Effect of Orthokeratology on myopia progression: twelve-year results of a retrospective cohort study

BMC Ophthalmology

Table 1 Comparison of Demographics between OK Group and Control Group

Variable	OK Group	Control Group	P-value	Total
Number of eyes	131	72		203
Wearing Age	11.65 ± 0.24	11.83 ± 0.26	0.628	11.72 ± 0.18
Gender			0.058
Male	61 (46.6%)	44 (61.1%)		105 (51.7%)
Female	70 (53.4%)	28 (38.9%)		98 (48.3%)
Sphere refraction (D)	−3.82 ± 0.14	−3.48 ± 0.20	0.167	−3.70 ± 0.12
Cylinder refraction (D)	−0.56 ± 0.07	−0.52 ± 0.08	0.683	−0.55 ± 0.05
M	−3.54 ± 0.14	−3.22 ± 0.19		−3.43 ± 0.12
J0	−0.26 ± 0.03	−0.25 ± 0.04		−0.26 ± 0.03
J45	−0.03 ± 0.01	0.03 ± 0.01		−0.01 ± 0.01
Follow-up Time (years)	6.20 ± 0.21	6.53 ± 0.17	0.291	6.32 ± 0.15

Data are presented as n(%) or mean ± standard error of the mean
*p-value < 0.05 was considered statistically significant after test
D, diopters; M, the spherical equivalent; J0, the astigmatism power vector associated with a horizontally oriented axis; J45, the astigmatism power vector associated with an obliquely oriented axis in the 45° meridian

ISSN: 1471-2415