Fig. A3.
(A) Results of multivariable analysis examining the association between recommendations supported by level of evidence A versus level of evidence C and year of publication, controlling for specialty, strength of recommendation, region, and grading methodology using multinomial logistic regression. This analysis included original and updated guidelines. (B) Results of multivariable analysis examining the association between recommendations supported by level of evidence B versus level of evidence C and year of publication, controlling for specialty, strength of recommendation, region, and grading methodology using multinomial logistic regression. This analysis included original and updated guidelines.