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The mean value and standard error of femoral neck bone mineral density (BMD) (a) and proportion of low BMD (b) in AIS boys and girls. Subjects aged between 10–11 y were divided into the 10 y group,; the same criterion was used for other age groups; * indicates p < 0.05, ** indicates p < 0.01, *** indicates p < 0.001. Student’s t-test was used for (a), and the chi-squared test was used for (b).
