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Table 5 The mean difference (in mm) between the predicted values of the sum of the permanent canines and the first and second premolars (345) of Ugandan subjects and those predicted from Tanaka and Johnston equation (0.5 Sum of lower incisor widths plus 11 for the upper 345 or 0.5 the sum of the lower incisor widths plus 10.5 for the lower 345) [14] for the same subjects

From: Prediction of width of un-erupted incisors, canines and premolars in a Ugandan population: A cross sectional study

Sex

Arch

Mean difference

Standard deviation

95% Confidence interval of the difference

Total

Maxillary canine and premolars

0.75*

0.11

0.66 - 0.81

 

Mandibular canine and premolars

−0.70*

0.25

−0.86 - -0.53

Boys

Maxillary canine and premolars

−0.85*

0.10

−0.91 - -0.78

 

Mandibular canine and premolars

−0.53*

0.22

−0.67 - -0.38

Girls

Maxillary canine and premolars

−0.98*

0.12

−1.06 - -0.90

 

Mandibular canine and premolars

−0.80*

0.33

−1.02 - -0.59

  1. *P-value <0.05.