Table 1. Relationship between CXL and baseline examination data (multiple logistic regression analysis).

Factors	Wald score	P-value	95%CI
Age	11.695	0.001	0.080–0.446
Gender	0. 037	0. 847	-0.510–0.919
History of atopic dermatitis	2.705	0.100	-0.832–0.994
Age on diagnosis	6.275	0.012	-0.305–0.071
BSCVA	0.482	0.488	-2.936–2.898
Manifest cylinder value	1.544	0.214	-0.265–0.389
Manifest spherical equivalent	0.848	0.357	-0.237–0.152
IOP	0.044	0. 834	-0.218–0.204
K2 on the anterior float	2.001	0.157	-2.427–1.384
K2 on the posterior float	1.678	0.195	-1.787–2.956
Total K2	2.112	0.146	-1.430–2.362
ISV	5.802	0.016	-0.112–0.142
IVA	7.036	0.008	-12.199–2.302
KI	4.665	0.031	-2.816–39.619
CKI	2.936	0.087	-7.378–35.953
IHA	0.229	0.632	-0.013–0.032
IHD	6.455	0.011	-29.139–14.853
Rmin	7.380	0.007	-1.014–6.718
TKC; 2 and below vs 2–3 or more	7.828	0.005	-57498.416–57456.610
TKC; 0 vs possible or more	8.607	0.014	-2.650–4.141
TKC; 1–2 or below vs 2	8.996	0.029	-1.244–5.877
TKC; possible vs 1 and 1–2	9.389	0.052	-5.458–2.029
TKC; 1 vs 1–2	9.500	0.091	-3.733–1.680
TKC; 2–3 vs 3 or more	8.350	0.015	-1.897–3.441
TKC; 3 vs 3–4 and 4	8.439	0.038	-1.691–5.393
TKC; 3–4 vs 4	8.439	0.077	-10.601–2.494
CCT	0.952	0.329	-0.037–0.028
TCT	1.879	0.171	-0.037–0.026

CXL, corneal cross-linking; BSCVA, best spectacle-corrected visual acuity; IOP, intraocular pressure; K2, the steepest keratometric value indicated by Pentacam^® HR; ISV, index of surface variance; IVA, index of vertical asymmetry; KI, keratoconus index; CKI, center KI; IHA, index of height asymmetry; IHD, index of height decentration; Rmin, the minimum sagittal curvature evaluated by Pentacam^®; TKC, topographic keratoconus classification; CCT, central corneal thickness; TCT, thinnest corneal thickness; 95% CI, 95% confidence interval.