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Table 6 Correlation coefficient and regression equation

From: Cephalometric study to test the reliability of anteroposterior skeletal discrepancy indicators using the twin block appliance

Parameter r r 2 Equation Standard error of the estimate
ANB angle 0.74 0.55 Y = 0.702*X − 1.645 0.95
Wits appraisal 0.33 0.11 Y = 0.291*X − 0.696 1.78
β angle 0.50 0.25 Y = 0.478*X + 18.549 2.68
APDI 0.47 0.22 Y = 0.482*X + 44.140 3.33
App-Bpp 0.66 0.43 Y = 0.513*X + 1.375 1.67
YEN angle 0.86 0.74 Y = 0.940*X + 11.697 2.70
W angle 0.81 0.65 Y = 0.801*X + 14.059 2.03
  1. r, the multiple correlation coefficient; r 2, the coefficient of determination, is the squared value of the multiple correlation coefficient.