Correlation of level of hypomethylation of the imprinting control region (ICR) 1 with clinical severity
| Clinical variable | Correlation coefficient | p Value |
| Clinical score† | −0.12 | 0.53 |
| Birth weight* | 0.16 | 0.41 |
| Postnatal height* | 0.15 | 0.42 |
| Feeding difficulties† | −0.34 | 0.07 |
| Congenital abnormality‡ | ND | 0.35 |
| Asymmetry‡ | ND | 0.71 |
| Global developmental delay‡ | ND | 0.37 |
Analysis using Pearson correlation (*), Spearman's rank correlation (†) or unpaired t test (‡).
ND, not determined.