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Table 2 The results of the tests for the reliability of the variable, CTR (N=20)

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

Variable n Mean value SD Mean diff. SD Dahlberg’s formula value Paired t test (p value)* ICC
CTR (1st attempt) 20 2.178 0.922 0.045 0.312 0.21 0.523 0.935
CTR (2nd attempt) 2.133 0.803
  1. *Significant at p<0.05; CTR crypt to tooth ratio, SD standard deviation, ICC intraclass correlation coefficient