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. Author manuscript; available in PMC: 2016 Apr 1.
Published in final edited form as: Prenat Diagn. 2015 Feb 12;35(4):400–408. doi: 10.1002/pd.4558

Table 4.

Pearson’s correlation coefficient and regression analysis between biometry and gestational age for linear and quadratic models of growth.

Measure CC Linear
Adj R2 		Linear
RMSE		 Quadratic
Adj R2 		Quadratic
RMSE
BOD (mm) 0.9552 0.9117 1.8767 0.9376 1.5771
IOD (mm) 0.8429 0.7079 1.1634 0.7192 1.1407
OD* (mm) 0.9445 0.8912 0.7329 0.9199 0.6288
Volume* (mL) 0.9680 0.9365 0.1323 0.9360 0.1329

CC, Pearson’s correlation coefficient; Adj R2, adjusted r-squared; RMSE, root mean square error; BOD, binocular distance; IOD, interocular distance; OD, ocular diameter*.

*

Average of left and right measurements.