This article is for information only and is not medical advice.
Yes. What you believe about your illness shapes your health literacy — how you find and understand health information. In a 2026 study of 455 people with inflammatory bowel disease, published in Scientific Reports, researchers found that worsening illness perceptions were followed, months later, by greater difficulty understanding written health information.
The reverse was not true: struggling with health information did not predict worsening beliefs. That asymmetry is the headline finding, and it suggests beliefs come first, and the ability to engage with health information follows.
In this article:
- What the new study did
- What the study found
- Why health literacy and illness perceptions matter
- Four ways patients can improve their health literacy
- Frequently asked questions
What the new study did
The study, led by Caterina Mercuri and colleagues and published in Scientific Reports on 15 September 2026, was a multicentre prospective longitudinal study of 455 people living with inflammatory bowel disease (IBD) across nine Italian specialized centres.
Participants were assessed at baseline, at 6 months, and at 12 months.
Perceived functional health literacy was measured with the Single Item Literacy Screener (SILS), which asks how often someone has difficulty understanding written health information.
Illness perceptions were measured with the Brief Illness Perception Questionnaire (BIPQ), which captures how threatening, controllable, and understandable patients find their condition.
The team analyzed the data with a Bayesian random-intercept cross-lagged panel model, a technique designed to separate stable differences between people from real changes happening within each person over time. (If reading statistics in papers feels difficult, our plain-English guide to p-values is a good starting point.)
What the study found
The numbers tell a directional story. When a person’s illness perceptions worsened, their perceived health literacy difficulties increased in the following months: posterior estimate 0.18, with a 95% credible interval of 0.07 to 0.28, meaning the effect clearly excluded zero.
The reverse path, from literacy difficulties back to illness perceptions, was not credible: posterior estimate 0.25, with a 95% credible interval of -0.04 to 0.53, which crosses zero and therefore does not support the effect.
Three other findings add context. First, older age, male gender, and Crohn’s disease (rather than ulcerative colitis) were stable predictors of both constructs throughout the study.
Second, difficulty with health information was sticky: once present, it persisted strongly across waves (beta 0.63). Third, illness perceptions fluctuated more and tended to revert toward the average over time (beta -0.27).
The authors conclude that the relationship is asymmetric and driven by within-person change, and they call for integrated psychological support in IBD care.
Why health literacy and illness perceptions matter
Illness perceptions are the beliefs patients hold about their condition: what caused it, how long it will last, what consequences it carries, and how much control they have over it.
Health literacy is the practical ability to obtain, understand, and use health information. The study matters because it shows these two are not just correlated: changes in beliefs come before changes in understanding.
This fits a wider evidence base. A 2024 systematic review of health literacy in IBD reported that patients with lower literacy skills experience feelings of helplessness, difficulty understanding how their disease will progress, and greater psychological vulnerability.
The same review linked insufficient health literacy to poorer quality of life, and found that targeted educational programs improve knowledge while reducing stress and uncertainty about disease management. In other words, how patients think and feel about their illness shapes how they manage it, and better information support can break the cycle.
Four ways patients can improve their health literacy
These are general, evidence-grounded habits any patient can adopt, whatever the condition.
1. Use the teach-back technique
After receiving instructions, repeat them back in your own words: “So I take the tablet twice daily with food. Is that right?” Teach-back is one of the best-validated ways to confirm understanding, and clinicians generally welcome it.
2. Bring a written list to appointments
Write down your medications and doses, plus your top three questions, before every visit. A short list turns a rushed appointment into a focused one and means nothing important slips away.
3. Stick to sources your clinician recommends
Random search results mix solid guidance with noise. Ask your care team which websites, leaflets, or patient organizations they trust, and treat those as your home base for information.
4. Keep a simple symptom diary
A brief daily note on symptoms, flares, food, stress, and medication changes gives your clinician far better material to work with than memory alone. It also helps you spot patterns in your own condition.
Frequently asked questions
What are illness perceptions, exactly?
They are a patient’s beliefs about their illness: its identity, cause, timeline, consequences, controllability, and emotional impact. Researchers measure them with the Brief Illness Perception Questionnaire (BIPQ). More negative perceptions are linked to worse self-care across many chronic conditions.
Does this mean positive thinking cures IBD?
No. The study does not show that beliefs cure disease or that information difficulties cause flares. It shows that beliefs predict how well patients engage with health information, which is a separate and actionable pathway. Psychological support complements medical treatment; it never replaces it.
What is the Single Item Literacy Screener?
It is a validated one-question screening tool that asks how often a person has difficulty understanding written health information. Its brevity makes it practical in busy clinics, which is why researchers use it to flag patients who may need extra communication support.
Sources: Mercuri C et al., Scientific Reports 2026 (the IBD illness-perceptions study); https://www.mdpi.com/2077-0383/14/23/8577