| QT | Child Score | Total | P-value | ||
| A | B | C | |||
| Normal | 21 (95.5%) | 53 (76.8%) | 51 (68%) | 125 | <0.05 |
| Prolonged | 1 (4.5%) | 16 (23.2%) | 24 (32.0%) | 41 | |
| Total | 22 | 69 | 75 | 166 | |