Knee osteotomy: Quality tools and readability data of information on the internet.

Supplementary data for the article Osteotomy around the Knee: Assessment of Quality, Content and Readability of Online Information is provided. 45 unique websites were evaluated. The DISCERN score, JAMA (Journal of the American Medical Association) benchmark criteria and HONcode (Health On the Net) criteria are provided for reference. Readability of online information was analysed with Readability Studio Professional Edition, Version 2019 (Oleander Software Ltd.). The software assessed readability using eight different instruments: Flesch-Kincaid Reading Grade Level (FKGL), Flesch Reading Ease Score (FRES), Raygor Estimate, SMOG, Coleman- Liau, Fry, FORCAST and Gunning Fog. Data is also provided on the percentage of complex words, long words, Dale-Chall unfamiliar words, Fog words, as well as the number of 'wordy' items, overly long sentences and longest sentence length.