Newcastle–Ottawa scale

In statistics, the Newcastle–Ottawa scale is a tool used for assessing the quality of non-randomized studies included in a systematic review and/or meta-analyses. Using the tool, each study is judged on eight items, categorized into three groups: the selection of the study groups; the comparability of the groups; and the ascertainment of either the exposure or outcome of interest for case-control or cohort studies respectively. Stars awarded for each quality item serve as a quick visual assessment. Stars are awarded such that the highest quality studies are awarded up to nine stars. The method was developed as a collaboration between the Universities of Newcastle, Australia and Ottawa, Canada using a Delphi process to define variables for data extraction. The scale was then tested on systematic reviews and further refined.[1] Separate tools were developed for cohort and case–control studies. It has also been adapted for prevalence studies.[2]

External links

References

  1. ↑ Deeks JJ, Dinnes J, D'Amico R, Sowden AJ, Sakarovitch C, Song F; et al. (2003). "Evaluating non-randomised intervention studies". Health Technol Assess. 7: 27. doi:10.3310/hta7270.
  2. ↑ Douglas A. Mata, Marco A. Ramos, Narinder Bansal, Rida Khan, Constance Guille, Emanuele Di Angelantonio & Srijan Sen (2015). "Prevalence of Depression and Depressive Symptoms Among Resident Physicians: A Systematic Review and Meta-analysis". JAMA. 314 (22): 2373–2383. doi:10.1001/jama.2015.15845. PMC 4866499Freely accessible. PMID 26647259.


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