Summary of early diagnosis of DDH in six representative periods
| Category | X-rays examination* (1979) | 1st year of US examination* (1985) | General US screening** (1989) | Selective US screening*** (1990) | US outpatient clinic*** (1992–2002) | US outpatient clinic*** (2013–2014) |
|---|---|---|---|---|---|---|
| Hips | 606 | 2,370 | 2,000 | 2,664 | 43,418 | 5,598 |
| < 2 Weeks of age | 14.5% | 11.8% | 100.0% | 61.1% | 21.5% | 9.7% |
| 3–8 Weeks of age | 14.5% | 35.6% | - | 11.1% | 52.9% | 43.0% |
| > 8 Weeks of age | 70.9% | 52.6% | - | 27.7% | 25.5% | 47.3% |
* Data from Olgahospital Stuttgart, Germany; ** study performed at Orthopedic Department of Tübingen University, Germany; *** study performed at San Raffaele Hospital, Milan, Italy. -: no data