|
|
| Evidence-based guidelines |
|
| Hierarchy of Studies:Evidence-based value |
|
|
|
|
|
|
|
|
|
|
|
| n | Level 4 - Randomized,
non-controlled, |
||||||||
| studies |
|||||||||
| – | Surveys with
random sampling (e.g., |
||||||||
| census) |
|||||||||
| – | Cross-sectional
studies with careful |
||||||||
| random selection
and clear exclusion rules |
|||||||||
| 28 |