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Construct validity of the Infant Motor Profile: relation with prenatal, perinatal, and neonatal risk factors
Kirsten R Heineman1, Sacha La Bastide-Van Gemert, Vaclav Fidler
1Department of Paediatrics, Institute of Developmental Neurology, University Medical Center Groningen, Groningen, the Netherlands.
Insights
The Infant Motor Profile (IMP) demonstrates construct validity, as its scores correlate with key factors influencing infant neuromotor development, including gestational age and brain health.
Area of Science:
- Pediatrics
- Developmental Neuroscience
- Motor Development
Background:
- The Infant Motor Profile (IMP) is a tool for assessing infant motor behavior between 3 and 18 months.
- Understanding the factors influencing infant motor development is crucial for early identification of potential issues.
Purpose of the Study:
- To investigate the construct validity of the Infant Motor Profile (IMP).
- To examine the relationship between IMP scores and prenatal, perinatal, and neonatal variables.
- To assess the impact of brain pathology, identified via neonatal ultrasound, on IMP scores.
Main Methods:
- A longitudinal prospective study involving 30 term and 59 preterm infants.
- IMP assessments were conducted at corrected ages of 4, 6, 10, 12, and 18 months.
- Data on socio-economic status, perinatal factors, and neonatal brain imaging (for preterm infants) were collected and analyzed using mixed-effects models.
Main Results:
- Gestational age, socio-economic status, and 5-minute Apgar scores significantly influenced IMP scores in the overall infant group.
- In preterm infants, IMP scores were significantly associated with the presence of brain lesions on neonatal ultrasound and socio-economic status.
Conclusions:
- The study supports the construct validity of the Infant Motor Profile (IMP).
- IMP scores are demonstrably linked to crucial determinants of neuromotor function, validating its use in clinical and research settings.
Aim:
The Infant Motor Profile (IMP) is a qualitative assessment of motor behaviour of infants aged 3 to 18 months. The aim of this study was to investigate construct validity of the IMP through the relation of IMP scores with prenatal, perinatal, and neonatal variables, including the presence of brain pathology indicated by neonatal ultrasound imaging of the brain.
Method:
A longitudinal prospective study was performed in a group of 30 term infants (12 females, 18 males; median gestational age 40.1 wks, range 37.6-42 wks) and 59 preterm infants (25 females, 34 males; median gestational age 29.7 wks, range 25-34.7 wks). IMP assessments were performed at (corrected) ages of 4, 6, 10, 12, and 18 months. Socio-economic and perinatal data were collected, which, in the case of preterm infants, included information on periventricular leukomalacia and intraventricular haemorrhage based on neonatal cranial ultrasound. Data were analysed by fitting mixed-effects models.
Results:
Gestational age, socio-economic status, and 5-minute Apgar scores were significant determinants of IMP scores in the total group of infants (p<0.001, <0.002, and <0.042 respectively). In the subgroup of preterm infants, IMP scores were significantly affected by brain lesions on neonatal ultrasound (p<0.001) and by socio-economic status (p=0.001).
Interpretation:
The findings support the construct validity of the IMP: IMP scores are clearly associated with relevant determinants of neuromotor function.
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