Table 2.

Changes in posterior corneal elevations after SMILE and FS-LASIK

Measuring position	Postoperative period (SMILE)				P value†	Postoperative period (FS-LASIK)		P value†
	1 Day	3 Months	6 Months	2 Years		1 Day	Long-term
PCE	−0.69±2.63	0.82±2.75	−0.23±2.43	−1.18±3.06	0.410	0.25±1.62	−0.59±1.40	0.384
PTE	−0.79±3.44	−0.36±3.20	−1.53±3.56	−1.94±3.21*	0.138	−0.04±3.26	−1.91±2.98*	0.042*
PME	0.10±3.06	0.32±3.00	−0.58±2.76	−0.47±3.07	0.988	0.21±3.11	−0.35±2.10	0.421
PAE	−0.57±2.20	−0.00±2.39	−0.06±2.38	−0.63±2.91	0.762	0.41±1.25	−0.22±0.89	0.237
Concentric circle
2 mm	−0.42±2.61	0.35±2.75	−0.10±2.72	−0.99±2.89	0.662	0.15±1.58	−0.56±1.18	0.449
4 mm	−0.87±2.28	−0.21±2.55	−0.18±2.38	−0.92±2.50	0.480	0.38±1.15	−0.22±0.99	0.281
6 mm	−0.63±1.81	−0.62±2.57	−0.01±2.12	−0.67±2.06	0.487	0.29±0.82	0.13±0.98	0.237
Hemisphere
NPCE	−0.74±2.07	0.52±2.55	−0.03±2.72	−0.55±2.88	0.576	0.03±1.08	−0.02±1.08	0.917
TPCE	−0.58±3.14	−0.35±3.07	−2.03±1.39*	−1.32±3.27	0.026*	0.25±1.36	−0.44±1.12	0.362
IPCE	−1.15±2.72	−1.12±2.84	−0.93±2.01	−1.00±2.19	0.386	1.57±2.18	0.01±1.95	0.179
SPCE	−0.40±2.43	0.77±2.80	0.44±2.98	−0.58±3.37	0.545	−0.66±1.26	−0.36±1.11	0.833

All data are expressed as the mean±SD (μm).

*P<0.05.

†Compared to preoperation using mixed linear models for repeated measurements.

PAE, posterior average elevation.