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. 2020 Apr 18;33(7):702–706. doi: 10.1016/j.sdentj.2020.04.006

Table 1.

Comparison between upper and lower third molars in term of age prediction based on Pulp-to-Tooth Ratio taken at cervix.

Upper third molars Lower third molars P-value
Number of subjects 135 155 –
Age range (years) 18–63 18–58 –
Mean age ± SD (years) 34.4 ± 11.2 28.2 ± 10.0 0.00a
Correlation coefficient −0.516 −0.361 0.05a
a

Statistically significant at the 0.05 provability level (2-tailed).