Level of impairment
| Level of impairment | Physical/medical | Hearing loss | Total IQ | Movement ABC | ||||
| Severe | Cerebral palsy | Bilateral | <50 | |||||
| Uncontrolled seizures | Severe–profound | |||||||
| Blindness | ||||||||
| Moderate | Limb amputation | Unilateral | 50–69 (0.1–2%) | >17 (>98%) | ||||
| Moderate–profound | ||||||||
| Mild | Digital amputation | High frequency | 70–75 (2–5%) | 14–17 (95–98%) | ||||