Web usage data as a means of evaluating public health messaging and outreach.
Tian, Hao, Brimmer, Dana J, Lin, Jin-Mann S et al. · Journal of medical Internet research · 2009 · DOI
Quick Summary
This study looked at how many people visited the CDC's ME/CFS website over 18 months and what information they searched for. The website received millions of visits from around the world, showing that many people are looking for reliable information about ME/CFS. The researchers found that a public awareness campaign successfully brought more visitors to the site, and that people were more interested in professional medical information after the campaign ended.
Why It Matters
This study demonstrates that the internet is a critical resource for ME/CFS patients and healthcare providers seeking information, and reveals how public health campaigns can be optimized to reach target audiences. Understanding website usage patterns helps public health agencies improve their outreach and ensures that accurate, evidence-based ME/CFS information reaches those who need it most.
Observed Findings
The CDC CFS website received 3,647,736 views from over 50 countries over 18 months and ranked as the 33rd most popular CDC website.
States with formal CFS programs (Washington DC, Georgia, New Jersey) showed higher visiting density than other regions.
Public awareness campaigns produced sharp increases in web traffic that rapidly declined after the campaign ended.
Visitors preferred the longer (60-second) public service announcement over the shorter (30-second) version.
Most visitors completed continuing education courses in sequential order and were less likely to drop out after reaching the introduction pages.
Inferred Conclusions
The CDC CFS website serves as an important online resource reflecting high public interest in ME/CFS information.
Public awareness campaigns can effectively drive web traffic but sustained engagement requires ongoing strategic messaging.
Website visitors show a progression from seeking basic consumer information to accessing professional healthcare and research content.
Sequential course design and well-organized educational materials improve user engagement and completion rates.
Remaining Questions
Did website visitors actually gain accurate knowledge about ME/CFS, and did this information translate into improved clinical outcomes or diagnostic accuracy?
What This Study Does Not Prove
This study does not establish whether website visitors actually improved their understanding of ME/CFS or changed their clinical behavior. Web traffic alone cannot demonstrate the quality of health outcomes, diagnostic accuracy, or whether the information reached the patients most in need of it. The study is observational and cannot prove causation between campaign activities and changes in visitor behavior.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
How did demographic characteristics, disease status, or healthcare provider type of visitors affect their information-seeking behavior and course completion?
What specific aspects of the public awareness campaign drove traffic, and which messaging approaches produced sustained engagement rather than temporary spikes?
How did the quality and comprehensiveness of the CDC website compare to other online ME/CFS resources in meeting user needs?