PMA mean and range for each USBD score value
| Score | No. of Scans with Score Assigned | PMA (Weeks)(mean) | PMA (Weeks)(range) |
|---|---|---|---|
| 0 | 20 | 25.8 (SD, 1.4) | 23 + 4/7 to 29 + 0/7 |
| 1 | 25 | 26.9 (SD, 1.6) | 23 + 5/7 to 29 + 5/7 |
| 2 | 53 | 28.9 (SD, 1.3) | 25 + 0/7 to 32 + 0/7 |
| 3 | 56 | 30.4 (SD, 1.5) | 27 + 0/7 to 35 + 0/7 |
| 4 | 67 | 32.1 (SD, 1.6) | 27 + 1/7 to 36 + 0/7 |
| 5 | 67 | 34.4 (SD, 1.9) | 30 + 2/7 to 39 + 1/7 |
| 6 | 24 | 36.1 (SD, 1.6) | 33 + 2/7 to 39 + 1/7 |