Choa Scale
Children's Healthcare of Atlanta - Plagiocephaly Severity Scale
The Children's Healthcare of Atlanta Plagiocephaly severity scale was developed to help categorize the varying degree of cranial asymmetries and guide practitioners in making an appropriate treatment recommendation. The CHOA scale is accepted nation wide by practitioners and insurance companies as the standard of care.
Hajnis, Proportional Deformity Severity Scale
The study published by Hajnis, 1973 is the standard scale for determining the need of helmet treatment in children with proportional deformities such as brachycephaly and scaphocephaly.
| Sex | Age | -2SD | -1SD | Mean | +1SD | +2SD |
| Boys | 16 days to 6 months 6-12 months |
63.7% 64.8% |
68.7% 71.4% |
73.7% 78.0% |
78.7% 84.6% |
83.7% 91.2% |
| Girls | 16 days to 6 months 6-12 months |
63.9% 69.5% |
68.6% 74.0% |
73.3% 78.5% |
78.0% 83.0% |
82.7% 87.5% |
