Table 1.

Baseline data of the four diagnostic groups.

Parameters	Emmetropia (45 eyes/25 patients)	Low myopia (71 eyes/47 patients)	Moderate myopia (145 eyes/72 patients)	High myopia (51 eyes/33 patients)	P
SE (D)	0.25 ± 0.43	−2.15 ± 0.69	−4.23 ± 0.77	−8.69 ± 2.88	<0.001a
Sex (M/F)	10/15	27/20	29/43	10/23	0.057b
Age (years)	35.37 ± 7.73	33.60 ± 7.12	32.24 ± 6.68	33.88 ± 9.85	0.091a

D: diopters; F: female; M: male.

Data were presented as mean ± SD of the indicated variables.

^aOne-way analysis of variance.

^b χ-test.

Significant differences in refraction were present among the four groups (post hoc test, P < 0.05).