Online resources for strabismus: an evaluation of readability, complexity, and suitability

Over one-third of US adults have never attended college, creating a large disparity in the readability of online health materials. Decreased health literacy and accessibility to medical information negatively affect patients and well-informed patients are more likely to experience better health outcomes (1). The NIH and AMA recommend patient-intended education materials be written at a sixth-grade reading level (2), therefore, this study analyzed the accessibility of the top ten web pages for "strabismus."

The first ten online resources returned in a Google search for "strabismus" were analyzed. Web pages were then assessed for the readability level (Simple Measure of Gobbledygook), complexity (PMOSE/IKIRSCH), and suitability (Suitability Assessment of Materials). Two independent raters assessed the complexity and suitability.

Readability analysis of the strabismus resources revealed an average reading grade level of 11.4 ± 1.07. There was a statistical difference in the reading grade level between the .com and .gov, and the .org and .com websites (p = .029 and p = .031, respectively). Complexity analysis revealed a mean score of 6.50 ± 2.29, corresponding to an 8th-12th grade reading level. The suitability assessment showed a mean value of 70.3 $\pm$ 10.1%, representing a "superior" score for the information provided to the reader. The inter-rater agreement was similar for the complexity and fair for the suitability analysis.

On average, online resources for strabismus have a low complexity level. However, the majority of the top ten articles reviewed are above the recommended literacy level, indicating a need for revision.

The vast amount of available online health resources have significantly affected the field of medicine. Most patients research their disease process using online sources and many reference this material before their initial ophthalmologic consultation. Considering that more than half of Americans read below the equivalent of a sixth-grade level and that the AMA/NIH recommend all patient-intended materials to be written above this level, there is a health literacy disconnect. This limits patients' ability to educate themselves about their medical conditions and participate in informed conversations regarding their healthcare. Patients who are unable to interpret health information accurately have increased rates of hospitalization, develop more medical conditions, and experience a higher rate of mortality. This preventable impediment to informed healthcare care magnifies the urgency for easily readable online resources that are formatted in a manner that is clear to understand and suitable for patients with lower health literacy.