Table 4.

Preoperative and postoperative topographical (Pentacam) parameters (mean ± SD) in the 2 studied groups 6 months and 12 months following the full procedure.

Measure	Group	Preoperative measure	6 months	12 months	P; repeated measure ANOVA	P; preoperative versus 6 m	P; preoperative versus 12 m	P; 6 m versus 12 m
K1 (D)	G1	43.3 ± 1.77	41.1 ± 1.33	41.0 ± 1.31	<0.001	<0.001	<0.001	0.91
	G2	42.9 ± 1.91	40.8 ± 1.39	40.9 ± 1.40	<0.001	<0.001	<0.001	0.88
	P ∗	0.23	0.55	0.31	—	—	—	—
K2 (D)	G1	45.9 ± 2.45	42.5 ± 1.45	42.1 ± 1.44	<0.001	<0.001	<0.001	0.92
	G2	45.4 ± 1.83	41.7 ± 1.62	41.8 ± 1.63	<0.001	<0.001	<0.001	0.79
	P ∗	0.11	0.37	0.42	—	—	—	—
Kmax (D)	G1	49.1 ± 4.1	46.2 ± 4.2	45.8 ± 4.4	<0.001	<0.001	<0.001	0.54
	G2	48.3 ± 5.4	44.9 ± 5.5	45.2 ± 5.3	<0.001	<0.001	<0.001	0.78
	P ∗	0.88	0.71	0.64	—	—	—	—
Q	G1	−0.47 ± 0.39	−0.29 ± 0.31	−0.28 ± 0.33	<0.001	<0.001	<0.001	0.77
	G2	−0.45 ± 0.41	−0.27 ± 0.33	−0.27 ± 0.34	<0.001	<0.001	<0.001	0.64
	P ∗	0.76	0.44	0.54	—	—	—	—
MCT	G1	466 ± 42	418 ± 37	421 ± 32	<0.001	<0.001	<0.001	0.43
	G2	475 ± 49	431 ± 39	433 ± 40	<0.001	<0.001	<0.001	0.71
	P ∗	0.22	0.09	0.12	—	—	—	—
ISV	G1	44.8 ± 26.8	39.2 ± 23.9	39.3 ± 23.8	0.001	0.003	0.003	0.91
	G2	43.9 ± 25.8	38.9 ± 22.1	38.8 ± 22.3	0.001	0.004	0.004	0.65
	P ∗	0.48	0.94	0.76	—	—	—	—
IVA	G1	0.47 ± 0.33	0.44 ± 0.28	0.45 ± 0.29	0.33	0.41	0.45	0.39
	G2	0.43 ± 0.30	0.41 ± 0.29	0.42 ± 0.29	0.27	0.38	0.41	0.32
	P ∗	0.55	0.68	0.73	—	—	—	—
IHA	G1	19.8 ± 11.2	18.3 ± 11.8	18.2 ± 12.1	0.77	0.69	0.71	0.59
	G2	18.3 ± 10.5	17.6 ± 10.6	17.5 ± 10.3	0.67	0.61	0.64	0.93
	P ∗	0.71	0.61	0.29	—	—	—	—
R min	G1	6.9 ± 0.45	7.4 ± 0.49	7.4 ± 0.49	0.021	0.032	0.033	0.83
	G2	7.1 ± 0.47	7.5 ± 0.51	7.6 ± 0.52	0.041	0.049	0.050	0.57
	P ∗	0.38	0.77	0.22	—	—	—	—
KI	G1	1.1 ± 0.09	1.07 ± 0.1	1.07 ± 0.1	0.009	0.008	0.008	0.89
	G2	1.2 ± 0.1	1.09 ± 0.1	1.09 ± 0.1	0.008	0.006	0.006	0.92
	P ∗	0.99	0.86	0.81	—	—	—	—

P ^∗: unpaired t-test for comparison between the 2 groups.

Significant P values are bolded.

Kmax: maximum keratometry.

Q: corneal asphericity.

MCT: minimum corneal thickness.

ISV: index of surface variance.

IVA: index of vertical asymmetry.

IHA: index of height asymmetry.

R min: minimum radius of curvature.

KI: keratoconus index.