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Spinal curvatures of children and adolescents – a cross-sectional study

Summary Study aim: The aim was to assess the spinal curvatures of primary and lower secondary male and female students from Silesia and to identify individual variations that can determine spinal posture. Material and methods: The study involved 331 girls and 286 boys aged 8 to 16 years. Eligible criteria were non-participation in any professional sport training, and participation in mandatory physical education classes. Posture was evaluated using the moiré method. Measurements of somatic parameters were made with a medical scale using a height meter and a Tanita electronic balance. Results: Dimorphic postural differences of boys and girls were seen mainly in the shape of lumbar lordosis. Girls were more lordotic than boys at all ages except 10-years-olds. Angle γ was significantly greater in 9-, 15- and 16-year-old girls than boys. LLA was significantly more prominent in 15- and 16-year-old girls than boys. Thoracic kyphosis was significantly more prominent in 8- and 11-year-old boys than girls. We also found a significant effect of age and somatic parameters. In boys mean lumbar lordosis was more pronounced in 10-year-olds. In girls fat mass, fat percentage and BMI correlated with angle α and angle Δ. In boys body height and mass, fat mass, total body water and BMI correlated with angles β, γ, Δ, and lordosis lumbar angle. Conclusions: The shape of lumbar lordosis is associated with age and gender. Lumbar lordosis decreases with age in male children and adolescents. Our study revealed poor correlations between sagittal spinal curvatures and somatic parameters.