Table 2.

Results of corneal astigmatism and refractive astigmatism

	AK group	Pa	toric IOL group	Pa	Pb
Manifest refractive astigmatism (D)
Baseline	1.85 ± 1.07		1.84 ± 0.81		0.723
1-month postop	0.96 ± 0.37		0.62 ± 0.32		0.024
3-month postop	0.76 ± 0.42		0.67 ± 0.34		0.483
6-month postop	0.99 ± 0.51		0.68 ± 0.21		0.057
1-month vs baseline		0.001		0.001
3-month vs baseline		0.000		0.001
6-month vs baseline		0.028		0.001
Corneal astigmatism from automated keratometer (D)
Baseline	1.44 ± 0.39		1.50 ± 0.37		0.505
1-month postop	0.91 ± 0.37		1.22 ± 0.47		0.045
3-month postop	0.99 ± 0.67		1.35 ± 0.33		0.021
6-month postop	0.98 ± 0.69		1.37 ± 0.41		0.032
1-month vs baseline		0.001		0.114
3-month vs baseline		0.009		0.306
6-month vs baseline		0.013		> 0.999
Corneal astigmatism from topography (D)
Baseline	1.49 ± 0.36		1.60 ± 0.47		0.235
1-month postop	0.93 ± 0.44		1.40 ± 0.50		0.011
3-month postop	1.02 ± 0.52		1.50 ± 0.47		0.010
6-month postop	0.94 ± 0.40		1.53 ± 0.46		0.018
1-month vs baseline		< 0.001		0.048
3-month vs baseline		0.003		0.058
6-month vs baseline		0.010		0.149

Values are presented as mean ± standard deviation

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

^aComparison with baseline within groups assessed by Wilcoxon signed-rank test

^bComparison between groups assessed by Mann-Whitney U test