COSMIN Risk of Bias tool to assess the quality of studies on reliability or measurement error of outcome measurement instruments: a Delphi study
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Abstract
Background: Scores on an outcome measurement instrument depend on the type and settings of the instrument used, how instructions are given to patients, how professionals administer and score the instrument, etc. The impact of all these sources of variation on scores can be assessed in studies on reliability and measurement error, if properly designed and analyzed. The aim of this study was to develop standards to assess the quality of studies on reliability and measurement error of clinician-reported outcome measurement instruments, performance-based outcome measurement instrument, and laboratory values. Methods: We conducted a 3-round Delphi study involving 52 panelists. Results: Consensus was reached on how a comprehensive research question can be deduced from the design of a reliability study to determine how the results of a study inform us about the quality of the outcome measurement instrument at issue. Consensus was reached on components of outcome measurement instruments, i.e. the potential sources of variation. Next, we reached consensus on standards on design requirements ( n = 5), standards on preferred statistical methods for reliability ( n = 3) and measurement error ( n = 2), and their ratings on a four-point scale. There was one term for a component and one rating of one standard on which no consensus was reached, and therefore required a decision by the steering committee. Conclusion: We developed a tool that enables researchers with and without thorough knowledge on measurement properties to assess the quality of a study on reliability and measurement error of outcome measurement instruments.
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“Notably, a number of tools such as the COSMIN extensions (Gagnier et al., 2021; Mokkink et al., 2016, 2018, 2020; Prinsen et al., 2016, 2018; Terwee et al., 2018) and the ConPsy checklist (Vitoratou et al., 2024) are also available to guide the development and evaluation of psychometric instruments…”
MethodUljarević, M., Spackman, E. K., Whitehouse, A., Frazier, T. W., Billingham, W., Condron, P., Hardan, A. Y., & Leekam, S. (2023) · Clinical Psychology Review · doi:10.1016/j.cpr.2023.102286 · Cited by 27 · see citing works
Waiteman, M. C., Garcia, M. C., Briani, R. V., Norte, G. E., Glaviano, N. R., de Azevedo, F. M., & Bazett-Jones, D. M. (2023) · Journal of Orthopaedic and Sports Physical Therapy · doi:10.2519/jospt.2023.12045 · Cited by 26 · see citing works
MacRae, J. M., Harasemiw, O., Lightfoot, C. J., Thompson, S., Wytsma-Fisher, K., Koufaki, P., Bohm, C. J., & Wilkinson, T. J. (2023) · Clinical Kidney Journal · doi:10.1093/ckj/sfad170 · Cited by 26 · see citing works
“…measurement property ( very good/adequate/doubtful/inadequate ) and reached consensus on each item in the checklist, as it applied to the individual study; the rankings derived from this then informed the overall RoB score using the COSMIN RoB tool [ 15 , 17 ] ( Supplementary Material 3 and 4 ) .”
BackgroundMethodInfluentialElsman, E. B. M., Mokkink, L. B., Terwee, C. B., Beaton, D., Gagnier, J. J., Tricco, A. C., Baba, A., Butcher, N. J., Smith, M., Hofstetter, C., et al. (2024) · Journal of Patient-Reported Outcomes · doi:10.1186/s41687-024-00727-7 · Cited by 25 · see citing works
“An OMI consists of a set of components and phases, i.e., ‘equipment’, ‘preparatory actions’, ‘collection of raw data’, ‘data processing and storage’, and ‘assignment of the score’ [57].”
BackgroundMethodInfluentialSelf-citationScataglini, S., Fontinovo, E., Khafaga, N., Khan, M. U., Khan, M. F., & Truijen, S. (2025) · Sensors · doi:10.3390/s25175513 · Cited by 25 · see citing works
“The Consensus-Based Standards for the Selection of Health Measurement Instruments (COSMIN) [26,27] was used for methodological quality appraisal.”
InfluentialBarbosa, G. M., Calixtre, L. B., Fialho, H. R. F., Locks, F., & Kamonseki, D. H. (2023) · Brazilian Journal of Physical Therapy · doi:10.1016/j.bjpt.2023.100575 · Cited by 27 · see citing works
“The methodological quality of inter-session SEM and the MDC 95 was very good, 9,10 and no evidence was established for measurement error because the MIC have not been de fi ned.”
BackgroundMethodInfluentialA practical guide for selecting continuous monitoring wearable devices for community-dwelling adults
Lu, J. K., Wang, W., Goh, J., & Maier, A. B. (2024) · Heliyon · doi:10.1016/j.heliyon.2024.e33488 · Cited by 25 · see citing works
“The COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) Risk of Bias tool was integrated to ensure a procedure for evaluating technical performance and validation was included [13].”
BackgroundMethodInterpreting Change in Disorders of Consciousness Using the Coma Recovery Scale-Revised
Weaver, J., Cogan, A. M., Kozlowski, A. J., Grady-Dominguez, P., O’Brien, K. A., Bodien, Y. G., Graham, J. E., Aichele, S., Ford, P., Kot, T., et al. (2024) · Journal of Neurotrauma · doi:10.1089/neu.2023.0567 · Cited by 24 · see citing works
Within-subject variation of HbA1c: A systematic review and meta-analysis
Gough, A., Sitch, A. J., Ferris, E., & Marshall, T. P. (2023) · PLoS ONE · doi:10.1371/journal.pone.0289085 · Cited by 22 · see citing works
Atigossou, O. L. G., Honado, A. S., Routhier, F., & Flamand, V. H. (2021) · Assistive Technology · doi:10.1080/10400435.2021.2010149 · Cited by 22 · see citing works
“The COnsensus-based Standards for the Selection of Health Measurement INstruments Risk of Bias checklist (COSMINRoB) was used to critically appraise the risk of bias of each psychometric data reported in each of the included studies (Mokkink et al., 2020, 2018).”
MethodThron, M., Düking, P., Ruf, L., Härtel, S., Wöll, A., & Altmann, S. (2024) · PLoS ONE · doi:10.1371/journal.pone.0296866 · Cited by 22 · see citing works
Oliveira, H. C., Neto, D. H., Carvalho, S. D. L., de Barros, R. D. C. L., Neves, M. L. D. S., Andrechuk, C. R. S., Alexandre, N. M. C., Ribeiro, P. A. B., & Rodrigues, R. C. M. (2023) · Systematic Reviews · doi:10.1186/s13643-023-02340-z · Cited by 24 · see citing works
Yu, H., Sun, C., Sun, B., Chen, X., & Tan, Z. (2021) · International Journal of Environmental Research and Public Health · doi:10.3390/ijerph182412912 · Cited by 21 · see citing works
“For analyses where I2 was less than 50%, a fixed-effects model was used; if I2 was more than 50%, a random-effects model was employed [53].”
InfluentialAutomatic market research of mobile health apps for the self‐management of allergic rhinitis
Antó, A., Sousa‐Pinto, B., Czarlewski, W., Pfaar, O., Bosnic-Anticevich, S. Z., Klimek, L., Matricardi, P. M., Tripodi, S., Fonseca, J., Antó, J. M., et al. (2022) · Clinical & Experimental Allergy · doi:10.1111/cea.14135 · Cited by 21 · see citing works
The empty pelvis syndrome: a core data set from the PelvEx collaborative
Collaborative, P., Mirnezami, A. H., Drami, I., Glyn, T., Sutton, P. A., Tiernan, J. P., Behrenbruch, C., Guerra, G., Waters, P. S., Woodward, N., et al. (2024) · British journal of surgery · doi:10.1093/bjs/znae042 · Cited by 22 · see citing works
“Two studies were identified that calibrated the size of the empty pelvic cavity following PE to measure the size of appropriate breast implants for pelvic filling and reduction of dead space; however, these were not feasible and were inadequate using the COSMIN risk of bias tool 13,45,89”
MethodElsman, E. B. M., Mokkink, L. B., Terwee, C. B., Beaton, D., Gagnier, J. J., Tricco, A. C., Baba, A., Butcher, N. J., Smith, M., Hofstetter, C., et al. (2024) · Health and Quality of Life Outcomes · doi:10.1186/s12955-024-02256-9 · Cited by 30 · see citing works
“The COSMIN Risk of Bias tool to assess the quality of studies on reliability or measurement error of OMIs can be used for any type of OMI [57]”
InfluentialSelf-citationPettit, M. H., Kanavathy, S., McArthur, N., Weiss, O., & Khanduja, V. (2022) · The Journal of Arthroplasty · doi:10.1016/j.arth.2022.05.029 · Cited by 20 · see citing works
Zhu, Z., Xing, W., Wen, H., Sun, Y., So, W. K. W., Lizarondo, L. M., Peng, J. W., & Hu, Y. (2022) · BMJ Open · doi:10.1136/bmjopen-2021-057215 · Cited by 20 · see citing works
Identifying and appraising outcome measures for severe asthma: a systematic review
Rattu, A., Khaleva, E., Brightling, C. E., Dahlén, S., Bossios, A., Fleming, L., Chung, K. F., Melén, E., Djukanović, R., Chaudhuri, R., et al. (2022) · European Respiratory Journal · doi:10.1183/13993003.01231-2022 · Cited by 20 · see citing works
Gough, A., Sitch, A. J., Ferris, E., & Marshall, T. P. (2024) · PLoS ONE · doi:10.1371/journal.pone.0304961 · Cited by 22 · see citing works
Update on the psychometric properties for the Italian version of the Aachen Aphasia Test (IT-AAT)
Luzzatti, C., Bleser, R. D., Scola, I., Frustaci, M., & Willmes, K. (2022) · Aphasiology · doi:10.1080/02687038.2022.2037501 · Cited by 19 · see citing works
Walsh, C. B., Cahalan, R., Hinman, R. S., & Sullivan, K. O. (2022) · PLoS ONE · doi:10.1371/journal.pone.0274349 · Cited by 19 · see citing works
“The methodological quality of each of the included studies was evaluated by two independent authors (CBW & KOS) using the COSMIN risk of bias checklist and scores were determined by consensus [34].”
InfluentialPsychometric properties of functional postural control tests in children: A systematic review
Johnson, C., Hallemans, A., Goetschalckx, M., Meyns, P., Rameckers, E. A. A., Klingels, K., & Verbecque, E. (2023) · Annals of Physical and Rehabilitation Medicine · doi:10.1016/j.rehab.2022.101729 · Cited by 19 · see citing works
Lunny, C., Veroniki, A. A., Hutton, B., White, I. R., Higgins, J., Wright, J. M., Kim, J. Y., Thirugnanasampanthar, S. S., Siddiqui, S., Watt, J. A., et al. (2022) · BMJ Evidence-Based Medicine · doi:10.1136/bmjebm-2022-111944 · Cited by 18 · see citing works
A systematic review of validated assessments methods for head and neck lymphedema
Arends, C. R., Lindhout, J. E., van der Molen, L., Wilthagen, E. A., van den Brekel, M. W. M., & Stuiver, M. M. (2023) · European Archives of Oto-Rhino-Laryngology · doi:10.1007/s00405-023-07841-0 · Cited by 18 · see citing works
“For studies on clinician-rated instruments, we used the COSMIN Risk of Bias tool for assessing the quality of studies on reliability and measurement error of outcome measurement instruments [31].”
MethodAssessing parental emotion regulation in the context of parenting: A systematic review
Zhang, X.-T., Beatty, A. E., Abela, K. R., Melo, M. F., Kenny, M., Atkinson, L., & Gonzalez, A. (2023) · Developmental Review · doi:10.1016/j.dr.2023.101092 · Cited by 19 · see citing works
AlDahas, A., Heneghan, N. R., Althobaiti, S., Deane, J. A., Rushton, A. B., & Falla, D. (2024) · BMC Musculoskeletal Disorders · doi:10.1186/s12891-023-07111-4 · Cited by 18 · see citing works
“…reliability and measurement error of outcome measurement instruments as well as the COSMIN methodology for systematic reviews of Patient-Reported Outcome Measures (PROMs) [13, 14] and is reported in accordance with the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) [15].”
MethodInfluentialAtaman, R., Alhasani, R., Auneau-Enjalbert, L., Quigley, A., Michael, H. U., & Ahmed, S. (2024) · Journal of Patient-Reported Outcomes · doi:10.1186/s41687-024-00743-7 · Cited by 17 · see citing works
“The overall rating of the methodological quality for a measurement property was based on the worst item rating [16, 24].”
MethodZhou, J., Yao, Q., Han, R., Bock, P. D., Vassard-Yu, G., Hallemans, A., & Laer, L. V. (2025) · Archives of Physical Medicine and Rehabilitation · doi:10.1016/j.apmr.2025.03.001 · Cited by 17 · see citing works
Geppert, J., Auguste, P., Asgharzadeh, A., Ghiasvand, H., Patel, M., Brown, A., Jayakody, S., Helm, E., Todkill, D., Madan, J., et al. (2025) · Health Technology Assessment · doi:10.3310/jytw8921 · Cited by 16 · see citing works
Ataman, R., Thomas, A., Roberge‐Dao, J., McKerral, M., Auger, C., Wittich, W., Talla, P. K., Boychuck, Z., & Ahmed, S. (2023) · Archives of Physical Medicine and Rehabilitation · doi:10.1016/j.apmr.2022.12.196 · Cited by 17 · see citing works
Measures of financial toxicity in cancer survivors: a systematic review
Thomy, L. B., Crichton, M., Jones, L. V., Yates, P. M., Hart, N. H., Collins, L. G., & Chan, R. J. (2024) · Supportive Care in Cancer · doi:10.1007/s00520-024-08601-4 · Cited by 17 · see citing works
“COSMIN criteria requires evaluation of relevance, comprehensive-ness, and comprehensibility in the assessment of content validity [15]].”
BackgroundInfluentialClinically relevant estimation of minimal number of trials for the uncontrolled manifold analysis
Piscitelli, D., Buttram, A., Abernathy, K., Canelón, J., Knighten, D., & Solnik, S. (2024) · Journal of Biomechanics · doi:10.1016/j.jbiomech.2024.112195 · Cited by 17 · see citing works
Williams, L. J., Loetscher, T., Hillier, S., Hreha, K. P., Jones, J., Bowen, A., & Kernot, J. (2024) · Neuropsychological Rehabilitation · doi:10.1080/09602011.2024.2346212 · Cited by 16 · see citing works
“This study is the first to report on the quality of the psychometric evidence for spatial neglect tools, as standards for evaluating the evidence such as COSMIN (Mokkink et al., 2020) have only recently been developed.”
InfluentialMárquez, M. A., Speroni, A., Galeoto, G., Ruotolo, I., Sellitto, G., Tofani, M., Gonzalez-Bernal, J. J., & Berardi, A. (2022) · Spinal Cord Series and Cases · doi:10.1038/s41394-022-00492-z · Cited by 16 · see citing works
Zapata-Figueroa, V., & Ortiz‐Corredor, F. (2022) · Occupational Therapy International · doi:10.1155/2022/9980523 · Cited by 16 · see citing works
“From the perspective of the COSMIN standards for assessing the quality of studies on reliability and measurement error, the BBT is an example of a performance-based outcome measurement instrument (PerFOMs) in which a professional instructs a patient to comply with a specific manual task [30].”
MethodFearn, N., Llanos, C., Dylke, E. S., Stuart, K. E., & Kilbreath, S. L. (2022) · Journal of Cancer Survivorship · doi:10.1007/s11764-022-01278-w · Cited by 16 · see citing works
Lu, J. K., Sijm, M., Janssens, G. E., Goh, J., & Maier, A. B. (2023) · GeroScience · doi:10.1007/s11357-023-00815-4 · Cited by 17 · see citing works
“The user manual of the COSMIN Risk of Bias tool was used to guide the reporting of validation outcomes [12].”
MethodHonvo, G., Sabico, S., Veronese, N., Bruyère, O., Rizzoli, R., Thiyagarajan, J. A., Mikton, C. R., Diaz, T., Cooper, C. C., & Reginster, J. (2023) · Age and Ageing · doi:10.1093/ageing/afad139 · Cited by 16 · see citing works
Development, refinement, and validation of an equine musculoskeletal pain scale
Auer, U., Kelemen, Z., Vogl, C., von Ritgen, S., Haddad, R., Borda, L. T., Gabmaier, C., Breteler, J., & Jenner, F. (2024) · Frontiers in Pain Research · doi:10.3389/fpain.2023.1292299 · Cited by 16 · see citing works
The Long COVID Symptoms and Severity Score: Development, Validation, and Application
Ye, G., Zhu, Y., Bao, W., Zhou, H., Lai, J., Zhang, Y., Xie, J., Ma, Q., Luo, Z., Ma, S., et al. (2024) · Value in Health · doi:10.1016/j.jval.2024.04.009 · Cited by 16 · see citing works
Reproducibility of Microwave Breast Imaging: Analysis of Regular Scans of a Group of Volunteers
Wang, Z., Mojabi, P., Price, S., Lasemiimeni, Z., Besler, B. C., Bourqui, J., Deutscher, D., Besler, B. A., Shen, H., Docktor, B., et al. (2024) · IEEE Transactions on Biomedical Engineering · doi:10.1109/tbme.2024.3512572 · Cited by 16 · see citing works
“The COSMIN Risk of Bias Tool was developed to assess the quality of studies addressing reliability and measurement variability [22], combining elements for an effective research question with 8-9 standards to assess the quality of a study.”
González-Seguel, F., Pinto-Concha, J. J., Ríos-Castro, F., Silva-Gutiérrez, A., Camus-Molina, A., Mayer, K. P., & Parry, S. M. (2021) · Archives of Rehabilitation Research and Clinical Translation · doi:10.1016/j.arrct.2021.100142 · Cited by 16 · see citing works
Egerton, T., Lawford, B. J., Campbell, P. K., Plinsinga, M. L., Spiers, L., Mackenzie, D., Graham, B., Mills, K. A. G., Eyles, J. P., Knox, G., et al. (2021) · JMIR Formative Research · doi:10.2196/32627 · Cited by 16 · see citing works
Reply to the concerns raised by McKenna and Heaney about COSMIN
Mokkink, L. B., Terwee, C. B., de Vet, H. C. W., Bouter, L. M., Alonso, J., & Patrick, D. L. (2021) · Journal of Medical Economics · doi:10.1080/13696998.2021.1948231 · Cited by 16 · see citing works
Self-citationThe accuracy of Apple Watch measurements: a living systematic review and meta-analysis
Lambe, R., Baldwin, M., O’Grady, B., Schumann, M., Caulfield, B., & Doherty, C. (2026) · npj Digital Medicine · doi:10.1038/s41746-025-02238-1 · Cited by 17 · see citing works
Aledda, S., Galeoto, G., Fabbrini, G., Lucibello, L., Tofani, M., Conte, A., & Berardi, A. (2023) · Disability and Rehabilitation Assistive Technology · doi:10.1080/17483107.2022.2161648 · Cited by 15 · see citing works
“The review followed the 27-item Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) checklist [19] and COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) methodology for systematic reviews of patient-reported outcome measures (PROMs) [10].”
MethodInfluentialZhou, E. F. M., Fu, S. N., Huang, C., Huang, X. P., & Wong, A. Y. L. (2023) · BMC Oral Health · doi:10.1186/s12903-023-03558-y · Cited by 15 · see citing works
“The methodological quality of the included studies was rated as “very good, adequate, doubtful, or inadequate” using the “worst-score counts” principle [31, 32].”
BackgroundMethodBudgett, J., Sommerlad, A., Kupeli, N., Zabihi, S., Olsen, A., & Cooper, C. (2023) · Dementia · doi:10.1177/14713012231222309 · Cited by 15 · see citing works
“In this review, we follow the COnsensus-based Standards for the selection of health Measurement Instruments (COSMIN) guidelines (Mokkink et al., 2020), a comprehensive checklist designed to assess the psychometric properties and methodological quality of outcome measures.”
MethodInfluentialZhou, E. F. M., Wong, A. Y. L., Zheng, Y., Lam, K. H. S., & Fu, S. N. (2024) · Ultrasound in Medicine & Biology · doi:10.1016/j.ultrasmedbio.2023.12.021 · Cited by 15 · see citing works
Trul-Kreuze, I. A., Akkerman, M., Kieboom, E. A. M., Nieuwenhuis, M. K., Houdijk, H., & Bongers, B. C. (2024) · Archives of Physical Medicine and Rehabilitation · doi:10.1016/j.apmr.2024.02.717 · Cited by 15 · see citing works
Smith, M. G., Farrar, L. C., Gibson, R. J., Russo, R. N., & Harvey, A. R. (2023) · Developmental Medicine & Child Neurology · doi:10.1111/dmcn.15535 · Cited by 15 · see citing works
Kwok, E. Y. L., Rosenbaum, P., Thomas‐Stonell, N., & Cunningham, B. J. (2021) · International Journal of Language & Communication Disorders · doi:10.1111/1460-6984.12603 · Cited by 14 · see citing works
Skibsted, C. V., Jensen, B. T., Juul, T., & Kristensen, H. Ø. (2022) · Colorectal Disease · doi:10.1111/codi.16202 · Cited by 14 · see citing works
“To determine the rating, the corresponding COSMIN Risk of Bias box was completed, with the lowest rating in the box deciding the overall rating in concordance with the user manual [30].”
MethodCleveland, M. R., Baute, R., Clindaniel, C., Hertz, L., Pond, R., & Centers, G. I. (2023) · Pediatric Critical Care Medicine · doi:10.1097/pcc.0000000000003182 · Cited by 8 · see citing works
“Study procedures were designed following the Consensus-based Standards for the Selection of Health Measurement Instruments risk of bias tool (11) and reported following the Guidelines for Reporting Reliability and Agreement Studies (12).”
MethodTest-retest reliability of joint position sense in the elbow among healthy adults
Rider, J. V., & Valdes, K. A. (2023) · Journal of Hand Therapy · doi:10.1016/j.jht.2023.08.015 · Cited by 15 · see citing works
- Authors
- Mokkink, L. B., Boers, M., van der Vleuten, C. P. M., Bouter, L. M., Alonso, J., Patrick, D. L., de Vet, H. C. W., & Terwee, C. B.
- Affiliations
- Amsterdam Public Health (NL)
- Universitat Pompeu Fabra (ES)
- University of Washington (US)
- Corresponding author
- Mokkink, L. B.
- Venue
- BMC Medical Research Methodology
- Published
- 2020-12
- Volume
- 20
- Issue
- 1
- Pages
- 293-293
- ISSN
- 1471-2288 (ISSN-L)
- PMC
- PMC7712525
- OpenAlex
- W3107903990
- Cited by
- 588
- References
- 31
- Citations by year
- 2026: 106 · 2025: 121 · 2024: 149 · 2023: 101 · 2022: 72 · 2021: 37 · 2020: 2
- FWCI
- 32.32
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- BMC Medical Research Methodology (publishedVersion, cc-by)
- Research Square (acceptedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Research Publications (Maastricht University) (publishedVersion, cc-by)
- VU Research Portal (publishedVersion, other-oa)
- Pure Amsterdam UMC (submittedVersion, other-oa)
- Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Amsterdam UMC (VU Amsterdam) - Institutional Repository (submittedVersion)
- Repositori digital de la UPF (Universitat Pompeu Fabra) (submittedVersion, cc-by)
- Research Publications (Maastricht University) (submittedVersion, other-oa)
- Data Archiving and Networked Services (DANS) (submittedVersion)
- Funders
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (91617098)
- Topics
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Reliability and Agreement in Measurement
- Social Sciences › Sociology and Political Science › Delphi Technique in Research
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
- Keywords
- COSMIN, risk of bias, reliability statistics, measurement error, outcome measurement instruments, clinician-reported outcomes, performance-based outcome measures, laboratory parameters, study quality assessment, Delphi consensus, measurement properties
- MeSH terms
- Delphi Technique, Humans, Reproducibility of Results, Bias, Consensus
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