Table 4.

Univariate linear regression of the baseline predictive factors and its impact on the treatment outcome.

Parameters	Univariate analysis				Univariate analysis
	Dependent variable: CDVA post-CXL				Dependent variable: K max post-CXL
	B	Significant p value	95% confidence interval		B	Significant p value	95% confidence interval
			Lower bound	Upper bound			Lower bound	Upper bound
CDVA	0.0505	<0.01∗	0.363	0.648	5.938	<0.01∗	2.383	9.494
K max	0.006	<0.01∗	0.003	0.009	0.844	<0.01∗	0.760	0.927
Age	–0.001	0.354	–0.004	0.001	–0.154	<0.01∗	–0.223	–0.086
Male sex	–0.200	0.305	–0.059	0.018	–0.203	0.677	–1.163	0.757
Posterior mean K	0.100	0.027∗	0.001	0.019	0.022	0.845	–0.201	0.244
Thinnest pachymetry	0.000	0.605	–0.001	0.000	–0.12	0.114	–0.27	0.003

^∗This parameter is set to zero because it is redundant.