Anjo J W M Janssen1, Rob A B Oostendorp2, Reinier P Akkermans3, Katerina Steiner4, Louis A A Kollée5, Maria W G Nijhuis-van der Sanden6. 1. Radboud University Medical Center, Amalia Children's Hospital, Department of Rehabilitation, Pediatric Physical Therapy, Nijmegen, The Netherlands. Electronic address: anjo.janssen@radboudumc.nl. 2. Radboud University Medical Center, Radboud Institute for Health Sciences, Scientific Institute for Quality of Healthcare, Nijmegen, The Netherlands. Electronic address: rob.oostendorp@planet.nl. 3. Radboud University Medical Center, Radboud Institute for Health Sciences, Scientific Institute for Quality of Healthcare, Nijmegen, The Netherlands. Electronic address: reinier.akkermans@radboudumc.nl. 4. Radboud University Medical Center, Amalia Children's Hospital, Department of Pediatrics, Nijmegen, The Netherlands. Electronic address: Katerina.steiner@radboudumc.nl. 5. Radboud University Medical Center, Amalia Children's Hospital, Department of Pediatrics, Nijmegen, The Netherlands. Electronic address: l.a.a.kollee@glazenkamp.net. 6. Radboud University Medical Center, Amalia Children's Hospital, Department of Rehabilitation, Pediatric Physical Therapy, Nijmegen, The Netherlands; Radboud University Medical Center, Radboud Institute for Health Sciences, Scientific Institute for Quality of Healthcare, Nijmegen, The Netherlands. Electronic address: Ria.Nijhuis-vanderSanden@radboudumc.nl.
Abstract
AIM: To determine longitudinal motor performance in very preterm (VPT) infants from 6 months to 5 years of age for the entire cohort of infants, according to gender and gestational age and at the individual level. METHOD: Single-center, prospective longitudinal study of 201 VPT infants (106 boys) without severe impairments. OUTCOMES: Motor performance was assessed with the Bayley Scales of Infant Development (BSID-II-MS: 6, 12, 24 months) and the Movement Assessment Battery for Children (MABC-2-NL: 5 years). RESULTS: At 6, 12, and 24 months and then at 5 years, 77%, 80%, 48%, and 22% of the infants, respectively, showed delayed motor performance (<-1SD). At 5 years, girls performed significantly better than boys in manual dexterity and balance. MIXED MODEL ANALYSES: that examined interactions between time and gender and time and gestational age, revealed no significant interactions. The variance at child level was 29%. Linear mixed model analysis revealed that mean z-scores of -1.46 at 6 months of age declined significantly to -0.52 at 5 years. Individual longitudinal motor performance showed high variability. IMPLICATIONS: Longitudinal motor performance improved almost 1 SD over five years. However, the variability of individual longitudinal motor performance hampers evaluation in clinical care and research.
AIM: To determine longitudinal motor performance in very preterm (VPT) infants from 6 months to 5 years of age for the entire cohort of infants, according to gender and gestational age and at the individual level. METHOD: Single-center, prospective longitudinal study of 201 VPT infants (106 boys) without severe impairments. OUTCOMES: Motor performance was assessed with the Bayley Scales of Infant Development (BSID-II-MS: 6, 12, 24 months) and the Movement Assessment Battery for Children (MABC-2-NL: 5 years). RESULTS: At 6, 12, and 24 months and then at 5 years, 77%, 80%, 48%, and 22% of the infants, respectively, showed delayed motor performance (<-1SD). At 5 years, girls performed significantly better than boys in manual dexterity and balance. MIXED MODEL ANALYSES: that examined interactions between time and gender and time and gestational age, revealed no significant interactions. The variance at child level was 29%. Linear mixed model analysis revealed that mean z-scores of -1.46 at 6 months of age declined significantly to -0.52 at 5 years. Individual longitudinal motor performance showed high variability. IMPLICATIONS: Longitudinal motor performance improved almost 1 SD over five years. However, the variability of individual longitudinal motor performance hampers evaluation in clinical care and research.
Authors: Lieke M A Dekkers; Anjo J W M Janssen; A Rogier T Donders; Maria W G Nijhuis-van der Sanden; Bert J M de Swart Journal: Phys Ther Date: 2020-02-07
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