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

Table 3.

Summary of Mean Astigmatism Slope (D/Y) for the Full, Younger, and Older Cohorts by Amount of Baseline Refractive Astigmatism

Astigmatism Measurement	Baseline Refractive Astigmatism,	Full Dataset		Younger Cohort		Older Cohort
Astigmatism Measurement	D Cyl	Mean Slope	SEM	Mean Slope	SEM	Mean Slope	SEM
Cyl
Refractive	<1.00 D	*0.008*	0.005	*−0.022*	0.006	0.063	0.011
P < 0.001*	1.00 to <3.00 D	*−0.013*	0.009	*−0.044*	0.011	0.072	0.025
P < 0.003†	≥3.00 D	*0.046*	0.014	*0.065*	0.017	0.057	0.033
Keratometric	<1.00 D	*−0.004*	0.005	*−0.039*	0.006	0.044	0.009
P < 0.05*	1.00 to <3.00 D	*−0.006*	0.010	*−0.035*	0.012	0.045	0.020
P < 0.02†	≥3.00 D	*0.030*	0.010	*0.039*	0.013	0.028	0.027
Internal	<1.00 D	0.012	0.006	0.017	0.007	0.019	0.012
NS*	1.00 to <3.00 D	−0.006	0.010	−0.009	0.012	0.027	0.022
NS†	≥3.00 D	0.016	0.011	0.027	0.015	0.029	0.027
J0
Refractive	<1.00 D	0.005	0.002	*−0.009*	0.003	0.031	0.005
P < 0.007*	1.00 to <3.00 D	*−0.005*	0.005	*−0.021*	0.006	0.037	0.014
P < 0.002†	≥3.00 D	*0.019*	0.007	*0.032*	0.009	0.022	0.018
Keratometric	<1.00 D	−0.004	0.002	*−0.022*	0.003	0.021	0.005
P < 0.006*	1.00 to <3.00 D	*−0.016*	0.006	*−0.032*	0.007	0.019	0.010
P < 0.007†	≥3.00 D	*0.010*	0.006	*0.014*	0.008	0.006	0.014
Internal	<1.00 D	0.009	0.003	0.013	0.003	0.009	0.006
NS*	1.00 to <3.00 D	0.011	0.006	0.011	0.007	0.018	0.011
NS†	≥3.00 D	0.009	0.006	0.018	0.008	0.015	0.014
J45
Refractive	<1.00 D	0	0.001	−0.001	0.002	−0.001	0.003
NS*	1.00 to <3.00 D	0.002	0.004	0.002	0.005	−0.016	0.010
NS†	≥3.00 D	0.011	0.010	−0.001	0.014	0.001	0.020
Keratometric	<1.00 D	0.005	0.002	*−0.009*	0.003	0.031	0.005
P < 0.007*	1.00 to <3.00 D	*−0.005*	0.005	*−0.021*	0.006	0.037	0.014
P < 0.002†	≥3.00 D	*0.019*	0.007	*0.032*	0.009	0.022	0.018
Internal	<1.00 D	0.009	0.003	0.005	0.003	0.009	0.005
NS*	1.00 to <3.00 D	0.013	0.004	0.004	0.005	0.008	0.009
NS†	≥3.00 D	0.020	0.005	0.017	0.007	0.018	0.014

Bold italic values indicate significant post hoc comparisons across levels of baseline astigmatism.

For full dataset, P value for main effect of baseline refractive astigmatism Cyl.

^†

For younger and older cohort data, P value for interaction between cohort and baseline refractive astigmatism Cyl.