| AFI | Confirmed group | Suspected group | Control group | One way ANOVA | |
| No. 25 | No. 25 | No. 20 | F | P-value | |
| Mean | 5.8 cm | 8.5 cm | 13.03 cm | 234.632 | <0.0001 |
| SD | ±1.22 | ±2.36 | ±2.01 | ||