The key finding
A systematic review published in 2025 examined six studies exploring the relationship between cancer literacy—how well people understand cancer risks, prevention, and screening—and whether they intended to get screened or actually followed through. Researchers found that higher cancer literacy was consistently linked to stronger intentions to get screened across breast, cervical, colorectal, prostate, and skin cancers. However, the connection between cancer literacy and actual screening uptake was inconsistent, with some studies showing a link and others finding none. This suggests that knowing more about cancer may motivate people to plan for screening, but other barriers may prevent them from completing it.
What the study looked like
This systematic review analyzed six cross-sectional studies published through October 2024, examining various cancer types including breast, cervical, colorectal, prostate, and skin cancer. One study focused solely on screening intention, four examined actual screening uptake, and one looked at both outcomes. The studies measured cancer literacy using either validated tools or custom questionnaires designed for specific research purposes. Participants varied widely across studies in terms of age, demographics, and screening history. Most studies were rated as fair quality using the Newcastle-Ottawa Scale, a tool for assessing observational research. The review identified important methodological limitations across the included studies, including reliance on participants’ self-reported screening behaviors rather than medical records, inconsistent definitions of what counts as “adequate” screening, and diverse target populations that made comparisons difficult.
Why researchers think this happened
The authors propose that cancer literacy may influence screening behaviors through multiple pathways, but these pathways appear to operate differently for intention versus action. Understanding cancer risks and the importance of early detection may be sufficient to motivate people to plan for screening, which could explain the consistent link with screening intentions. However, actually completing screening requires overcoming additional practical barriers—such as scheduling appointments, taking time off work, transportation challenges, cost concerns, or fear of the procedure itself—that knowledge alone cannot address. Some studies in the review suggested that awareness of preventive measures specifically may play a role in screening adherence, but this relationship varied across cancer types and study populations. The inconsistent findings for screening uptake may also reflect that cancer literacy is just one piece of a complex puzzle that includes healthcare access, social support, cultural beliefs, and past healthcare experiences.
How to read this carefully
This review included only six studies, which is a small evidence base for drawing broad conclusions about cancer literacy’s role in screening behaviors. All studies were cross-sectional, meaning they captured a snapshot in time rather than following people over time, making it impossible to determine whether higher cancer literacy actually causes increased screening or whether people who screen regularly simply learn more about cancer through that process. Most studies relied on self-reported data, which can be inaccurate as people may misremember or overreport healthy behaviors. The definitions of both “cancer literacy” and “adequate screening” varied considerably across studies, making direct comparisons challenging. Additionally, many studies didn’t account for important factors like healthcare access, insurance status, or previous screening history that could influence both cancer knowledge and screening behaviors.
What this means for everyday life
If you’ve been meaning to schedule a cancer screening, understanding more about why it matters might strengthen your resolve to make that appointment, based on this review’s findings. However, knowledge alone may not be enough to overcome practical obstacles like finding time, managing anxiety about the procedure, or navigating healthcare systems. Given these findings, it might be worth considering what specific barriers are keeping you from screening if you intend to go but haven’t followed through—whether that’s scheduling complexity, transportation, childcare, or fear of results. For healthcare providers and public health programs, this research suggests that education campaigns may successfully motivate people to want screening, but additional support addressing logistical and emotional barriers may be necessary to convert that intention into action. The inconsistent findings also remind us that factors beyond knowledge—including trust in healthcare, cultural attitudes, and access to care—likely play substantial roles in screening decisions.