Corrigendum.

Schwartz SR, Magit AE, Rosenfeld RM, et al. Clinical practice guideline (update): earwax (cerumen impaction). Otolaryngol Head Neck Surg. 2017;156(1)(suppl):S1-S29. (Original DOI: 10.1177/0194599816671491) Schwartz SR, Magit AE, Rosenfeld RM, et al. Clinical practice guideline (update): earwax (cerumen impaction) executive summary. Otolaryngol Head Neck Surg. 2017;156(1):14-29. (Original DOI: 10.1177/0194599816678832) In the Clinical Practice Guideline Update and its Executive Summary, the new evidence was misstated. In the abstracts, "Differences from Prior Guideline," and "General Methods and Literature Search" sections of both pieces, the new evidence was described as being from "from 1 guideline, 6 systematic reviews, 5 randomized controlled trials, and 6 observational studies"; this should have read "1 guideline, 4 systematic reviews, and 5 randomized controlled trials." In addition, the fourth paragraph of the Methods section of the guideline and its executive summary ("Clinical Practice Guideline" p. 5, "Executive Summary" p. 3), which describe the English-language search, only included the quality criteria for systematic reviews and omitted the quality criteria for clinical practice guidelines and randomized controlled trials. This information has been included in the revised version below. Also included is a short section, required by the National Guidelines Clearinghouse, that explicitly states that the clinical practice guideline was based on systematic reviews. The initial English-language search identified 1 potential clinical practice guideline, 7 systematic reviews, 5 randomized controlled trials, and 10 other studies. All searches were conducted on April 3, 2015. Clinical practice guidelines were included if they met quality criteria of (a) an explicit scope and purpose, (b) multidisciplinary stakeholder involvement, (c) systematic literature review, (d) explicit system for ranking evidence, and (e) explicit system for linking evidence to recommendations. Systematic reviews were emphasized and included if they met quality criteria of (a) clear objective and methodology, (b) explicit search strategy, and (c) valid data extraction methods. Randomized controlled trials were included if they met quality criteria of (a) trials involved study randomization, (b) trials were described as double blind, or (c) trials denoted a clear description of withdrawals and dropouts of study participants. Additional evidence was identified, as needed, with targeted searches to support needs of the guideline development group in updating sections of the guideline text. Specifically, ear candling/coning was identified as an area of concern by the reviewers. The databases were also searched using both controlled vocabulary words and synonymous free text words for the topic of interest (ear candling and ear coning) in this population. The search strategies were adjusted for the syntax appropriate for each database/platform. The search was not limited by date range or study design but was limited to the English language. Therefore, in total, the evidence supporting this guideline includes 1 clinical practice guideline, 4 systematic reviews, and 5 randomized control trials. The recommendations in this clinical practice guideline are based on systematic reviews identified by a professional information specialist using an explicit search strategy. Additional background evidence included randomized controlled trials and observational studies, as needed, to supplement the systematic reviews or to fill gaps when a review was not available.