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Systematic review finds online cleft care materials exceed recommended readability levels

Systematic review finds online cleft care materials exceed recommended readability levels
Photo by Marek Studzinski / Unsplash
Key Takeaway
Note that online cleft care materials exceed recommended readability levels.

This systematic review and meta-analysis evaluated online patient education materials for cleft care. The authors analyzed nine studies to determine if the text complexity aligns with recommended readability standards. The scope included materials for cleft lip and cleft palate care found in PubMed, Scopus, and Embase databases.

The pooled results indicate that the Flesch-Kincaid Grade Level was 9.48 (95% CI: 8.51-10.45). The Flesch Reading Ease score averaged 52.98 (95% CI: 42.62-63.34). The SMOG Index yielded a result of 9.27 (95% CI: 5.97-12.57). The Gunning Fog Index result was 9.94 (95% CI: 8.90-10.98). All these metrics exceed recommendations.

Heterogeneity analysis showed an I² value of 0%. The authors noted that artificial intelligence tools lacked usability and comprehension testing. The review highlights that online patient education materials for cleft care are consistently written at reading levels too complex for the average caregiver.

The study did not report adverse events or discontinuations. Funding or conflicts were not reported. The authors caution against inferring causality from pooled readability estimates or assuming clinical outcomes from readability metrics. Improved readability and accessibility are needed for this patient population.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedMay 2026
View Original Abstract ↓
ObjectiveTo evaluate the readability of online patient education materials (PEMs) for cleft lip and/or palate and assess their alignment with recommended readability levels.DesignThis study is a systematic review and meta-analysis.SettingLiterature search conducted in PubMed, Scopus, and Embase databases following PRISMA guidelines.MaterialsStudies evaluating online PEMs for cleft care with reported readability metrics, including Flesch-Kincaid Grade Level, Flesch Reading Ease, SMOG Index, or Gunning Fog Index.InterventionsAssessment of readability metrics of online PEMs and evaluation of artificial intelligence tools (eg, ChatGPT) for text simplification.Main Outcome Measure(s)Pooled readability estimates (eg, Flesch-Kincaid Grade Level, Flesch Reading Ease, SMOG Index, Gunning Fog Index), heterogeneity (I²), and confidence intervals (CIs).ResultsNine studies were included, consistently showing that PEMs exceed readability recommendations. Pooled estimates revealed a Flesch-Kincaid Grade Level of 9.48 (95% CI: 8.51-10.45), Flesch Reading Ease score of 52.98 (95% CI: 42.62-63.34), SMOG Index of 9.27 (95% CI: 5.97-12.57), and Gunning Fog Index of 9.94 (95% CI: 8.90-10.98). Heterogeneity was minimal (² = 0%). Artificial intelligence tools like ChatGPT demonstrated potential in simplifying text to the recommended sixth-grade reading level but lacked usability and comprehension testing.ConclusionsOnline PEMs for cleft care are consistently written at reading levels too complex for the average caregiver, underscoring the need for improved readability and accessibility. Future research should focus on developing multimodal resources, conducting usability assessments, and including non-English materials to address global disparities in cleft care education.
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