Table 4.

Analysis of keratoconus patients with (Intervention) and without (Control) cross-linking regarding visual acuity BCVA.

	Gender	n	Mean	Med	Min	Max	SD
Control V1	Male	31	0.60	0.63	0.20	1.00	0.23
	Female	6	0.69	0.80	0.40	0.80	0.18
	All	37	0.61	0.63	0.20	1.00	0.22
Control V6	Male	31	0.59	0.50	0.16	1.00	0.23
	Female	6	0.57	0.50	0.40	0.80	0.15
	All	37	0.59	0.50	0.16	1.00	0.22
Intervention V1	Male	24	0.39	0.40	0.05	1.00	0.23
	Female	7	0.51	0.63	0.16	0.80	0.22
	All	31	0.41	0.4	0.05	1.00	0.23
Intervention V2	Male	24	0.21	0.16	0.05	0.63	0.16
	Female	7	0.18	0.10	<0.05	0.5	0.18
	All	31	0.20	0.16	<0.05	0.63	0.16
Intervention V3	Male	24	0.33	0.32	0.1	0.80	0.19
	Female	7	0.36	0.32	0.125	0.63	0.15
	All	31	0.34	0.32	0.10	0.80	0.18
Intervention V4	Male	24	0.41	0.40	0.10	0.80	0.224
	Female	7	0.371	0.40	0.20	0.63	0.139
	All	31	0.403	0.40	0.10	0.80	0.206
Intervention V5	Male	*)	*)	*)	*)	*)	*)
	Female	*)	*)	*)	*)	*)	*)
	All	*)	*)	*)	*)	*)	*)
Intervention V6	Male	24	0.377	0.32	0.05	0.80	0.22
	Female	7	0.683	0.80	0.32	0.80	0.18
	All	31	0.466	0.50	0.05	0.80	0.25

*) not applicable.