Fig. 1

The absolute difference in tooth irregularity relationship with VitDBP groups. We found that VitDBP in the log scale was between 2.75 and 6.48 ng/ml for the "normal" range group (middle two quartiles), ≤ 2.69 ng/ml for the low subgroup (first quartile), and between 6.59 and 8.42 ng/ml for the high subgroup (fourth quartile). Our analysis demonstrated that the normal range group (mean = 2.36 ± 0.28) had a significantly higher mean absolute difference in irregularity (p = 0.002) than the "low" or "high" groups (mean = 1.22 ± 0.31)