90 Chapter 5 Methods & Materials The COnsensus-based Standards for the selection of health Measurement Instruments (COSMIN) initiative has written an extensive manual for selection and assessment and checklists for individual PROMS and systematic reviews on PROMS.3-8 An extensive systematic mapping review on all otology questionnaires up until August 26, 2019 was conducted by Viergever et al.9 The search to this review was repeated on the 28th of April 2021 and conducted to identify English-language, peer-reviewed journal articles published between 2000 and the April 2021. Search and article selection Inclusion and exclusion criteria used for the assessment of questionnaire eligibility are listed in Table 1. We specifically wanted to evaluate potential ear domain specific questionnaires that address more than one ear complaint in adult patients, that are not reported by proxy respondents. Table 1: Inclusion and exclusion criteria used for the assessment of questionnaire eligibility INCLUSION CRITERIA EXCLUSION CRITERIA Exclusively closed-ended questions Presence of open-ended questions Adult population (≥ 18 yrs) Paediatric population (< 18 yrs) Copy of questionnaire available No copy of the questionnaire available Availability of a development or validation paper in English No availability of a development or validation paper in English Questionnaire addressing otology complaints Proxy-reported questionnaires Assessment of Methodological Quality of included studies The assessment of the questionnaires was done by the first (JK) and last (DP) author independently. One questionnaire at a time was assessed. All differences in assessment were discussed in detail after which agreement was reached in all cases. The COSMIN methodology for systematic reviews of Patient-Reported Outcome Measures and Risk of bias checklist were used to assess the methodological quality of each study. Studies were stratified as having very good, adequate, doubtful or inadequate methodological quality. If there was no data available about an item or f it was not performed, we assessed it as not available (NA)
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