Table 4 Comparison of AL change of right eyes among three groups.

Side	Group	Item	Follow-up Time (Months)				P for trend
Side	Group	Item	6 M	12 M	18 M	24 M	P for trend
Right	Group A	N	52	41	35	25	0.001*
	Ortho-K	AL Change	0.05 ± 0.14	0.15 ± 0.28	0.17 ± 0.26	0.25 ± 0.32	0.001*
	Group B	N	36	31	24	18	< 0.001*
	0.01%A	AL Change	0.20 ± 0.20	0.41 ± 0.32	0.65 ± 0.41	0.78 ± 0.40	< 0.001*
	Group C	N	36	29	15	13	< 0.001*
	0.05%A	AL Change	0.12 ± 0.15	0.29 ± 0.23	0.50 ± 0.33	0.63 ± 0.38	< 0.001*
	Between-group	P-value	< 0.001*	0.001*	< 0.001*	< 0.001*
	Post-hoc		A < B	A < B	A < C < B	A < C < B

Data are presented as n or mean ± standard deviation.
AL axial length, AL Change AL at different follow-up time—AL at baseline, A atropine, M month, Ortho-K orthokeratology.

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