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KMID : 1100920230440050249
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Korean Journal of Family Medicine
2023 Volume.44 No. 5 p.249 ~ p.260
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RoBANS 2: A Revised Risk of Bias Assessment Tool for Nonrandomized Studies of Interventions
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Seo Hyun-Ju
Kim Soo-Young
Lee Yoon-Jae
Park Ji-Eun
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Abstract
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Assessment of the risk of bias is an essential component of any systematic review. This is true for both nonrandom-ized studies and randomized trials, which are the main study designs of systematic reviews. The Risk of Bias Assess-ment Tool for Nonrandomized Studies (RoBANS) was developed in 2013 and has gained wide usage as a risk-of-bi-as assessment tool for nonrandomized studies. Four risk-of-bias assessment experts revised it by reviewing existing assessment tools and user surveys. The main modifications included additional domains of selection and detection bias susceptible to nonrandomized studies of interventions, a more detailed consideration of the comparability of participants, and more reliable and valid outcome measurements. A psychometric assessment of the revised Ro-BANS (RoBANS 2) revealed acceptable inter-rater reliability (weighted kappa, 0.25 to 0.49) and construct validity in which intervention effects of studies with an unclear or high risk of bias were overestimated. The RoBANS 2 has ac-ceptable feasibility, fair-to-moderate reliability, and construct validity. It provides a comprehensive framework for allowing authors to assess and understand the plausible risk of bias in nonrandomized studies of interventions.
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KEYWORD
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Systematic Review, Risk Assessment, Bias, Nonrandomized Studies
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