Review Article
A Comparison of the Effectiveness of Surgical and Nonsurgical Treatment of Legg-Calve-Perthes Disease: A Review of the Literature
Table 2
The results of quality assessment of methodology of various research studies (total number of studies was 50).
| | Treatment approaches | Reporting (total score 10) | External validity (total score 3) | Internal validity, bias (total score 7) | Internal validity, confounding (total score 7) |
| | Containment methods | 9 (7–10) | 3 | 4 (3–6) | 5 (4–6) | | Noncontainment methods | 8 (7–10) | 3 | 4 (3–6) | 6 (5–7) | | Nontreatment | 9 (8–10) | 3 | 4 (3–6) | 5 (4–7) | | Surgery methods | 9 (8–10) | 3 | 4 (3–6) | 5 (4–7) |
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