Education And Debate Statistics Notes Validating scales and indexes BMJ 2002; 324 doi: https://doi.org/10.1136/bmj.324.7337.606 (Published 09 March 2002) Cite this as: BMJ 2002;324:606 Article Related content Metrics Responses Peer review Related articles Research Methods & Reporting Clinical prediction rules Published: 16 January 2012; BMJ 344 doi:10.1136/bmj.d8312 Research Prospective validation of classification of intraoperative adverse events (ClassIntra): international, multicentre cohort study Published: 25 August 2020; BMJ 370 doi:10.1136/bmj.m2917 See more Population attributable fraction BMJ February 22, 2018, 360 k757; DOI: https://doi.org/10.1136/bmj.k757 Statistics Notes: Percentage differences, symmetry, and natural logarithms BMJ August 16, 2017, 358 j3683; DOI: https://doi.org/10.1136/bmj.j3683 Statistics Notes: What is a percentage difference? BMJ August 16, 2017, 358 j3663; DOI: https://doi.org/10.1136/bmj.j3663 Inverse probability weighting BMJ January 15, 2016, 352 i189; DOI: https://doi.org/10.1136/bmj.i189 Statistics Notes: Bootstrap resampling methods BMJ June 02, 2015, 350 h2622; DOI: https://doi.org/10.1136/bmj.h2622 Cited by... Measuring frailty in younger populations: a rapid review of evidenceAbstract Fulltext PDF Validation analysis of Global Health Security Index (GHSI) scores 2019Abstract Fulltext PDF Clinical prediction rulesAbstract Fulltext PDF Updated Classification System for Proximal Humeral FracturesAbstract Fulltext PDF Is the simple versus complex classification of concussion a valid and useful differentiation?Abstract Fulltext PDF Development of a patient experience questionnaire for primary care mental healthAbstract Fulltext PDF