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

Table 3.

Vessel density, FAZ, ChC and SFChT of two age groups before and after toric orthokeratology

	8-11y (n = 12)		P	12-15y (n = 12)		P
	Baseline	three months	P	Baseline	three months	P
SCP vessel density(%)
Whole area	48.6 ± 2.4	49.0 ± 2.5	0.679^a	48.8 ± 1.9	49.3 ± 2.8	0.027^a
Fovea	19.8 (16.0–28.3)	23.5 ± 4.4	0.034^b	19.7 ± 4.4	23.1 ± 5.8	0.060^a
Parafovea	50.6 ± 2.4	52.2 ± 2.9	0.147^a	50.7 ± 2.4	53.1 ± 2.6	0.003^a
DCP vessel density (%)
Whole area	52.1 ± 3.0	55.2 ± 2.4	0.005^a	54.9 ± 3.3	56.1 ± 2.9	0.010^a
Fovea	37.9 ± 5.4	40.2 ± 7.1	0.145^a	34.7 ± 2.9	38.4 ± 6.2	0.054^a
Parafovea	55.4 ± 2.9	56.3 ± 3.0	0.507^a	57.0 ± 3.5	58.4 ± 3.2	0.016^a
RPC vessel density(%)
Whole area	49.1 ± 1.6	51.7 (50.5–56.3)	0.005^b	50.1 ± 2.4	51.4 ± 2.2	0.075^a
Inside disc	52.0 ± 4.9	56.0 ± 3.7	0.007^a	49.8 ± 6.0	53.4 ± 6.2	0.002^a
FAZ (mm²)	0.25 ± 0.07	0.24 ± 0.07	0.397^a	0.29 ± 0.06	0.20 (0.16–0.37)	0.050^b
ChC (mm²)	2.24 (2.02–2.27)	2.18 ± 0.09	0.084^b	2.19 ± 0.11	2.28 ± 0.11	0.024^a
SFChT (μm)	282.7 ± 23.2	298.4 ± 21.0	0.000^a	291.3 ± 30.3	304.6 ± 26.9	0.000^a

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, SFChT subfoveal choroidal thickness, SCP superficial capillary plexus, DCP deep capillary plexus, RPC radial peripapillary capillary