Table 4.

Graft survival rate and refractive data

	ALI	PBK	FED	P value
Graft survival rate at postoperative 6 m (eyes, %)	50 (92.6%)	26 (92.9%)	20 (95.2%)
Induced astigmatism (D)
1 m	1.4 ± 1.2	2.5 ± 2.1	2.3 ± 1.4	0.007*
3 m	1.5 ± 1.1	2.3 ± 1.1	2.0 ± 1.6	0.036*
6 m	1.5 ± 1.0	1.8 ± 0.7	1.7 ± 1.3	NS*
Spherical equivalence (D)
Preoperative	0.69 ± 2.6	−0.74 ± 1.86	−0.25 ± 1.5	NS*
1 m	0.31 ± 1.6	−0.48 ± 2.2	−0.39 ± 2.2	NS*
3 m	0.17 ± 1.2	−0.94 ± 2.0	1.6 ± 5.26	NS*
6 m	−0.15 ± 0.78	−0.94 ± 2.0	−2.7 ± 4.3	NS*
Keratometric value
Preoperative	44.5 ± 2.4	43.8 ± 2.0	44.5 ± 2.3	NS*
1 m	43.3 ± 2.4	43.3 ± 2.2	44.0 ± 2.2	NS*
3 m	44.0 ± 2.2	43.6 ± 1.9	43.5 ± 2.6	NS*
6 m	44.0 ± 2.1	43.7 ± 2.1	43.8 ± 1.4	NS*

Data were presented as mean ± SD. *Kruskal–Wallis test compared the difference among three groups