| Parameter | Standard deviation (analyzed group) | Standard deviation (control group) |
| A4 | 2.16 | 1.86 |
| A5 | 4.20 | 5.48 |
| A6 | 7.43 | 11.30 |
| A7 | 4.00 | 4.24 |
| A8 | 2.80 | 2.58 |
| A8 + n | 0.18 | 0.18 |