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Early Motor Repertoire of Very Preterm Infants and Relationships with 2-Year Neurodevelopment
Amanda K-L Kwong1,2,3, Roslyn N Boyd1,4, Mark D Chatfield1,4
1Queensland Cerebral Palsy and Rehabilitation Research Centre, Child Health Research Centre, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4101, Australia.
Insights
The revised Motor Optimality Score (MOS-R) effectively predicts neurodevelopmental outcomes in very preterm infants. This assessment tool shows strong relationships with cerebral palsy and motor/cognitive delays at two years corrected age.
Area of Science:
- Neonatal Neurology
- Developmental Pediatrics
- Neurodevelopmental Assessment
Background:
- Preterm infants (<31 weeks’ gestational age) face significant neurodevelopmental risks.
- Early identification of neurodevelopmental impairments is crucial for timely intervention.
- The Motor Optimality Score, revised (MOS-R) is an extension of the Prechtl General Movements Assessment, offering potential for early prediction.
Purpose of the Study:
- To determine the relationship between the MOS-R and 2-year neurodevelopmental outcomes in very preterm infants.
- To examine the predictive validity of the MOS-R at 3–4 months’ corrected age (CA) for neurodevelopmental outcomes.
- To assess MOS-R's predictive power beyond established perinatal risk factors, including Prechtl fidgety movements.
Main Methods:
- A cohort of 169 infants born very preterm (<31 weeks’ gestational age) was studied.
- The MOS-R was administered at 3–4 months’ corrected age (CA).
- Neurodevelopmental outcomes at 2 years’ CA were assessed using the Bayley Scales of Infant and Toddler Development, Third edition (Bayley-III) and the Neurological, Sensory, Motor, Developmental Assessment (NSMDA). Cerebral palsy (CP) was classified at 2 years.
Main Results:
- The MOS-R demonstrated significant relationships with 2-year neurodevelopmental outcomes, including Bayley-III motor and cognitive scores, and NSMDA scores.
- Each 1-point increase in MOS-R was associated with reduced odds of definite and clinical cerebral palsy.
- A MOS-R score ≤ 23 effectively predicted motor impairment (sensitivity 78%) and neurosensory motor impairment (sensitivity 86%) at 2 years.
Conclusions:
- The MOS-R is strongly associated with cerebral palsy and motor/cognitive delays at 2 years in very preterm infants.
- The MOS-R serves as a valuable predictor of motor and neurosensory motor impairment in this high-risk population.
- The MOS-R provides a reliable tool for early neurodevelopmental assessment in very preterm infants.
Abstract:
The Motor Optimality Score, revised (MOS-R) is an extension of the Prechtl General Movements Assessment. This study aims to determine the relationship between MOS-R and 2-year neurodevelopmental outcomes in a cohort of 169 infants born very preterm (<31 weeks’ gestational age), and to examine the predictive validity of the MOS-R at 3−4 months’ corrected age (CA) above perinatal variables associated with poor outcomes, including Prechtl fidgety movements. Development at 2 years’ CA was assessed using Bayley Scales of Infant and Toddler Development, Third edition (Bayley-III) (motor/cognitive impairment: Bayley-III ≤ 85) and Neurological, Sensory, Motor, Developmental Assessment (NSMDA) (neurosensory motor impairment: NSMDA ≥ 12). Cerebral palsy (CP) was classified at 2 years as definite or clinical. The MOS-R was related to 2-year outcomes: Bayley-III motor (BMOS-R = 1.24 95% confidence interval (0.78, 1.70)), cognitive (BMOS-R = 0.91 (0.48, 1.35)), NSMDA scores (BMOS-R = −0.34 (−0.42, −0.25)), definite CP (odds ratio [OR] 0.67 (0.53, 0.86)), clinical CP (OR 0.74 (0.66, 0.83)) for each 1-point increase in MOS-R. MOS-R ≤ 23 predicted motor (sensitivity 78% (60−91%); specificity 63% (54−72%)) and neurosensory motor impairment (sensitivity 86% (64−97%); specificity 59% (51−68%)). The MOS-R is strongly related to CP and motor and cognitive delay at 2 years and is a good predictor of motor and neurosensory motor impairment.
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