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Demographic details of groups studied
| Control | DDH | PPA | |
| Number | 101 | 45 | 20 |
| Age – Mean (range) | 42.6 (19–60) | 46.1 (22–69) | 47.5 (28–65) |
| Age at presentation – Mean (range) | NA | 14.5 (0–48) | 22.05 (5–46) |
| Gender | 47 M/54 F | 4 M/41 F | 3 M/17 F |
| Positive Family History | NA | 3 | 0 |
NA = not applicable
