Table 6.

Generalized Estimating Equations of independent variable of regression after PRK

Factor	OR (%95 C. I)	P value
Age (years)	1.01 (0.95 to 1.06)	0.69
Sex (male vs. female)	1.28 (0.29 to 1.91)	0.79
Thickness (μm)	0.99 (0.98 to 1.03)	0.12
Irregularity 5 (mm)	3.56 (1.32 to 9.22)	0.01
SimK (D)	2.80 (1.01 to 8.20)	0.04
Astigmatism value (D)	2.01 (0.98 to 4.92)	0.06
Sphere value (D)	1.98 (1.59 to 2.54)	0.01
Right or Left	1.07 (0.69 to 1.87)	0.80

Adjusted odds ratio: age, sex, thickness, irregularity 5 mm, simulated keratometry astigmatism, Astigmatism value, Sphere value