Terwee CB, Prinsen C, Chiarotto A, De Vet H, Bouter LM, Alonso J, et al. COSMIN methodology for assessing the content validity of PROMs-user manual. Amsterdam: VU University Medical Center; 2018. Google Scholar Lawshe CH. A quantitative approach to content validity. Pers Psychol. 1975;28(4):563-75. The quality of content validity and reliability of the included tools was sufficient except for the reliability of the maternal-fetal triage index. et al. COSMIN methodology for systematic reviews of patient-reported outcome measures (PROMs). User manual. 2018;78:1. Google Scholar Terwee CB, Prinsen C, Chiarotto A, de Vet H, Bouter LM Terwee C, Prinsen C, Chiarotto A, De Vet H, Bouter L, Alonso J, et al. COSMIN methodology for assessing the content validity of PROMs-user manual. 2018:1-73. Mokkink L, Terwee C, Knol D, Stratford P, Alonso J, Patrick D, et al. Protocol of the COSMIN study: COnsensus-based Standards for the selection of health Measurement INstruments. Detailed information supporting the conduct of a systematic review can be found in the accompanying "COSMIN methodology for systematic reviews of PROMs—user manual", as well as in the "COSMIN methodology for assessing the content validity of PROMs—user manual", available on the COSMIN website [8‐10]. These user manuals are A topic guide (see Table 1) for the assessment of content validity was inspired by another content validity study and developed in accordance with the COnsensus-based Standards for the selection of health Measurement COSMIN methodology for systematic reviews of patient-reported outcome measures (PROMs) - user manual. Available at: We used the COSMIN methodology to classify each PROM into three possible categories that have different implications regarding the potential to recommend one PROM over another. From the five validated questionnaires included, only two (CSSQP [ 32 ] and Post-procedure questionnaire [ 35 ]) showed sufficient content validity and internal Patient-reported outcome measures (PROMs) are reported by the patient and designed to capture patients' unique perspectives of their symptoms, quality of life, function, disability, and overall health status. Despite their important role in the health care landscape, it is important to recognize that PROMs have numerous shortcomings. The most recent version of the COSMIN consists of a manual for conducting systematic reviews of health instruments, providing different steps with respect to the literature search process, the assessment of measurement properties and feasibility of instruments, COSMIN methodology for assessing the content validity of PROMs: user manual. We scored the summarised content validity for each PROM, averaging across all the content validity scores previously assigned to each individual study. According to the COSMIN methodology, greater importance is given to psychometric properties such as construct validity and internal consistency scores. Terwee CB, et al. COSMIN methodology for evaluating the content validity of patient-reported outcome measures: a Delphi study. Qual Life Res. 2018;27(5):1159-70. CAS Article Google Scholar Whiting PF, et al. QUADAS-2: a revised tool for the quality assessment of diagnostic accuracy studies. manual' andOSMIN'C methodology for asse