. 2015 Jan 9;56(1):190–198. doi: 10.1167/iovs.14-13898

Table 5.

Regression Coefficients for Prediction of Baseline Refractive Astigmatism (Dependent Variable) From Baseline Keratometric Astigmatism (Independent Variable)

Dataset	Dependent Variable: Refractive Astigmatism	All Subjects			Subjects With Baseline Refractive J0 ≥ 0.50
Dataset	Dependent Variable: Refractive Astigmatism	Constant	Slope	r²	Constant	Slope	r²
Full	J0	−0.343	+1.036	0.847	−0.244	*+1.037*	0.814
Full	J45	+0.043	+0.676	0.578	+0.098	+0.842	0.744
Younger cohort	J0	−0.329	*+1.021*	0.841	−0.220	*+1.011*	0.807
Younger cohort	J45	+0.034	+0.678	0.595	+0.084	+0.826	0.753
Older cohort	J0	−0.416	+1.085	0.884	−0.259	*+1.056*	0.813
Older cohort	J45	+0.082	+0.714	0.553	+0.197	*+0.953*	0.788

Bold italic values indicate slopes that are not significantly different from 1 (P > 0.05).