Percentage risk of a hip having a problem between the ages of 4 and 5 years when the migration percentage at 30 months (corrected for gestational age) is in the range shown in the left hand column. Risks are shown separately for side and sex
| Migration percentage at 30 months | Boys | Girls |
|---|---|---|
| Right hips | ||
| < 7 | 0 | 0 |
| 7–14 | 5 | 14 |
| 15–27 | 43 | 27 |
| 28–32 | 75 | 86 |
| > 32 | 100 | 100 |
| Left hips | ||
| < 6 | 0 | 0 |
| 6–15 | 4 | 0 |
| 16–32 | 54 | 31 |
| > 32 | 100 | 80 |