Open Access
Table 4.
Characteristics of collaborative global orthopaedic studies from 2004 to 2014.
| Variables | Study characteristics (n = 138) |
|---|---|
| Region of collaborating site by WHO classification | |
| Sub-Saharan Africa (n [%]) | 4 [2.9%] |
| North America (n [%]) | 59 [42.8%] |
| East Asia and Pacific (n [%]) | 10 [7.2%] |
| Europe and Central Asia (n [%]) | 60 [43.5%] |
| Middle East and North Africa (n [%]) | 6 [4.3%] |
| Latin America and Caribbean (n [%]) | 15 [10.9%] |
| South Asia (n [%]) | 0 [0%] |
| Quality of collaborative studies | |
| Level 1 and 2 studies (n [%]) | 28 (20.3%) |
| Level 3, 4, 5 studies (n [%]) | 57 (41.3%) |
| No Level of Evidence (n [%]) | 53 (38.4%) |
| Controls (n [%]) | 41 [29.7%] |
| Prospective (n [%]) | 48 (34.8%) |
| Randomized (n [%]) | 1 (0.7%) |
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