7.2 Plain Language and Health Literacy

Writing so people can use the message

Health literacy is more than reading ability. It includes the ability to find, understand, judge, and use information in a real decision. A person with strong general reading skills can still struggle with a medical form, insurance instructions, risk numbers, or a stressful diagnosis. For CHES practice, assume health literacy is a shared responsibility between the communicator and the system.

Plain-language checks include:

• Lead with the action the reader needs to take.
• Use familiar words and define necessary technical terms.
• Test whether the intended audience can use the material.

Plain language means the audience can understand and use the information the first time they read or hear it. It is not childish language. It is organized communication. The writer chooses familiar words, short sentences, logical headings, active voice, and direct action steps. The goal is not to remove all detail. The goal is to remove avoidable confusion.

A strong plain-language message starts with the behavior or decision. Instead of leading with a long explanation of hypertension, a blood pressure handout might begin with, "Check your blood pressure twice this week and write down the numbers." The explanation can follow. People need to know what to do, why it matters, when to do it, and where to get help.

CHES scenarios may include technical terms. Some terms must stay because they are used in clinical care, consent, or instructions. In that case, define the term in plain language near the first use. For example, "A1C is a blood test that shows your average blood sugar over about three months." Avoid strings of terms such as morbidity, compliance, contraindication, and asymptomatic unless the audience profile supports them.

Numeracy is a common communication barrier. Percentages, ratios, dose schedules, and risk comparisons can confuse people. Use consistent denominators when comparing risks. Say "3 out of 100" and "6 out of 100" instead of mixing percentages and fractions. Use visuals carefully, and make sure charts do not exaggerate differences. When instructions involve time or dose, use concrete examples.

Layout matters. Dense blocks of text can defeat otherwise accurate content. Use headings that tell people what the section is about. Put the most important action first. Use bullets for steps. Leave enough white space. Choose readable fonts and contrast. Avoid all caps for long text. Make sure mobile layouts do not hide essential information.

Translation is not the same as health literacy adaptation. A literal translation may preserve words but lose meaning, tone, or cultural fit. A better process includes professional translation, review by native speakers familiar with the health context, and testing with members of the intended audience. Images and examples may also need adaptation.

Plain language should be tested. A CHES might use cognitive interviews, usability testing, or teach-back with draft materials. Ask participants what they think the message asks them to do. Watch where they hesitate. Revise based on observed confusion, not only on readability formulas. Readability scores can help, but they cannot prove that a message is culturally relevant, trustworthy, or actionable.

Respect is central. Never frame low health literacy as a personal failure. Health systems, forms, risk statistics, and professional jargon create barriers. The CHES role is to lower those barriers while preserving accuracy. On the exam, the best answer often combines plain words, clear action, audience testing, and dignity.