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Table 3 Tukey’s multiple comparison between mean changes (postoperative minus preoperative values) in higher order aberrations (HOAs) postoperative

From: Induced Higher-order aberrations after Laser In Situ Keratomileusis (LASIK) Performed with Wavefront-Guided IntraLase Femtosecond Laser in moderate to high Astigmatism

Change (Δ) in higher-order aberrations Mean Diff. 95 % CI of diff. Significant?
Δ Coma vs. Δ Trefoil +0.03 −0.13 to 0.20 No
Δ Coma vs Δ Spherical Aberration −0.06 −0.23 to 0.11 No
Δ Coma vs Δ Secondary Astigmatism −0.08 −0.25 to 0.09 No
Δ coma vs. Δ HOA root-mean-square −0.22 −0.38 to −0.05 Yes
Δ Trefoil vs Δ Spherical Aberration −0.09 −0.26 to 0.07 No
Δ Trefoil vs. Δ Secondary Astigmatism −0.12 −0.28 to 0.05 No
Δ Trefoil vs. Δ HOA root-mean-square −0.25 −0.42 to −0.08 Yes
Δ Spherical Aberration vs. Δ Secondary Astigmatism −0.02 −0.19 to 0.14 No
Δ Spherical Aberration vs Δ HOA root-mean-square −0.16 −0.32 to 0.01 No
Δ Secondary Astigmatism vs. Δ HOA root-mean-square −0.14 −0.30 to 0.03 No
  1. The Mean difference (Mean diff) and 95 % confidence interval (CI) of mean difference are shown