purchasers of health IT can help to reduce this divide by ensuring that the reading level, content, and format of these technologies are accessible to limited-literacy populations.

Section III. Principles of Accessible and Usable Health IT

To best serve users of health IT, information must be both accessible and usable. This guide uses the term “accessibility” to refer to how well users can use a product to achieve their goals and how satisfied they are with that process (some call this “usability.”) Many of the issues raised by the term “accessibility” are addressed by the universal design approach. This section describes the importance of universal design, overall guidelines for accessible health IT, and guidelines for specific health IT (Internet Web sites; computer kiosks; mobile phones, BlackBerrys, and Personal Digital Assistants; and home monitoring devices).

Universal Design

Universal design endorses the design of products, services, and environments so they are usable by as many people as possible, regardless of age, ability, or circumstance. The Center for Universal Design. http://www.design.ncsu.edu/cud/about_ud/about_ud.htm. Accessed September 30, 2007. It suggests that all technologies meant for use by the general public should also be accessible to limited-literacy populations.

Below are the basic universal design principles. Although most developers will be familiar with this terminology, purchasers of health IT who are not should ask developers whether these properties are incorporated into their design.

Basic universal design principles are:

Health IT incorporates many elements that support universal design, although attention is required to ensure that they are used to enhance usability for limited-literacy populations. IT (and non-IT) guidelines and evaluation tools often do not address literacy, and care must be paid to ensure that literacy is directly and sufficiently addressed.

Guidelines for all Health IT

A number of general guidelines are applicable to the different types of health IT. Many of these guidelines are adapted from low-literacy guidelines for print materials (e.g., pamphlets). Although print guidelines have been around for many years, they retain their relevance and serve as the foundation for accessible health IT.

The major principles for ensuring accessible health IT for those with limited literacy include the use of the following:

The following sections discuss the rationale for each of these principles, checklist items to comply with these principles, and elaborate on those items that would benefit from examples or further explanation.

Plain and Clear Language Is Used

Adults with limited-literacy comprehend best when plain and clear language is used. Plain and clear language presents information in a way that makes it as easy as possible for people to understand. The goal is that users will understand a document the first time they read it.

Some attributes of plain and clear language are as follows:

As per the last bullet, it is crucial that the reading level not be higher than the 6th grade. Studies show that the reading level for most IT materials is far beyond the reading level of limited-literacy populations, and that most health education material is written at a 10th grade or higher level. Although it may be difficult to write or rewrite materials below the 6th grade level, over one-fifth of adults are unable to read above the fifth grade level. Get Caught Reading. http://www.getcaughtreading.org/literacyfacts.htm. Accessed September 30, 2007. In addition, the reading level does not provide a complete picture of whether a user will be able to comprehend and use a document.

A number of tools are available to assess reading level (e.g., Flesh-Kincaid and SMOG (Simplified Measure of Gobblegook)). Reading level is usually computed “by hand,” although some of these tools are available as a computer application, such as those included in Microsoft® Word. All documents that are to be tested should be “prepared” before the assessment. This entails removing periods from abbreviations, colons, and semi-colons, because if not removed, they are counted as the end of a "sentence" and will result in an underestimation of the grade level. (See Section IV, Additional Resources, for further information.)

Content Is Relevant to Audience

Along with being able to use and comprehend a health IT, its content must be relevant to prospective users. Users must have a need and desire for the information, and it must assist them in meeting their health care needs. The content must also be framed appropriately. For example, information pitched at those who are already familiar with the subject matter or bombarding users with too much information at one time may cause users to exit the health IT application and not return. Such users may also be discouraged from using other health IT applications.

The following items are important for the development of content relevant to a limited-literacy audience:

Format Is Conducive to Reading and Comprehension

The format of the document influences a person’s ability to read and comprehend it. Adults with limited-literacy may be particularly disadvantaged by a difficult-to-read format. The format of health IT is especially important because many IT features, such as scrolling, moving objects, animation, and search functions, are difficult for adults with limited literacy.

The following are key to an accessible format style:

Content Appeals to Diverse Racial and Ethnic Groups

To promote the use of health IT among racial and ethnic minority groups, immigrants, and English-as-a-second-language speakers, it is important to pay attention to culture and language. Health IT can be made more appealing to a multicultural audience by drawing on examples from diverse ethnicities. All information about any racial or ethnic group should be accurate and not promote stereotypes. (See Section IV for cultural competency information and resources.)

To promote the use of health IT among racially, ethnically, culturally, and linguistically diverse users, ensure that:

Content Has Undergone Iterative Testing and Revision

Following recommended guidelines helps to increase the accessibility of limited-literacy populations. It is just as important, however, that the health IT is tested repeatedly throughout the design process, and that prospective users are included in the testing. All versions in additional languages should be tested by native speakers.

The conceptual design should be assessed throughout the design process. This may include a review of the sample prototype through discussions, brainstorming, or storyboarding (a series of simple pictures to show the sequence for completing a task) with prospective users. After revision, the health IT should undergo an initial accessibility review by the design team and be tested by prospective users. The testing by prospective usersalso called a usability testshould address the following questions:

Again, the health IT should be revised based on the test results. Testing and revision should continue until there is little to be learned from additional testing.

Healthfinder.gov is an example of a Web site that has employed an iterative design process to produce a highly usable Web site. Developed by the U.S. Department of Health and Human Services as a health promotion tool, this Web site began as a paper prototype and was tested and revised over a 3-year period.

As of August 2007, the healthfinder.gov home page and “Eat Healthy” section appeared as follows:

The process for iterative testing and revision is as follows:

Guidelines for Specific Health IT

The various types of health IT discussed in this guide (Internet Web sites; computer kiosks; mobile phones, BlackBerrys, and Personal Digital Assistants; and home monitoring devices) differ in their hardware and software and how they are utilized. Thus, in addition to the general guidelines discussed, each of these forms of health IT has its own set of guidelines. Following is an overview of potential accessibility issues for each, guidelines to enhance accessibility, and other suggestions to support the development of health IT for adults with limited literacy.

Internet Web sites

Internet Web sites pose considerable barriers to their use, particularly for adults with limited literacy. As the Web site usability consultant Jakob Nielsen stated: Difficulty reading and comprehending Web site materials may be exacerbated for adults with limited literacy. The most notable difference is that users with limited literacy cannot understand a text by glancing at it. They must read word for word because they cannot skim and decide what to skip, and many times are forced to skip over large amounts of information. When they have to scroll, it breaks their concentration because they cannot scan to find where they left off. Also, searching creates problems because they have difficulty spelling. For those who successfully spell their search words, the fragmentation of search results makes it difficult for them to choose those results most relevant to their needs. Jakob Nielsen’s Alertbox, Low-Literacy Users, http://www.useit.com/alertbox/20050314.html. Accessed September 6, 2007.

Adherence to the following will help overcome many Internet Web sites’ obstacles (see the checklist in Section IV for in-depth items):

Computer Kiosks

The term “computer kiosk” may refer to both a computer and its box, or it may refer to the computer itself, because an interactive computer may function as a kiosk without the box. Often the term “kiosk” is meant to convey a computer that uses a touchscreen technology, rather than the box itself.

Computer kiosks are often used in health care facilities as a means of educating patients to care for a specific health condition. The usability of the computer kiosk depends on the person being able to quickly learn to operate the computer and application, and a message that is conveyed simply and succinctly. These applications are most effective when they use a “teach back” technique, which provides a multiple choice quiz that has the user restate the messages taught.

Checklist items specific to computer kiosks are:

Mobile Phone, BlackBerry, and Personal Digital Assistant (PDA)

As cell phones and PDAs take on Blackberry’s software and Internet capabilities, these technologies have the ability to accommodate similar health IT. Health IT for these devices is available for recording and reinforcing health behaviors and managing chronic conditions. Reminder messages can be sent through voice mail, and simple, easy-to-read reminders can be sent via text messaging. In addition, new and advanced devices are available that record and transmit biomarkering data from individuals to health care providers. The opportunity to rely on voice (rather than text) also offers the potential for increased accessibility for those with limited literacy. However, to be usable by limited-literacy populations, the device’s design and applications must be readable, accessible, and its text messages simple.

Handheld technologies are more accessible when:

Home Monitoring Devices

The increased emphasis of our health care system on home- and self-care has spurred the development of home monitoring technology for use by patients themselves or home health providers, many of whom have limited literacy. Advances in health IT now tie home monitoring devices to an information system that provides actionable information to patients and providers. Proper usage and accessibility for adults with limited literacy will depend on the design of the device, its application and interface, and the quality of the instructions provided.

Accessible home- or self-care medical devices should adhere to the following:

  1. Appropriate for home, work, and other use

  2. Display of information readable and comprehensible

  3. Compact (but still readable)

  4. Easy to operate, with limited number of steps

  5. Low maintenance

  6. Large keys with clear icons

  7. Self-calculating

  8. Stores test results

  9. Single function buttons

  10. Voice instructions and results

  11. Automatic calibration

  1. Content is readable and appropriate (as in general health IT guidelines)

  2. Instructions reiterate and review main steps

  3. Numbered steps are used to describe procedures

  4. Steps are described in the same order in which they will be performed

  5. Each step is illustrated

  6. Critical components or warnings are emphasized

  7. Phone number for customer support is provided

The last section, Section IV, lists additional resources, including tools and additional information, for the development of accessible health IT for populations with limited literacy. The complete checklist for accessible health IT for populations with limited literacy follows.

Section IV. Additional Resources

Translation of medical terminology to clear and simple English

Medicalese-English translator

http://medicalhome.alabama.gov/applications/documentlibrary/2.2.6%20LindaAndrews_com%20Medicalese%20Translator.htm.

Usability background and guidance

Jakob Nielsen's Usability Web Site: useit.com. See “Lower-Literacy Users.”

http://www.useit.com/alertbox/20050314.html.

Usability.gov. Usability Basics.

http://usability.gov/basics/whatusa.html.

Information, guidelines, and evaluation tools for accessible content for Web sites

Making Your Web Site Senior Friendly: A Checklist. National Institute on Aging and National Library of Medicine, revised Sept. 2002.

http://www.nlm.nih.gov/pubs/checklist.pdf.

The Children’s Partnership. Online Content for Low-Income and Underserved Americans: An Issue Brief by the Children’s Partnership.

http://www.techpolicybank.org/AM/Template.cfm?Section=Home&CONTENTID=9568&TEMPLATE=/CM/ContentDisplay.cfm.

The Children’s Partnership Guidelines for Content Creation and Evaluation of Web Sites, by Lazarus W and Lipper L, October 2003.

http://www.contentbank.org/AM/Template.cfm?Section=Home3&Template=/CM/ContentDisplay.cfm&ContentID=4679.

In-depth advice and guidelines for clear and simple writing

Clear & Simple: Developing Effective Print Materials for Low-Literate Readers, National Cancer Institute, updated 2/27/03.

http://www.cancer.gov/cancerinformation/clearandsimple.

Plain English Campaign. Plain English Tips for Clear Web sites.

http://www.plainenglish.co.uk/Web sitesguide.pdf.

Saying It Clearly, TalkingQuality.gov, Agency for Healthcare Research and Quality.

http://www.talkingquality.gov.

Reading level tests

Stephens C. General explanation of reading level tests.

http://plainlanguage.com/newreadability.html.

In-depth explanation of SMOG.

http://www.hsph.harvard.edu/healthliteracy/how_to/smog_2.pdf.

Flesh Kinkaid Grade Level and Flesh Reading Ease Score.

http://flesh.sourceforge.net/.

Fog Index and Readability Formulas.

http://www.klariti.com/business-writing/Fog-Index-Readability-Formulas.shtml.

Cultural competency

Planning Culturally and Linguistically Appropriate Services: A Guide for Managed Care Plans. Summary. February 2003. Agency for Healthcare Research and Quality, Rockville, MD.

http://www.ahrq.gov/about/cods/planclas.htm.

What is Cultural Competency? Office of Minority Health, U.S. Department of Health and Human Services.

http://www.omhrc.gov/templates/browse.aspx?lvl=2&lvlID=11.

Information and statistics on health literacy in the United States

Kutner M, et al. (2006) Health Literacy of America’s Adults: Results from the 2003 National Assessment of Health Literacy (NCES 2006-483). U.S. Department of Education. Washington, DC: National Center for Education Statistics.

http://nces.ed.gov/pubs2006/2006483.pdf.

Potter L, Martin C. Health Literacy Fact Sheets. Center for Health Care Strategies, Inc.

http://www.chcs.org/publications3960/publications_show.htm?doc_id=291711.

McCray AT. Promoting Health Literacy. J Am Med Inform Assoc 2005;12(2):152-163.

Berkman ND, et. al. Literacy and Health Outcomes. Evidence Report/Technology Assessment No. 87. (Prepared by RTI InternationalUniversity of North Carolina Evidence-based Practice Center under Contract No. 290-02-0016). AHRQ Publication No. 04-E007-2. Rockville, MD: Agency for Healthcare Research and Quality. January 2004.

http://www.ahrq.gov/downloads/pub/evidence/pdf/literacy/literacy.pdf.

A-2

Appendix

Accessible Health Information Technology (IT) for

Limited-Literacy Populations Checklist

Checklist for Developers and Purchasers of Health IT

For All Health Information Technologies and Applications

Yes or No

Plain and Clear Language Is Used

Words are short, simple, and familiar (1-2 syllables, no jargon, acronyms,

abbreviations)

Yes

No

Unavoidable technical terms are explained

Yes

No

Sentences are short

Yes

No

Written in “active” voice, rather than “passive” voice

(Use “Mary visited the clinic,” rather than “The clinic was visited by Mary.”)

Yes

No

Consistent use of words throughout

Yes

No

Reading level is not above 6th grade

Yes

No

Content Is Relevant to Audience

Assumes little or no background knowledge (including understanding of the body and health care system)

Yes

No

Information is relevant to users

Yes

No

Limited number of messages are delivered

Yes

No

Numbers and percentages are appropriate

  • Only one number provided per point

  • No calculations or inferences required

  • Easy to understand phrasing (e.g., 1 in 10 instead of 10 percent)

Yes

No

Graphic illustrations clarify text

  • Clearly labeled with captions to explain graphics

  • Directly applicable to text

  • Simple and understandable

  • Non-distracting and not busy

Yes

No

Format Is Conducive to Reading and Comprehension

A lot of white space (fewer words or less dense text)

Yes

No

Short line length (40-50 characters)

Yes

No

Similar information is grouped into sub-sections or “chunked”

Yes

No

Bullets are used to break up text

Yes

No

Q&A is used, as applicable

Yes

No

Dark text on light background (preferably black on white)

Yes

No

Large and familiar font (at least 12-point, Arial, Helvetica, Veranda, or Times New Roman)

Yes

No

Consistent use of font sizes and style throughout

Yes

No

Upper and lower case letters used (no “ALL CAPITAL WORDS”)

Yes

No

Justification of left-hand margin only

Yes

No

Content Appeals to Diverse Racial and Ethnic Groups

Content is culturally appropriate and sensitive to users

Yes

No

Translation is accurate and idioms and expressions are appropriate

Yes

No

Graphic illustrations are culturally appropriate and reflect target population

Yes

No

Target population is specified (if appropriate)

Yes

No

Content Has Undergone Iterative Testing and Revision

Sample prototype is drafted and reviewed

Yes

No

Accessibility is reviewed by team and health literacy experts, if feasible

Yes

No

Revised based on team and expert review

Yes

No

Tested with target audience, including limited-literacy and culturally diverse persons

  • Watched testers using it

  • Asked testers about their experience

  • Assessed testers’ comprehension

Yes

No

Revised based on tests with target audience

Yes

No

Tested in all languages (if appropriate) by native speakers

Yes

No

Checklist Items Specific to Internet Web sites

Yes or No

Designed for old hardware and software

  • Site runs without requiring Flash, Shockwave, or other plug-ins

  • Loads quickly (even on dial-up connections), with no big graphics

  • Browser independent; site displays and operates on all major browsers

  • Visuals clear on black and white monitor

  • Scales to smaller monitors

Yes

No

Home page is simple

Yes

No

Information is prioritized

  • Main point at top of page

  • Other information can be viewed without scrolling

Yes

No

Minimal amount of text per screen

Yes

No

Navigation is simple and consistent

  • Site flow is logical, with headings provided and text organized under headings

  • Main choices are placed in a linear menu

  • Limited number of navigation choices

  • Sections appropriately named

  • Home icon at the end of each section

Yes

No

Need for scrolling is minimized

  • Text placed in the window

  • Important content is in a single main column

Yes

No

Searching is simplified

  • Top search hits answer query

  • Search results are easy to understand

  • Spelling prompts are provided

  • Spelling errors are allowed or compensated for

  • Site is organized so that the need for searching is minimized

Yes

No

Links (hyperlinks) supply additional information and provide direct linkage

Yes

No

Linkage buttons (hyperlinks) are clearly identified

Yes

No

Printer-friendly option provided

Yes

No

Option for audio transcription

Yes

No

Easy-to-find site map

Yes

No

Easy-to-find contact information

Yes

No

Checklist Items Specific to Computer Kiosks

Yes or No

Preliminary practice session provided

Yes

No

One question or idea presented per screen

Yes

No

Information limited to what is needed to manage the health problem

Yes

No

Option to repeat messages

Yes

No

Audio transcription (if appropriate)

Yes

No

“Teach back” techniques used to reinforce and confirm learning

Yes

No

Checklist Items Specific to Mobile Phones, Blackberrys, and PDAs

Yes or No

Device design is accessible to adults with limited literacy

  • Large keys

  • Letters on all keys

  • Simple navigational structure

  • Increased size of device

Yes

No

Reduced reliance on text

  • Voice-to-text technology

  • Text-to-voice technology

Yes

No

Text messaging is simple

  • Uses short and familiar words

  • Accommodates common misspellings

Yes

No

Checklist Items Specific to Home- or Self-Care Medical Devices

Yes or No

Device is designed for use by adults with limited literacy

  • Appropriate for home, work, and other use

  • Display of information readable and comprehensible

  • Compact (but still readable)

  • Easy to operate, with limited number of steps

  • Low maintenance

  • Large keys with clear icons

  • Self-calculating (does not require user to compute values)

  • Stores test results and transmits them to providers (if appropriate)

  • Single function buttons

  • Voice instructions and results

  • Automatic calibration

Yes

No

Clear and easy-to-follow instructions provided through simple print and video tutorials (on-line or DVD) and help manuals

Yes

No