Which scoring systems are used for diagnosing and classifying cerebral palsy in infants and young children?

Scoring Systems for Cerebral Palsy Diagnosis

The Hammersmith Infant Neurological Examination (HINE) is the single most accurate and strongly recommended scoring system for diagnosing cerebral palsy in infants and young children, with 90% predictive accuracy between 2-24 months of age. 1

Age-Specific Diagnostic Approach

Infants < 5 Months (Corrected Age)

Primary Assessment Tools:

• General Movements (GMs): 95-98% predictive of CP when combined with neuroimaging - this is the most accurate test for this age group 1
• HINE at 3 months: Scores <57 are 96% predictive of CP 1
• Test for Infant Motor Performance (TIMP): Conditional recommendation when GMs unavailable 1
• MRI: 80-90% predictive when showing abnormal neuroanatomy in motor areas 1

Infants 5-24 Months (Corrected Age)

HINE Diagnostic Cutoffs (Strong recommendation):

• Score <73 at 6,9, or 12 months: Indicates high risk of CP 1
• Score <40 at 6,9, or 12 months: Almost always indicates definite CP 1

Supplementary Motor Assessments (Conditional recommendations):

• Developmental Assessment of Young Children (DAYC): 89% predictive of CP - allows parent self-report of motor delay 1
• Alberta Infant Motor Scale (AIMS): 86% predictive of abnormal motor outcome 1
• Neurological Sensory Motor Developmental Assessment (NSMDA): 82% predictive of abnormal motor outcome 1
• Movement Assessment of Infants (MAI): 73% predictive of CP 1

Severity Classification Systems

Motor Severity Prediction in Infants < 2 Years

HINE Severity Cutoffs (at 3,6,9, or 12 months):

• Score 50-73: Likely unilateral CP (95-99% will walk) 1
• Score <50: Likely bilateral CP 1

HINE Severity Cutoffs (at 3-6 months):

• Score 40-60: Likely GMFCS I-II (mild-moderate impairment) 1
• Score <40: Likely GMFCS III-V (severe impairment) 1

MRI Prognostic Indicators:

Nonambulant CP more likely after:

• Bilateral parenchymal hemorrhages (grade IV) 1
• Bilateral cystic periventricular leukomalacia (grade III) 1
• Brain maldevelopment 1
• Basal ganglia injury 1

Ambulant CP more likely after:

• Unilateral lesions (grade IV hemorrhage or perinatal arterial ischemic stroke) 1
• Periventricular leukomalacia (noncystic) 1

Classification Systems for Children ≥ 2 Years

Gross Motor Function Classification System (GMFCS): Most accurate for long-term motor severity prognosis in children older than 2 years 1

Additional Functional Classification Systems (for comprehensive assessment):

• Manual Ability Classification System (MACS): Classifies hand function 2
• Communication Function Classification System (CFCS): Excellent validity for children aged 2-3 years with CP 3, 2
• Eating and Drinking Ability Classification System (EDACS): Assesses feeding abilities 2

Clinical Red Flags Requiring Immediate CP Investigation

Any infant presenting with: 1

• Inability to sit independently by 9 months
• Hand function asymmetry at any age
• Inability to take weight through plantar surface (heel and forefoot) of feet

Critical Implementation Points

Timing Considerations:

• Severity predictions in children <2 years must be made cautiously using standardized tools, as incomplete motor development and abnormal tone can confound clinical observations 1
• Repeated MRI at age 2 years is recommended for infants with initially normal MRI (at 12-18 months) but persistent motor/neurological abnormality 1

Resource-Limited Settings:

When MRI is unavailable or unaffordable, early detection remains possible using HINE combined with standardized motor assessments (DAYC or MAI) between 5-24 months corrected age 1

Mandatory Follow-Up:

Any diagnosis of CP or "high risk of CP" must trigger immediate referral to CP-specific early intervention and screening for associated impairments (vision, hearing, epilepsy) 1