Table I.
Demographic data and results of neuropsychological tests
| P‐value | |||
|---|---|---|---|
| PWS Mean (SD) | Control Mean (SD) | P‐value | |
| Age (years) | 25.4 (4.1) | 23.7 (3.2) | 0.205 |
| Sex (female : male) | 6 : 6 | 7 : 6 | |
| Body mass index | 33.9 (8.8) | 20.1 (1.7) | <0.0001 |
| PWS clinical criteria score | 11.3 (0.8) | NA | (Cut‐off score: 7) |
| Neuropsychological test | |||
| RCPM | 20.4 (5.2) | NA | |
| MMSE (of 30) | *19.2 (5.3) | 29.9 (0.3) | <0.0001 |
| Digit span: forward | 3.8 (0.8) | 6.8 (0.9) | <0.0001 |
| Digit span: backward | 2.5 (0.8) | 5.9 (1.2) | <0.0001 |
| FAB (of 18) | 11.3 (3.8) | 17.0 (0.7) | <0.0001 |
| Category fluency (animal) | 11.6 (3.1) | 19.6 (3.7) | <0.0001 |
| Literal fluency ('fu', 'a', 'ni') | 12.9 (5.0) | 26.0 (8.3) | <0.0001 |
*
One PWS subject was not assessed (n = 11).
PWS, Prader‐Willi syndrome; RCPM, Raven's Colored Progressive Matrices; MMSE, Mini‐Mental State Examination; FAB, Frontal Assessment Battery; NA, not assessed.