Table 3.

Vector analysis of refractive astigmatism

	AK group	Pa	toric IOL group	Pa	Pb
Surgically induced refractive correction (D)
1-month postop	1.49 ± 1.12		1.69 ± 0.84		0.211
3-month postop	1.57 ± 1.51		1.49 ± 0.75		0.465
6-month postop	1.36 ± 0.93		1.40 ± 0.87		0.973
1-month vs 3-month		0.884		0.006
3-month vs 6-month		0.794		0.807
1-month vs 6-month		0.401		0.009
Error ratio
1-month postop	0.66 ± 0.44		0.31 ± 0.21		0.011
3-month postop	0.60 ± 0.44		0.37 ± 0.10		0.071
6-month postop	0.69 ± 0.58		0.39 ± 0.30		0.105
1-month vs 3-month		0.469		0.552
3-month vs 6-month		0.222		0.965
1-month vs 6-month		0.463		0.414
Correction ratio
1-month postop	0.80 ± 0.40		0.99 ± 0.25		0.108
3-month postop	0.82 ± 0.54		0.81 ± 0.23		0.465
6-month postop	0.78 ± 0.43		0.78 ± 0.32		0.840
1-month vs 3-month		0.931		0.004
3-month vs 6-month		0.809		0.650
1-month vs 6-month		0.681		0.013
Error of magnitude (D)
1-month postop	0.31 ± 0.62		0.05 ± 0.55		0.194
3-month postop	0.24 ± 1.18		0.34 ± 0.51		0.808
6-month postop	0.47 ± 0.70		0.44 ± 0.69		0.813
1-month vs 3-month		0.884		0.006
3-month vs 6-month		0.794		0.807
1-month vs 6-month		0.401		0.009
Error of angle (°)
1-month postop	15.13 ± 67.82		7.01 ± 75.03		0.820
3-month postop	−0.03 ± 75.59		−4.42 ± 82.27		0.697
6-month postop	6.00 ± 65.83		−12.96 ± 74.47		0.522
1-month vs 3-month		0.426		0.594
3-month vs 6-month		0.968		0.650
1-month vs 6-month		0.575		0.221

Values are presented as mean ± standard deviation

D = diopters; AK = arcuate keratotomy; IOL = intraocular lens

^aComparison between follow-up period within groups assessed by Wilcoxon signed-rank test

^bComparison between groups assessed by Mann-Whitney U test