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Determination of TUG test: (A) Comparison of TUG test between patients with vitamin D sufficiency and insufficiency. p-value was analyzed using the Mann–Whitney U test. (B) Comparison of TUG test between patients, classified by ODI score. p-value was calculated with Friedman’s two-way ANOVA test. (C) Correlation between serum 25(OH)D and the time in the TUG test.
