Comparison of Ocular Biometry Profiles in Urban and Rural Cataract Candidates in Eastern China

Table 2

Sex distribution of ocular biometric parameters.

Location/gender		Mean ± SD
		AL (mm)	ACD (mm)	Astigmatism (D)	K (D)
					K mean	K1	K2
Jinshan and Shanghai	All (5485)	23.98 ± 2.09	3.11 ± 2.09	1.07 ± 0.72	44.45 ± 1.51	43.92 ± 1.54	44.98 ± 1.58
	M (3360)	24.25 ± 1.91	3.20 ± 0.58	1.06 ± 0.70	44.00 ± 1.49	43.47 ± 1.51	44.53 ± 1.55
	F (2125)	23.81 ± 2.17	3.05 ± 0.57	1.07 ± 0.73	44.74 ± 1.16	44.20 ± 1.49	45.27 ± 1.53
	value (sex)	<0.001	<0.001	0.791	<0.001	<0.001	<0.001
Jinshan (rural)	All (2676)	23.58 ± 1.70	3.08 ± 0.57	1.09 ± 0.73	44.53 ± 1.50	43.98 ± 1.54	45.07 ± 1.55
	M (1030)	23.86 ± 1.66	3.17 ± 0.57	1.08 ± 0.68	44.04 ± 1.42	43.50 ± 1.47	44.58 ± 1.46
	F (1616)	23.40 ± 1.69	3.03 ± 0.57	1.10 ± 0.76	44.84 ± 1.46	44.29 ± 1.50	45.39 ± 1.53
	value (sex)	<0.001	<0.001	0.712	<0.001	<0.001	<0.001
Shanghai (urban)	All (2839)	24.35 ± 2.34	3.14 ± 0.58	1.04 ± 0.70	44.38 ± 1.52	43.86 ± 1.53	44.90 ± 1.60
	M (1095)	24.61 ± 2.06	3.24 ± 0.58	1.04 ± 0.72	43.96 ± 1.54	43.44 ± 1.54	44.29 ± 1.63
	F (1744)	24.18 ± 2.48	3.08 ± 0.57	1.05 ± 0.70	44.64 ± 1.45	44.12 ± 1.47	45.17 ± 1.52
	value (sex)	<0.001	<0.001	0.422	<0.001	<0.001	<0.001
value		<0.001	<0.001	0.010	<0.001	0.003	<0.001

ACD: anterior chamber depth; AL: axial length; K1: flat keratometry; K2: steep keratometry; D: diopter; M: male; F: female. Statistical significance of difference between the rural and urban groups.