Evidence levelRationale
HighFurther research is very unlikely to change our confidence in the estimate of effect
ModerateFurther research is likely to have an important impact on our confidence in the effect
LowFurther research is very likely to have an estimate of effect and is likely to change the estimate
Very lowAny estimate of effect is very uncertain

From: 1, Background and process

Cover of WHO Policy on Collaborative TB/HIV Activities
WHO Policy on Collaborative TB/HIV Activities: Guidelines for National Programmes and Other Stakeholders.
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