“…For each document, the well-validated Flesch-Kincaid Grade Level (FKGL) formula was used to analyze written material readability in terms of academic grade levels [2,5,13,17,44,47,54,58,63]. Although there are various readability assessment tools used in the healthcare setting, the FK formula is the most widely validated method of analyzing readability [2,5,13,17,44,47,54,58,63] The FKGLs of the AAOS articles were compared with the AMA/NIH-recommended readability level (sixth grade) [18,22,36,59,60] as well as the mean US adult reading level (eighth grade) [21,43,51] with data throughout the article being presented as mean ± SD except where otherwise specified and comparisons being performed using unpaired t-tests.…”