MRI, General Movements, and Neurological Examination for Early Cerebral Palsy Diagnosis in Preterm Infants
Shipra Jain1,2,3, Karen Harpster3,4,5, Stephanie Merhar1,2,3
1The Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
Insights
Early cerebral palsy (CP) detection in preterm infants using structural brain MRI (sMRI) combined with General Movements Assessment (GMA) or Hammersmith Infant Neurological Examination (HINE) shows high specificity but low sensitivity. Further research is needed for more sensitive diagnostic tools.
Area of Science:
- Neonatal neurology
- Developmental pediatrics
- Neuroimaging
Background:
- Cerebral palsy (CP) diagnosis in preterm infants often relies on early assessments.
- Prognostic data on combined use of structural brain MRI (sMRI), General Movements Assessment (GMA), and Hammersmith Infant Neurological Examination (HINE) for early CP diagnosis, especially for Gross Motor Function Classification System (GMFCS) level I, is limited.
- Accurate early diagnosis is crucial for timely intervention in preterm infants.
Purpose of the Study:
- To evaluate the predictive values of sMRI, GMA, and HINE, individually and in combination, for diagnosing CP in preterm infants before 5 months corrected age (CA).
- To assess the diagnostic accuracy of these methods across different GMFCS levels for CP.
- To identify the most effective combination of tools for early CP detection in this population.
Main Methods:
- Prospective cohort study of 395 preterm infants (≤32 weeks' gestation) from 5 NICUs.
- Primary outcome: CP diagnosis at 22-26 months CA, classified by GMFCS.
- Evaluated abnormal sMRI (motor tract abnormalities) at 39-44 weeks postmenstrual age, and abnormal GMA (absent fidgety movements) or HINE (score < 56) at 12-18 weeks CA, calculating sensitivity, specificity, and predictive values.
Main Results:
- Of 338 infants with complete follow-up, 39 (11.5%) developed CP (28 GMFCS level I, 11 levels II-V).
- Combined sMRI and GMA showed 100% specificity and 22% sensitivity for CP.
- Combined sMRI and HINE showed 98% specificity and 32% sensitivity for CP.
- These combinations achieved 78%-90% sensitivity and 98%-100% specificity for predicting CP levels II-V.
Conclusions:
- Combined sMRI with GMA or HINE in preterm infants demonstrates high specificity but low sensitivity for predicting CP.
- These findings highlight the need for longer developmental follow-up and more sensitive diagnostic tools for early CP detection in preterm infants.
- Further research should focus on improving the sensitivity of early diagnostic markers for CP in this vulnerable population.
Background And Objectives:
Researchers have not yet collected sufficient prognostic data on the combined use of structural brain MRI (sMRI) with General Movements Assessment (GMA) or Hammersmith Infant Neurological Examination (HINE) in children born preterm for diagnosing cerebral palsy (CP) before 5 months corrected age (CA), particularly for Gross Motor Function Classification System (GMFCS) level I CP. We evaluated the predictive values of sMRI, GMA, and HINE individually and in combination for early CP diagnosis and assessed accuracy across varying GMFCS levels in children born preterm.
Methods:
We studied a prospective regional cohort of 395 preterm infants (≤32 weeks' gestation) from 5 NICUs in Greater Cincinnati. The primary outcome was CP diagnosis at 22 to 26 months CA, classified by GMFCS. We calculated sensitivity, specificity, predictive values, and likelihood ratios for CP diagnosis/prediction for an abnormal sMRI (motor tract abnormalities) at 39-44 weeks postmenstrual age and an abnormal GMA (absent fidgety movements) or HINE (score below 56) at 12 to 18 weeks CA.
Results:
Of 338 (86%) children with complete follow-up, 39 (11.5%) developed CP (28 GMFCS level I, 11 levels II-V). Combining sMRI and GMA achieved 100% specificity and 22% sensitivity, while sMRI and HINE exhibited 32% sensitivity, 98% specificity. These 2 combinations achieved higher sensitivity (78%-90%) and specificity (98%-100%) for predicting CP levels II to V.
Conclusions:
In our preterm cohort, sMRI plus GMA/HINE demonstrated high specificity but low sensitivity in predicting CP, underscoring the need for longer developmental follow-up and more sensitive diagnostic tools for early detection of CP in children born preterm.
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