Determination of the time of refractive stability after uneventful phacoemulsification in Indian eyes

Table 5 Refractive stability by axial length wise distribution

Parameters	1 wk post operative			6 wk postoperative			P value1	P value2	P value3
	Axial length in mm			Axial length in mm
	< 22	22-25	> 25	< 22	22-25	> 25
Sphere							> 0.99	0.989	0.317
mean ± SD	0.1 ± 0.4	0.1 ± 0.4	-0.2 ± 0.4	0.04 ± 0.3	0.01 ± 0.3	-0.2 ± 0.3
Median (IQR)	0 (0-0)	0 (0-0)	0 (-0.75 to 0)	0 (0-0)	0 (0-0)	0 (-0.5 to 0)
Range	-0.75 to 1	-1.5 to 1	-0.75 to 0	-0.75 to 1	-0.75 to 1.5	-0.5 to 0
Cylinder							0.765	0.783	0.782
mean ± SD	-0.1 ± 0.7	-0.3 ± 0.6	-1.6 ± 1.7	-0.2 ± 0.6	-0.2 ± 0.7	-0.8 ± 0.4
Median (IQR)	-0.5 (-0.6 to 0.5)	-0.5 (-0.75 to 0.1)	-0.75 (-3.5 to -0.5)	-0.5 (-0.5 to 0.5)	-0.5 (-0.75 to 0.5)	-0.75 (-1.2 to -0.5)
Range	-1.5 to 1.25	-1.5 to 1.5	-3.5 to 0.5	-1.25 to 0.75	-1.5 to 1. 5	-1.25 to 1.5
Spherical equivalent							0.982	0.19	0.477
mean ± SD	-0.01 ± 0.4	-0.1 ± 0.4	-0.6 ± 0.7	-0.04 ± 0.3	-0.1 ± 0.4	-0.4 ± 0.3
Median (IQR)	0 (-0.25 to 0.25)	0 (-0.25 to 0)	-0.37 (-1 to 0)	0 (-0.25 to 0.25)	0 (-0.25 to 0)	-0.37 (-0.62 to 0)
Range	-1 to 1	-1.5 to 1.37	-1.75 to 0	-1 to 1	-1 to 1.75	-0.75 to 0
P value4	0.559			0.657			-
P value5	0.123			0.226
P value6	0.091			0.164

¹Wilcoxon Sign rank test to compare the patients with axial length < 22 mm between 1^st wk and 6^th wk post-operative.

²Wilcoxon Sign rank test to compare the patients with axial length 22 to 25 mm between 1^st wk and 6^th wk post-operative.

³Wilcoxon Sign rank test to compare the patients with axial length > 25 mm between 1^st wk and 6^th wk post-operative.

⁴Kruskal-Wallis test for comparing axial length and spherical power.

⁵Kruskal-Wallis test for comparing axial length and cylindrical power.

⁶Kruskal-Wallis test for comparing axial length and spherical equivalent.

IQR: Interquartile range.