Table 2

Retinal vessel calibre percentiles

Retinal calibre	Child							Parent
Retinal calibre	P5	P10	P25	P50	P75	P90	P95	P5	P10	P25	P50	P75	P90	P95
Central retinal arteriolar equivalent, µm
Male	137.1	141.5	148.0	158.0	165.1	170.7	174.2	123.6	128.7	139.9	148.3	158.2	167.2	171.6
Female	143.8	147.3	153.8	162.5	169.9	175.3	179.3	128.8	134.8	143.3	152.1	162.3	169.1	174.0
All	139.8	144.0	151.3	160.2	167.6	173.1	178.5	128.1	134.1	143.0	151.4	161.7	169.0	173.7
Central retinal venular equivalent, µm
Male	203.3	208.9	217.7	226.7	237.4	247.4	252.7	186.8	190.9	202.1	215.4	231.5	247.6	261.5
Female	208.8	213.3	222.6	234.0	245.4	256.8	262.8	192.3	197.5	208.4	220.8	233.8	244.8	253.0
All	206.1	210.8	220.4	230.4	241.4	252.1	259.3	190.9	196.8	207.2	220.2	233.7	245.7	253.0
Arteriolar–venular ratio
Male	0.61	0.63	0.66	0.69	0.72	0.76	0.78	0.60	0.61	0.64	0.67	0.73	0.78	0.79
Female	0.61	0.62	0.66	0.69	0.73	0.76	0.78	0.59	0.61	0.65	0.69	0.73	0.77	0.78
All	0.61	0.63	0.66	0.69	0.72	0.76	0.78	0.59	0.61	0.65	0.69	0.73	0.77	0.78

P, percentile.