Guideline | Grading system | Evidence level | Grade of recommendation |
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AASM2006[10] | AASM | Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ | Standard, Guideline, Option | AASM2008[12] | AASM | Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ | Standard, Guideline, Option | AASM2009[13] | AASM | 1, 2, 3 | Standard, Guideline, Option | CTS2011[41] | OCEBM | A, B, C, D | 1(1a, 1b, 1c), 2(2a, 2b, 2c), 3(3a, 3b, 3c), 4, 5 | ACP2013[14] | GRADE | High, Moderate, Low | Strong, Weak | ACP2014[15] | GRADE | High, Moderate, Low | Strong, Weak | INOSA2015[39] | AAP | A, B, C, D, X | Strong recommendation, Recommendation, Option, No recommendation | AASM-AADSM2015[17] | GRADE | High, Moderate, Low, Very low | Standard, Guideline, Option | DG-HNO-KHC2016[37] | OCEBM | A, B, C, D | A, B, C, D | SASM2016[18] | GRADE | High, Moderate, Low, Very low | Strong, Weak | AASM2017[19] | GRADE | High, Moderate, Low, Very low | Strong, Weak | ASMBS017[20] | OCEBM | High, Moderate, Low, Very low | Strong, Weak | SASM2018[22] | GRADE | High, Moderate, Low, Very low | Strong, Weak, No recommendation | CMDA2018[32] | GRADE | High, Moderate, Low, Very low | Strongly recommended, Weakly recommended, Weakly against, Strongly against | ATS2018[23] | GRADE | High, Moderate, Low, Very low | Strong, Conditional | AASM2019[24] | GRADE | High, Moderate, Low, Very low | Strong, Conditional | VA-DoD2020[25] | GRADE | Unreported | Strong, Weak | JRS2021[42] | MINDS | A-Strong, B-Moderate, C-Weak, D-Very weak | Strong, Weak, No recommendation | AASM-2021[27] | GRADE | High, Moderate, Low, Very low | Strong, Conditional | ERS2021[44] | GRADE | High, Moderate, Low, Very low | Strong, Conditional | USPSTF2022[28] | USPSTF | High, Moderate, Low | A, B, C, D, I | GSDSM2022[38] | AWMF | 1, 2, 3, 4 | A, B, C, D | SFORL2022[34] | GRADE | 1, 2, 3, 4 | A, B, C |
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