Table 3.

Results of multivariable regression models—dependent variable: choroidal thickness

Model∗	Coefficient estimate	P-value	95% confidence interval
Dependent variable: choroidal thickness subfoveal central
Alzheimer's group	−80.810	<.001	−99.528	−66.091
Age (years)	−16.963	.045	−33.559	−0.368
Dependent variable: choroidal thickness 500 μm temporal of the fovea
Alzheimer's group	−75.582	<.001	−93.485	−57.680
Age (years)	−18.000	.026	−33.872	−2.127
Dependent variable: choroidal thickness 1000 μm temporal of the fovea
Alzheimer's group	−68.118	<.001	−85.383	−50.853
Age (years)	−15.494	.047	−30.801	−0.187
Dependent variable: choroidal thickness 1500 μm temporal of the fovea
Alzheimer's group	−56.817	<.001	−73.304	−40.330
Age (years)	−16.378	.028	−30.995	−1.761
Dependent variable: choroidal thickness 500 μm nasal of the fovea
Alzheimer's group	−74.206	<.001	−93.108	−55.304
Age (years)	−19.848	.021	−36.606	−3.089
Dependent variable: choroidal thickness 1000 μm nasal of the fovea
Alzheimer's group	−70.080	<.001	−88.938	−51.222
Age (years)	−28.399	.001	−45.154	−11.644
Spherical equivalent	6.422	.013	1.369	11.476
Dependent variable: choroidal thickness 1500 μm nasal of the fovea
Alzheimer's group	−72.878	<.001	−92.412	−53.344
Age (years)	−24.992	.005	−42.348	−7.635
Spherical equivalent	7.242	.007	2.007	12.477
Dependent variable: choroidal thickness 1500 μm superior of the fovea
Alzheimer's group	−60.019	<.001	−77.838	−42.199
Age (years)	−17.421	.031	−33.254	−1.588
Spherical equivalent	5.283	.030	0.508	10.059
Dependent variable: choroidal thickness 500 μm inferior of the fovea
Alzheimer's group	−71.580	<.001	−91.832	−51.328
Age (years)	−18.570	.043	−36.525	−0.615
Dependent variable: choroidal thickness 1500 μm inferior of the fovea
Alzheimer's group	−61.618	<.001	−83.369	−39.867
Age (years)	−22.626	.022	−41.951	−3.301
Spherical equivalent	6.144	.039	0.315	11.973

^∗Reference category: control group 1; age: for each increase of 10 years; P-values were obtained by linear regression models.