Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 2 Levels of evidence grouped into high (level I and II) and low (level III, IV and V) by year of publication
From: Hip surgery and its evidence base: progress over a decade?
Year | P value | ||
|---|---|---|---|
2000 | 2010 | ||
Level of evidence | |||
High | 22 (12 %) | 107 (31 %) | <0.001 |
Low | 161 (88 %) | 241 (69 %) | |
Total | N = 183 | N = 348 | |