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Table 4 The gender-wise frequency distribution and the descriptive statistics of variables in the study sample (N=145)

From: Does the crypt: tooth ratio in the developing tooth correlate with chronological age in children?—a novel, radiographic, cross-sectional pilot study using ImageJ tools

Group Boys (n=72) Girls (n=73) Correlation coefficient
n % Age (years) CTR Correlation coefficient n % Age (years) CTR
Mean SD Mean SD r Sig*. Mean SD Mean SD r Sig*.
I 20 27.8 5.74 0.84 2.881 0.51 −0.747 0.000 18 24.7 5.63 0.75 2.969 0.70 −0.710 0.001
II 18 25 8.52 0.73 2.00 0.16 −0.682 0.002 20 27.4 8.71 0.94 1.882 0.20 −0.644 0.002
III 19 26.4 11.53 0.85 1.550 0.20 −0.533 0.019 18 24.7 11.37 0.79 1.519 0.11 −0.798 0.000
IV 15 20.8 13.99 0.59 1.244 0.20 −0.747 0.001 17 23.3 13.87 0.63 1.154 0.14 −0.851 0.000
Total 72 100 9.68 3.17 1.97 0.69 −0.916 0.000 73 100 9.81 3.13 1.892 0.77 −0.886 0.000
  1. *Significant at P<0.05. CTR crypt to tooth area ratio, SD standard deviation