Two-year topographic and densitometric outcomes of accelerated (45 mW/cm2) transepithelial corneal cross-linking for keratoconus: a case-control study

Table 3 Differences in Corneal Densitometry Between Groups

Locations	Pre-operation (n = 25)	24 months Post-operation	Control	F^a	P
	Pre-operation (n = 25)	(n = 22)	(n = 25)
	Mean ± SD	Mean ± SD	Mean ± SD
Anterior layer (Φ 0–2 mm)	25.28 ± 4.42	21.31 ± 3.86	20.44 ± 1.35	14.608	< 0.001^b
Anterior layer (Φ 2–6 mm)	21.66 ± 3.05	18.20 ± 1.82	17.07 ± 2.71	22.590	< 0.001^b
Central layer (Φ 0–2 mm)	15.91 ± 2.34	13.49 ± 2.68	12.78 ± 1.53	17.215	< 0.001^b
Central layer (Φ 2–6 mm)	13.80 ± 1.80	11.51 ± 1.46	12.22 ± 1.66	20.404	< 0.001^b
Posterior layer (Φ 0–2 mm)	11.94 ± 2.49	9.95 ± 2.26	12.39 ± 3.09	9.130	=0.001^b
Posterior layer (Φ 2–6 mm)	12.51 ± 1.74	10.44 ± 1.29	10.33 ± 1.47	21.574	< 0.001^b
Total layer (Φ 0–2 mm)	17.72 ± 2.74	14.94 ± 2.74	14.07 ± 2.14	15.995	< 0.001^b
Total layer (Φ 2–6 mm)	15.99 ± 2.08	13.40 ± 1.37	13.33 ± 1.19	22.801	< 0.001^b

Φ Annular diameters, ^a Mixed linear model analysis, ^bA significant difference was detected

ISSN: 1471-2415