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. Author manuscript; available in PMC: 2019 Aug 1.
Published in final edited form as: Bone Joint J. 2018 Aug;100-B(8):1106–1111. doi: 10.1302/0301-620X.100B8.BJJ-2017-1489.R1

Table IV.

Comparison between predicted versus true age at 90% of final height

Chron. age
+ gender		 G&P + gender CPV + chron.
age + gender		 G&P + chron.
age + gender		 G&P + chron. age
+ gender + CPV
Mean discrepancy from true age at 90% of final height, yrs (SD) 0.53 (0.40) 0.51 (0.43) 0.48 (0.37) 0.43 (0.33) 0.33 (0.23)
p-value compared with CPV + gender + chron. age* < 0.001 0.72 N/A 0.04 < 0.001
ANOVA < 0.001 0.96 N/A 0.38 < 0.001
% of radiographs > 1 yr off 13% 12% 10% 7% 1%
R2 0.879 0.878 0.900 0.919 0.924

chron., chronological; G&P, Greulich and Pyle bone age; CPV, central peak value; ANOVA, anaylsis of variance