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| Age of Newborn at Initial Screening (days) | |||||||||
| Total | ≤28 (n = 1941) | 29 - 56 (n = 722) | >56 (n = 355) |
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| Variables | Count | % | Count | % | Count | % | Count | % | (X2)b | Sig. |
| Newborn sex |
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| 0.70 | … |
| Female | 1503 | 49.8% | 973 | 50.1% | 350 | 48.5% | 180 | 50.7% |
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| Male | 1515 | 50.2% | 968 | 49.9% | 372 | 51.5% | 175 | 49.3% |
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| Gestational Number |
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| 3.72 | … |
| Singleton | 2940 | 97.4% | 1885 | 97.1% | 704 | 97.5% | 351 | 98.9% |
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| Multiple | 78 | 2.6% | 56 | 2.9% | 18 | 2.5% | 4 | 1.1% |
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| Preterm Birth |
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| 1.15 | … |
| No | 2972 | 98.5% | 1908 | 98.3% | 713 | 98.8% | 351 | 98.9% |
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| Yes | 46 | 1.5% | 33 | 1.7% | 9 | 1.2% | 4 | 1.1% |
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| Physician Background |
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| 133.61 | *** |
| General Pediatric Practitioner | 2795 | 92.6% | 1718 | 88.5% | 722 | 100.0% | 355 | 100.0% |
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| Pediatric Orthopedic Specialist | 223 | 7.4% | 223 | 11.5% | 0 | 0.0% | 0 | 0.0% |
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| Initial Screen Outcome |
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| 126.30 | *** |
| Negative Screened Hips (Ia/Ib) | 2671 | 88.5% | 1639 | 84.4% | 687 | 95.2% | 345 | 97.2% |
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| Negative Ultrasound (Ia/Ib) with CD a | 63 | 2.1% | 34 | 1.8% | 20 | 2.8% | 9 | 2.5% |
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| Positive Ultrasound Hips (IIa/IIb) | 258 | 8.5% | 242 | 12.5% | 15 | 2.1% | 1 | 0.3% |
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| Dysplastic Ultrasound Hips (IIc, III, IV, D) | 26 | 0.9% | 26 | 1.3% | 0 | 0.0% | 0 | 0.0% |
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| Screening Program Outcome |
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| 15.10 | ** |
| Neg. Screened or Neg. Screened f/u | 2970 | 98.4% | 1899 | 97.8% | 718 | 99.4% | 353 | 99.4% |
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| Harness Treatment | 12 | 0.4% | 8 | 0.4% | 2 | 0.3% | 2 | 0.6% |
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| Lost to f/u | 36 | 1.2% | 34 | 1.8% | 2 | 0.3% | 0 | 0.0% |
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