SYRCLE’s risk of bias tool
SYRCLE’s risk of bias tool is used to assess the methodological quality of animal intervention studies. It helps researchers evaluate how well these studies are designed and conducted, to improve the reliability of their results and their relevance for human clinical research.
At a glance
Use when
Conducting systematic reviews of animal intervention studies; evaluating the internal validity of preclinical evidence; supporting translation from animal research to clinical trials.
Avoid when
Assessing human clinical trials (use Cochrane RoB instead); when no animal intervention study details are available; when only qualitative or mechanistic insights (not comparative effectiveness) are needed.
Inputs
Full text or study protocol of an animal intervention study, including details on study design, randomization, blinding, outcome assessment, and reporting.
Outputs
Risk of bias judgment for each of the 10 domains (e.g., low, high, or unclear risk), with supporting rationale based on signalling questions.
How it works
SYRCLE’s RoB tool is an adaptation of the Cochrane Risk of Bias tool, tailored specifically for animal intervention studies. It includes 10 domains covering selection bias, performance bias, detection bias, attrition bias, reporting bias, and other biases. Each domain is supported by signalling questions to guide assessment. Half of the domains align with the Cochrane RoB tool, with modifications reflecting key differences in study design between randomized clinical trials and animal studies.
- HTA domains
- Clinical Effectiveness, Safety
- Categories
- Data Quality Assessment
- Assumptions
- The tool assumes that key methodological features (e.g., randomization, blinding) are applicable and reportable in animal studies, and that poor reporting reflects higher risk of bias. It also assumes that animal study design can meaningfully inform clinical translation.
- Strengths
- Tailored to the specific design features of animal intervention studies; based on established Cochrane methodology; improves transparency and consistency in risk of bias assessment; includes clear signalling questions to guide judgments.
- Limitations
- May be difficult to apply when animal studies are poorly reported; some domains may be challenging to interpret without expertise in preclinical research; not all biases relevant to animal models (e.g., environmental factors) are explicitly covered.
- Also known as
- SYRCLE's RoB tool, Systematic Review Centre for Laboratory Animal Experimentation risk of bias tool
Questions this answers
- › How is randomization performed in the animal study?
- › Was allocation concealment used during the assignment of animals to groups?
- › Were outcome assessors blinded to the intervention received?
- › Were all animals accounted for in the results (e.g., losses during follow-up)?
- › Are all expected outcomes reported, or is there evidence of selective reporting?
- › Were baseline characteristics of animals similar across groups?
References & sources
Related methods
Similar by meaning
Beta record. Generated from the primary source via AI extraction and independent audit, pending final human review.