From: Standardizing haematopoietic cell transplants in China
Code | Quality of evidence | Definition |
---|---|---|
A | High | Further research is very unlikely to change our confidence in the estimate of effect. • Several high-quality studies with consistent results • In special cases: one large, high-quality multi-centre trial |
B | Moderate | Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate. • One high-quality study • Several studies with some limitations |
C | Low | Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate. • One or more studies with severe limitations |
D | Very low | Any estimate of effect is very uncertain. • Expert opinion • No direct research evidence • One or more studies with very severe limitations |