Impact of keratoconus stage on outcome after corneal crosslinking

BMC Ophthalmology

Table 2 BCVA, astigmatism and tomographic values of the three groups preoperatively and after 12 and 24 months

	preop			12 months			P value 12 months	24 months			P value 24 months
Group	I	II	III	I	II	III		I	II	III
BCVA	0.16 ± 0.17	0.26 ± 0.23	0.36 ± 0.14	0.1 ± 0.12	0.23 ± 0.17	0.25 ± 0.11	0.014	0.1 ± 0.14	0.26 ± 0.24	0.26 ± 0.12	0.032
Astigm	3.04 ± 1.7	4.43 ± 2.08	6.67 ± 3.48	2.98 ± 1.61	4.02 ± 2.07	5.77 ± 3.1	0.39	3.08 ± 1.38	3.82 ± 2.01	5.69 ± 2.69	0.023
Kmax	45.4 ± 2	50.3 ± 1.5	55.2 ± 1.5	45.3 ± 2.1	49.2 ± 1.9	53.8 ± 2.1	0.08	45.2 ± 2.2	48.2 ± 3.5	53.9 ± 1.7	0.27
Kmin	42.4 ± 1.7	45.7 ± 1.8	48.6 ± 3.3	42.3 ± 1.8	45 ± 2.3	48 ± 2.7	0.47	42.3 ± 2	44.5 ± 3.7	48.3 ± 2.6	0.65
MCT	483.5 ± 30.7	468.2 ± 31.1	450.5 ± 36.5	472.8 ± 38.7	446.8 ± 48.6	432 ± 41.4	0.32	477.9 ± 43.7	446.2 ± 52.1	429.4 ± 47	0.39
CCT	511.3 ± 30.8	491.5 ± 25.7	479.9 ± 35.6	500.6 ± 34.7	470.9 ± 43.8	463.8 ± 42.3	0.24	501.9 ± 39.4	476.6 ± 42.9	461.4 ± 36	0.60

The means, standard deviations and p values of the respective measurement data at the respective times in the different groups are presented. Bold font indicates statistical significance
BCVA Best corrected visual acuity, Astigm Astigmatism, Kmax Maximum corneal curvature, Kmin Minimum corneal curvature, minimum corneal thickness, MCT Minimum corneal thickness, CCT Central corneal thickness

ISSN: 1471-2415