| 
 
   |  | Mental Retardation | Autistic disorder | Downs syndrome n (%) | Cerebral palsy | Others |  
   | n (%) | n (%) | n (%) | n (%) |  
   | Dolicocephalic    (<74.9) | 9 (5.3) | 0 | 3 (10) | 2 (13.3) | 0 |  
   | Mesocephalic (75-79.9) | 112 (66.7) | 7 (29.3) | 0 | 9 (60) | 4 (19) |  
   | Brachycephalic (80-84.9) | 40 (23.8) | 12 (50) | 18 (60) | 4 (26.7) | 6 (28.6) |  
   | Hyperbrachycephalic    (85-89.9) | 7 (4.2) | 5 (20.7) | 9 (30) | 0 | 11 (52.4) |  |