Table 2.

The variation of the SR, MTF cutoff and OSI with time in the SMILE and FS-LASIK group (mean ± SD)

	Preop	Post 1mo	Post 6mo	Post 12mo	p0-value
	SR
SMILE group	0.260 ± 0.064	0.221 ± 0.069*	0.212 ± 0.057*	0.233 ± 0.069*	0.057
FS-LASIK group	0.245 ± 0.077	0.185 ± 0.062*	0.175 ± 0.062*	0.178 ± 0.047*
p1-value	0.259	0.010	0.007	<0.001
	MTF cutoff
SMILE group	43.684 ± 7.955	39.161 ± 10.711*	37.547 ± 10.297*	40.552 ± 10.005	0.062
FS-LASIK group	41.462 ± 9.809	32.520 ± 12.305*	32.361 ± 10.764*	31.489 ± 9.626*
p1-value	0.151	0.007	0.029	<0.001
	OSI
SMILE group	0.49 ± 0.24	0.88 ± 0.53*	0.84 ± 0.44*	0.80 ± 0.53*	<0.001
FS-LASIK group	0.59 ± 0.33	1.63 ± 1.01*	1.39 ± 0.92*	1.29 ± 0.72*
p1-value	0.719	<0.001	0.001	0.001

SD: standard deviation. Preop: preoperative. Post 1mo: at 1 month postoperatively. Post 6mo: at 6 months postoperatively. Post 12mo: at 12 months postoperatively. p₀ = p value of the difference for the pre and post-operative variation of SR, MTF cutoff and OSI between the SMILE and FS-LASIK group. p₁ = p value of the difference in SR, MTF cutoff and OSI at each point of time between the SMILE and FS-LASIK group. When p < 0.05, the difference was statistically significant. * Compared with that before the surgery, p < adjusted alpha