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  • Title: Structural spinal abnormalities on MRI and associations with weight status in a general pediatric population.
    Author: van den Heuvel MM, Oei EHG, Renkens JJM, Bierma-Zeinstra SMA, van Middelkoop M.
    Journal: Spine J; 2021 Mar; 21(3):465-476. PubMed ID: 33045416.
    Abstract:
    BACKGROUND CONTEXT: Several spinal abnormalities have been studied using magnetic resonance imaging (MRI). However, in children these studies were sparsely performed in general populations. Examining young children's spines is important since the shape of the bone is largely determined during the growth spurt. Furthermore, it is so far unknown if associations between weight status and spinal abnormalities, which are known for adolescents and adults, are already present in young children. PURPOSE: We aimed to present the prevalence of structural abnormalities in the prepubertal pediatric spine on MRI and their association with measures of the children's body weight and body composition. STUDY DESIGN: Cross-sectional study embedded in a prospective population-based birth cohort study. PATIENT SAMPLE: For this study, participants from the Generation R Study were selected based on the availability of MRI data of the lumbar spine and accelerometry data at the age of 9 years. OUTCOME MEASURES: The presence of structural abnormalities of intervertebral discs and vertebrae was scored on MRI. The body mass index-standard deviation [BMI-SD] score was calculated from objectively measured weight and height, and body composition measurements were obtained by a dual-energy X-ray absorptiometry scan. METHODS: A semiquantitative scoring tool to assess the intervertebral discs and vertebrae of the lumbar spine on conventional MRI was designed for this purpose. Proportions of children with spinal abnormalities on at least one lumbar vertebral level were presented. Logistic regression was used to analyze associations between abnormalities and weight and body composition. We declare not to have any financial conflicts of interests. RESULTS: We included 559 children (median age of 9.88 years (interquartile range 6.74-10.02), 48.5% boys). Most frequently observed abnormalities of the intervertebral discs were abnormal signal intensity (24.9%), decreased or collapsed disc height (37.6%), disc bulging (73.3%), and abnormal nuclear shape (29.1%). Vertebral endplate irregularities and lumbosacral transitional vertebrae were seen in respectively 40% and 9.3% of the participants. Except for disc bulging, all abnormalities were predominantly present at the L5 level. Only the presence of endplate irregularities was associated with a higher body weight (BMI SD score (odds ratio [OR] 1.50 [95% confidence interval [CI] 1.21-1.86]) and BMI SD change (OR 1.48 [95% CI 1.07-2.03])) and increased body mass values in body composition measurements (% body fat (OR 1.05 [95% CI 1.02-1.09), fat mass index (OR 1.23 [95% CI 1.09-1.39]), and fat-free mass index (OR 1.30 [95% CI 1.06-1.59])) in adjusted analyses. CONCLUSIONS: Structural spinal abnormalities, especially disc bulging, endplate irregularities, and an abnormal disc height, are already present in children aged 9 years from a Dutch population-based cohort. Of those abnormalities, endplate irregularities are associated with various weight and body composition measurements.
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