Table 1: The efficacy of the treatments at 4 and 8 weeks.
| PEG | Lactulose | p-value | ||||
| 4w | 8w | 4w | 8w | 4w | 8w | |
| Number of defecation/week (n ± SD) | 3.23 ± 0.5 | 3.76 ± 0.6 | 3.46 ± 0.7 | 4.40 ± 0.7 | 0.001 | 0.03 |
| Hard stool (%) | 19% | 0% | 45.4% | 4.5% | 0.06 | 0.3 |
| Painful defecation (%) | 42.9% | 15% | 63.6% | 9.1% | 0.1 | 0.5 |
| Improvement in encopresis (%) | 0% | 0% | 0% | 0% | --- | --- |