Predictive Factors of the Standard Cross-linking Outcomes in Adult Keratoconus: One-Year Follow-Up

Table 3

The changes in BCVA and K max at one year among the defined subgroups.

The defined subgroups	BCVA changes			K max changes
	Mean difference	95% CI of the difference	value	Mean difference	95% CI of the difference	value
Age
≥30	0.0521	−0.2244–0.07004	0.152	−1.0147	−1.56319–2.1514	0.094
<30
Gender
Male	0.0224	−0.4162–0.1089	0.744	1.47611	0.75234–2.70457	0.184
Female
Preoperative BCVA
≥0.3 logMAR	0.3192	0.2250–0.4134	<0.001	2.7813	0.75532–4.8071	0.004
<0.3 logMAR
Preoperative K max
≥54 D	0.1611	−0.1511–0.2734	0.020	1.10143	0.52083–3.0843	0.122
<54 D
Thinnest pachymetry
≥450 μ	0.1214	−0.1527–0.1498	0.043	−1.7817	−3.8985–0.33497	0.098
<450 μ
Cone location
Eccentric	0.0822	0.04124–0.2056	0.187	3.0263	1.6574–6.6032	0.001
Central

SD: standard deviation; BCVA: best-corrected visual acuity; K max: maximum K reading; CI: confidence interval; test used: independent t-test, significant at the value <0.05; P1: significance of BCVA changes between the subgroups; P2: significance of K max changes between the subgroups.