. 2022 Sep 23;22:382. doi: 10.1186/s12886-022-02572-y

Table 2.

Vessel density, FAZ and ChC before and after orthokeratology in two group

	T group		P	S group		P
	Baseline	three months	P	Baseline	three months	P
SCP vessel density (%)
Whole area	48.7 ± 2.1	49.2 ± 2.6	0.459^a	48.8 ± 2.3	49.7 ± 2.4	0.171^a
Superior-Hemi	48.5 ± 1.9	49.0 ± 2.9	0.551^a	48.8 ± 2.0	49.8 ± 2.2	0.121^a
Inferior-Hemi	49.0 (40.9–52.7)	49.3 ± 2.2	0.616^b	48.8 ± 2.8	49.8 ± 2.5	0.220^a
Fovea	19.7 (14.2–30.2)	23.3 ± 5.0	0.002^b	19.8 ± 5.3	21.6 ± 5.4	0.103^a
Parafovea	50.6 ± 2.3	52.7 ± 2.7	0.003^a	51.2 ± 2.5	53.3 ± 2.1	0.004^a
Superior-Hemi	51.4 ± 1.9	51.6 ± 3.6	0.864^a	51.6 ± 2.3	52.5 ± 2.6	0.210^a
Inferior-Hemi	51.3 ± 2.5	52.2 ± 2.8	0.240^a	51.9 ± 3.0	53.3 ± 2.5	0.102^a
Tempo	50.5 (41.8–54.9)	50.6 ± 3.3	0.658^b	50.6 ± 2.9	51.9 ± 2.4	0.126^a
Superior	52.5 ± 2.3	52.9 ± 3.5	0.655^a	52.4 ± 2.9	54.0 ± 2.7	0.098^a
Nasal	50.7 ± 2.3	51.2 (39.1 ~ 55.7)	0.943^b	51.0 ± 2.4	51.8 ± 2.9	0.302^a
Inferior	51.8 (41.7–57.1)	53.3 ± 3.6	0.189^b	53.0 (40.8–57.1)	54.2 ± 2.7	0.089^b
DCP vessel density (%)
Whole area	53.5 ± 3.4	55.7 ± 2.6	< 0.001^a	52.8 ± 3.0	54.8 ± 2.8	0.001^a
Superior-Hemi	54.7 ± 3.4	55.3 ± 3.3	0.464^a	53.5 ± 3.1	54.9 ± 3.4	0.052^a
Inferior-Hemi	54.8 (45.2–59.2)	54.5 ± 2.6	0.573^b	52.7 ± 3.1	54.0 ± 2.9	0.052^a
Fovea	36.3 ± 4.5	39.3 ± 6.5	0.013^a	34.2 ± 5.6	35.3 ± 5.1	0.340^a
Parafovea	56.2 ± 3.2	57.3 ± 3.2	0.113^a	55.0 ± 2.7	57.0 ± 2.9	0.001^a
Superior-Hemi	56.7 ± 3.1	57.2 ± 3.8	0.465^a	55.7 ± 2.8	57.1 ± 3.5	0.044^a
Inferior-Hemi	56.0 ± 3.7	57.0 ± 2.9	0.217^a	54.9 ± 2.8	56.4 ± 2.9	0.019^a
Tempo	56.7 ± 3.1	57.3 ± 2.7	0.367^a	55.8 ± 2.6	57.0 ± 2.8	0.045^a
Superior	56.9 ± 3.5	57.7 ± 3.6	0.319^a	55.6 ± 3.0	57.1 ± 3.9	0.119^a
Nasal	56.6 ± 2.8	57.5 ± 3.0	0.088^a	55.8 ± 2.8	56.8 ± 3.7	0.101^a
Inferior	55.4 (45.5–61.2)	56.2 ± 3.9	0.297^b	54.2 ± 3.3	55.9 ± 3.0	0.027^a
RPC vessel density (%)
Whole area	49.6 ± 2.1	51.3 (49.1–56.3)	0.001^b	49.3 ± 2.2	50.9 ± 2.1	0.005^a
Inside disc	50.9 ± 5.5	56.5 (39.1–61.8)	< 0.001^b	51.3 ± 4.6	55.2 ± 3.7	0.003^a
Peripapillary	52.0 ± 2.5	52.7 ± 2.4	0.367^a	51.9 ± 2.3	52.3 ± 2.1	0.478^a
Superior-Hemi	52.3 ± 2.6	53.0 ± 2.1	0.344^a	52.3 ± 2.2	52.6 (42.4–57.7)	0.568^b
Inferior-Hemi	51.8 ± 2.9	53.0 ± 3.1	0.224^a	51.9 ± 2.7	52.1 ± 2.6	0.811^a
FAZ (mm²)	0.27 ± 0.06	0.24 ± 0.07	0.024^a	0.31 ± 0.07	0.27 ± 0.07	0.002^a
ChC (mm²)	2.18 ± 0.10	2.26 ± 0.10	0.004^a	2.19 ± 0.08	2.27 (2.11–2.80)	< 0.001^b

Significant P values are in bold

Values are shown as mean ± standard deviation and median (range)

^aPaired t-test

^bWilcoxon signed-rank test

FAZ foveal avascular zone, ChC choriocapillaris, SCP superficial capillary plexus, DCP deep capillary plexus, RPC radial peripapillary capillary