Evaluation of childhood developing via optical coherence tomography-angiography in Qamdo, Tibet, China: A prospective cross-sectional, school-based study

Table 2 Clinical characteristics of the study samples and optical coherence tomography measurements of retinal and subfoveal choroidal thickness according to sex

	ALL (n = 347)	Girls (n = 182)	Boys (n = 165)	P value
Age, yr	10.62 ± 2.82 (range 5-18)	10.70 ± 2.84	10.53 ± 2.80	0.0781
Vision	4.78 ± 0.30	4.74 ± 0.33	4.83 ± 0.26	0.1043
AL, mm	23.31 ± 1.01	23.53 ± 0.89	23.10 ± 1.08	< 0.0001
SE, diopters	-0.88 ± 1.40	-0.96 ± 1.60	-0.79 ± 1.14	0.4601
Mean foveal thickness	239.81 ± 19.13	238.44 ± 20.13	241.33 ± 17.91	0.0097
FAZ, mm2	0.29 ± 0.13	0.30 ± 0.12	0.28 ± 0.14	0.0119
FVD, mm-1	20.38 ± 1.88	20.31 ± 1.85	20.45 ± 1.92	0.0210
IVD, mm-1	21.65 ± 1.92	22.50 ± 12.26	21.72 ± 1.91	0.0610
CVD, mm-1	10.43 ± 3.79	10.38 ± 4.04	10.49 ± 3.53	0.7800
cMean foveal thickness	227.64 ± 23.51	227.30 ± 21.87	228.73 ± 24.97	0.0863
cFAZ, mm2	0.27 ± 0.12	0.27 ± 0.10	0.28 ± 0.13	0.0029
cFVD, mm-1	19.35 ± 209	19.38 ± 2.09	19.32 ± 2.12	0.7931
cIVD, mm-1	21.00 ± 8.29	21.49 ± 11.93	20.58 ± 2.15	0.3343
cCVD, mm-1	9.93 ± 3.70	10.28 ± 3.88	9.49 ± 3.39	0.0513

AL: Axial length; FVD: Full vascular plexus density; CVD: Central vascular plexus density; IVD: Inner vascular plexus density; AL: Axial length; FAZ: Foveal avascular zone.