Prevalence of Corneal Astigmatism in Patients before Cataract Surgery in Western China
Table 3
Demographic characteristics of the 2 ARC groups before and after matching for corneal astigmatism.
Variables
Before matching
value
After matching
value
ARC-w
ARC-s
ARC-w
ARC-s
Age (y)
Mean ± SD
64.75 ± 9.71
70.56 ± 9.55
<0.001
69.21 ± 9.03
69.21 ± 9.03
>0.99
Range
40, 103
40, 95
40, 94
40, 94
M/F (n)
3337/3728
1090/1661
<0.001
1022/1459
1022/1459
>0.99
CYL (D)
Mean ± SD
1.28 ± 1.04
1.01 ± 0.68
<0.001
1.30 ± 1.03
0.98 ± 0.67
<0.001
Range
0, 6.94
0.05, 6.59
0, 6.92
0.05, 6.59
K1 (D)
43.19 ± 1.50
43.77 ± 1.53
<0.001
42.92 ± 1.51
43.76 ± 1.52
<0.001
K2 (D)
44.24 ± 1.62
44.76 ± 1.56
<0.001
43.97 ± 1.64
44.74 ± 1.55
<0.001
AL (mm)
23.14 ± 0.95
23.45 ± 0.90
<0.001
23.88 ± 0.90
23.48 ± 0.90
<0.001
Type of astigmatism
WTR (%)
41.80
25.08
40.99
26.46
ATR (%)
38.89
58.26
<0.001
40.71
56.74
<0.001
Oblique (%)
19.31
16.66
18.30
16.80
ARC-w: age-related cataract in the western area; ARC-s: age-related cataract in the southern area; M: male; F: female; CYL: corneal astigmatism; K1: flat keratometry; K2: steep keratometry; AL: axial length; WTR: with the rule; ATR: against the rule; D: diopter.
