• Dana Saleh, Jolene H Fisher, Steeve Provencher, Zhiying Liang, Christopher J Ryerson, and Jason Weatherald.
• University of Calgary, 2129, Department of Medicine, Calgary, Alberta, Canada.
• Ann Am Thorac Soc. 2021 Nov 23.

AbstractRationale Patients with pulmonary arterial hypertension (PAH) or their caregivers may seek information about their disease online, but the accuracy and quality of websites on PAH is not known. Objectives To assess the quality, reliability and accuracy of information on websites about PAH. Methods We searched Google, Yahoo, and Bing for "pulmonary arterial hypertension" and screened the first 200 sites from each search engine. Website quality was evaluated by two authors using the validated DISCERN tool (best score is 80) and JAMA benchmark criteria (best score is 4). Content accuracy was assessed according to 39 pre-specified disease-relevant topics from international PAH guidelines. Linear regression models and generalized estimating equations were used to assess the association between website characteristics with JAMA benchmark criteria, DISCERN scores and content scores. Results One-hundred-seventeen eligible sites were included (50% scientific organizations, 20% foundation/advocacy organizations, 14% industry/for-profit, 12% personal commentary/blogs, 4% news and media sites) with most sites hosted in North America. The median time since last website update was 1.2 years (IQR 0.4-2.6). Website readability was at the high school or college education-level (Flesh Reading Ease score 39.9±15.2, reading grade 11.9±2.7), which is more challenging than the recommendation by the American Medical Association for patient medical information to be written at 5th-6th grade levels. Only 23% had Health on the Net Code of Conduct (HONcode) certification for ethical presentation of healthcare information. Median DISCERN total score and JAMA Benchmark score were 1.5 (IQR 0.5-2.5) and 29.5 (IQR 22.5-35.5), respectively, indicating poor transparency, reliability, and quality of information. Foundation/advocacy organization sites had higher DISCERN scores compared to personal commentary/blog sites and higher content scores compared to industry/for-profit sites. Websites with HONcode certification were more reliable and had higher JAMA benchmark scores. A minority of websites addressed exercise/rehabilitation, palliative care, pregnancy, and financial concerns relevant to patients. Conclusions Most internet websites on PAH were not easily readable, comprehensive, or transparent. Using a systematic appraisal approach, we identified the highest-quality internet websites with balanced and accurate coverage of relevant issues and treatment options for patients with PAH, which may be useful for patients, caregivers, and clinicians.

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