[Multifactor analysis of the reasons causing undercorrection after laser in situ keratomileusis].
OBJECTIVE
To investigate the relationship between various factors and the undercorrection after laser in situ keratomileusis (LASIK).


METHODS
Of 1 391 eyes (696 cases), the undercorrection eyes grouped by left or right eye were analyzed by Chi-square test and logistic regression analysis based on age, sex, occupation, address, family history of myopia and all ophthalmologic examination results before and after LASIK.


RESULTS
The results of logistic regression analysis showed that the undercorrection after LASIK of both groups was related to four factors: the duration of myopia (left eye OR = 1.076, 95% CI: 1.030 - 1.124; right eye OR = 1.093, 95% CI: 1.046 - 1.142), preoperative refractive power (left eye OR = 7.799, 95% CI: 1.755 - 34.654; right eye OR = 28.823, 95% CI: 5.750 - 144.467), preoperative best corrected vision (left eye OR = 0.000, 95% CI: 0.000 - 0.262; right eye OR = 0.000, 95% CI: 0.000 - 0.144) and the corneal thickness (left eye OR = 0.976, 95% CI: 0.965 - 0.987; right eye OR = 0.975, 95% CI: 0.964 - 0.986).


CONCLUSIONS
Longer duration of myopia and the more refractive power seemed to be the risk factors, while the better corrected vision and the thicker thickness of cornea the protect factors of undercorrection after LASIK.
Liu
Han-qiang
HQ
Department of Ophthalmology, the First Affiliated Hospital of China Medical University, Shenyang 110001, China.
Shi
Jing-pu
JP
Ma
Chang-rong
CR
Zhang
Hui
H
Ma
Xiao-li
XL
Jin
Ying
Y
Jin
Xue-hai
XH
Wang
Hai-long
HL
D000293:Adolescent; D000328:Adult; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000706:statistics & numerical data; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009216:Myopia / Q000453:epidemiology / Q000601:surgery*; D012307:Risk Factors; D017211:Treatment Failure; D014792:Visual Acuity