Attributes . | EMRs . | Public surveys and registries . | RCTs . | Retrospectively aggregated data sets . | Prospectively integrated data systems . |
---|---|---|---|---|---|
Representative | ++ | +++ | + | ++ | +++ |
Consistent | + | +++ | +++ | ++ | +++ |
Accurate | + | + | +++ | + | +++ |
Comprehensive | +++ | + | + | + | +++ |
Up-to-date | +++ | + | +++ | + | +++ |
Attributes . | EMRs . | Public surveys and registries . | RCTs . | Retrospectively aggregated data sets . | Prospectively integrated data systems . |
---|---|---|---|---|---|
Representative | ++ | +++ | + | ++ | +++ |
Consistent | + | +++ | +++ | ++ | +++ |
Accurate | + | + | +++ | + | +++ |
Comprehensive | +++ | + | + | + | +++ |
Up-to-date | +++ | + | +++ | + | +++ |
+, ++, or +++ refer to the relative strength of each attribute, with +++ denoting the strongest. EMRs, electronic medical records; RCTs, randomized controlled trials.