Table 3.
Mean differences for IOP measurements in pre-surgery with GAT and at 3 and 12 months after surgery with GAT, CT and IOPcc
| IOP difference | GAT3M - GATpre | GAT12M - GATpre |
CT3M - GATpre | CT12M - GATpre | CT3M -IOPcc3M | CT12M -IOPcc12M | |
|---|---|---|---|---|---|---|---|
| All | md (bias) | −3.80 | −2.43 | −0.0333 | 0.533 | 2.70 | 3.27 |
| Wilcoxon test | Z = -4.747;p < 0.000 | Z = -3904;p < 0.000 | Z = -0.361;p = 0.718 | Z = -0.888;p = 0.375 | Z = -3.754;p < 0.000 | Z = -4.618;p < 0.000 | |
|
LASIK GV |
md (bias) | −4.52 | −2.74 | −1.11 | 0.158 | 2.04 | 2.91 |
| Wilcoxon test | Z = -3.836;p < 0.000 | Z = -3.209;p < 0.001 |
Z = -2.017; p = 0.440 |
Z = -0.776;p = 0.438 |
Z = -2.636; p = 0.008 |
Z = -3.582;p < 0.000 | |
| PRK | md (bias) | −2.54 | −1.91 | 1.82 | 1.18 | 3.83 | 3.89 |
| Wilcoxon test | Z = -2.185;p < 0.005 | Z = -2.203;p = 0.028 | Z = -1.616;p = 0.106 | Z = -6.55;p = 0.512 | Z = -2.667;p = 0.008 | Z = -2.936;p = 0.03 |
Mean differences between GATpre, GAT, IOPcc and CT after surgery (at 3 and 12 months) were calculated and tested for the absence of differences using the Wilcoxon test. Significant differences are marked in bold. md, mean difference; Z, Wilcoxon test; p, probability value
GAT Goldmann applanation tonometer, CT Convex tonometer, IOPg Goldmann-correlated IOP, IOPcc Corneal-compensated IOP, M Months