Table 2. Association of clinical characteristics with IOP change in patients undergoing LASIK with an FS laser determined using an LMM and MLR.

	Linear mixed model			Multiple linear regression
Variable	Estimate	S.E.	P	Estimate	S.E.	P
Intercept	17.788	3.6	< .0001	16.515	2.081	0.002
Age at OP (β1)	-0.010	0.016	0.519	-0.008	0.014	0.586
gender‡ (β2)	-0.461	0.219	0.036	-0.219	0.124	0.078
MeanK (β3)	-0.1	0.0687	0.147	-0.470	0.189	0.013
CCT (β4)	-0.012	0.003	< .0001	-0.089	0.060	0.14
Flap thickness(β5)	-0.045	0.007	< .0001	-0.042	0.006	< .0001
Ablation depth (β6)	-0.035	0.004	< .0001	-0.036	0.004	< .0001

‡When the patient is male, gender = 1; otherwise gender = 0; PreIOP = preoperative IOP; CCT = preoperative central corneal thickness; Age at OP = age at operation