Table 2.

Comparisons of parameters of the ARC patients by sex and age group.

Group	CYL (D) mean ± SD	K1 (D) mean ± SD	K2 (D) mean ± SD	AL (mm) mean ± SD	Astigmatism type
					WTR (%)	ATR (%)	Oblique (%)
Sex
Male	1.32 ± 1.06	43.10 ± 1.49	44.25 ± 1.60	23.14 ± 0.94	42.38	38.12	19.50
Female	1.25 ± 1.03	43.27 ± 1.50	44.23 ± 1.63	23.14 ± 0.97	41.55	39.40	19.05
P value	<0.001	<0.001	0.45	0.66		0.36
Age
40–49	1.25 ± 1.03	43.05 ± 1.47	44.13 ± 1.57	23.15 ± 0.99	42.30	40.19	17.51
50–59	1.27 ± 1.05	43.16 ± 1.50	44.21 ± 1.60	23.12 ± 0.97	41.86	38.37	19.77
60–69	1.29 ± 1.09	43.19 ± 1.49	44.24 ± 1.62	23.12 ± 0.93	41.94	38.37	19.69
70–79	1.30 ± 1.07	43.22 ± 1.50	44.26 ± 1.62	23.19 ± 0.97	41.54	39.24	19.22
≥80	1.23 ± 0.82	43.32 ± 1.57	44.41 ± 1.78	23.16 ± 0.96	41.45	41.45	17.10
P value	0.44	0.007	0.04	0.003		0.77

ARC: age-related cataract; CYL: corneal astigmatism; K1: flat keratometry; K2: steep keratometry; AL: axial length; WTR: with the rule; ATR: against the rule; D: diopter.