Table 5 Comparison of adjusted post-operative metrics, accompanied by 95% confidence intervals and mean differences, between low and high kappa angle groups for high myopia eyes.

From: Comparison of visual outcomes and optical aberrations after SMILE with intraoperative Kappa angle adjustments between small and large Kappa angles

Variable

Low-Kappa

(n = 23)

High-Kappa

(n = 28)

Difference

p

logMAR

0 [−0.04, 0.03]

−0.04 [−0.07, −0.01]

−0.04 [−0.08, −0.01]

.037*

Postoperative MSE

0.23 [−0.08, 0.55]

0.15 [−0.11, 0.41]

−0.08 [−0.41, 0.24]

.665

Strehl ratio (3 mm)

0.37 [0.3, 0.45]

0.29 [0.23, 0.36]

−0.08 [−0.16, 0]

.086

Strehl ratio (6 mm)

0.17 [0.11, 0.23]

0.2 [0.14, 0.25]

0.03 [−0.04, 0.09]

.499

HOA (3 mm)

0.66 [0.47, 0.85]

0.79 [0.61, 0.96]

0.13 [−0.06, 0.31]

.317

HOA (6 mm)

0.88 [0.72, 1.05]

0.9 [0.76, 1.05]

0.02 [−0.15, 0.19]

.809

Horizontal Coma (3 mm)

0.04 [−0.01, 0.09]

0.11 [0.07, 0.15]

0.07 [0.02, 0.12]

.030*

Horizontal Coma (6 mm)

0.13 [0.06, 0.2]

0.17 [0.11, 0.23]

0.04 [−0.03, 0.11]

.383

Vertical Coma (3 mm)

0.06 [0.01, 0.1]

0.08 [0.04, 0.12]

0.02 [−0.02, 0.06]

.439

Vertical Coma (6 mm)

0.38 [0.28, 0.48]

0.17 [0.09, 0.26]

−0.21 [−0.31, −0.11]

.001**

Spherical Aberrations (3 mm)

0.06 [0, 0.11]

0.12 [0.08, 0.17]

0.07 [0.01, 0.12]

.037*

Spherical Aberrations (6 mm)

0.35 [0.28, 0.41]

0.26 [0.2, 0.31]

−0.09 [−0.16, −0.02]

.037*

  1. The reported means and the mean difference were computed from a linear mixed model that adjusted for age, gender, and pre-operative MSE as covariates.
  2. S-Kappa, small Kappa group; L-Kappa, large Kappa group; MSE, mean spherical error; logMAR, logarithm of the minimum angle of resolution. HOA, Higher-Order Aberrations; P, p value from linear mixed models.
  3. *for p value < .05, ** for p value < .01.
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