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. 2023 Dec 26;67(1):296–345. doi: 10.1044/2023_JSLHR-22-00716

Figure 2.

2 flow diagrams. The steps for identification of studies via databases are as follows. 1. Records identified from databases, n = 5,101. The number of duplicate records removed before screening in step 1 is n = 1,012. Step 1 falls under the identification phase. 2. Records screened, n = 4,089. The number of records excluded in step 2 is n = 3,862. 3. Records sought for retrieval, n = 227. The number of records not retrieved in step 3 is n = 0. 4. Records assessed for eligibility, n = 227. The number of records excluded in step 4 is 118. The breakup of the excluded records is as follows. No auditory measure, n = 6. No cognitive measure, n = 8. Measures not compared, n = 16. Wrong study design or publication type, n = 87. Steps 2, 3, and 4 fall under the screening phase. 5. Records identified from second literature review, n = 7. The number of records excluded in step 5 because the measures were not compared is n = 4. Step 5 falls under Round 2. 6. The number of studies included in review is n = 126. Step 6 falls under the inclusion phase. The steps for identification of studies via other methods are as follows. 1. Records identified from subject experts is n = 11 and the records identified from citation searching is n = 15. Step 1 falls under the identification phase. 2. The number of records sought for retrieval is n = 26. The records not retrieved in step 2 is n = 0. 3. The number records assessed for eligibility is n = 26. The number of records excluded in step 3 is 12. The breakup of the excluded records is as follows. No auditory measure, n = 3. No cognitive measure, n = 1. Measures not compared, n = 3. Wrong study design or publication type, n = 5. Steps 2 and 3 fall under the screening phase. Step 3 leads to step 6 of the first flow diagram.

Flow diagram following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines for identifying, screening, and including articles.