Table 4. Interdependence of the 5 Dutch Crosslinking for Keratoconus Score Parameters Showing Significant but Modest Interitem Correlations (N = 504).

Variable	Quality of Vision	P Value	Age	P Value	Keratometry	P Value	Refraction	P Value
Age	0.155	<.001
Keratometry	0.199	<.001	0.067	.001
Refraction	−0.40	.045	−0.003	.87	0.002	.91
Visual acuity	0.154	<.001	0.002	.93	0.157	<.001	0.078	<.001