Table 2.
Intraclass correlation coefficient (ICC) results
| Tonometer pair | N | ICC (95% CI) | P | |
|---|---|---|---|---|
| All patients | GAT3M - GATpre | 30 | 0.400 (− 0.227–0.741) | < 0.001 |
| GAT12M - GATpre | 30 | 0.478 (− 0.113–0.758) | < 0.006 | |
| CT 3 M - GATpre | 30 | 0.669 (0.296–0.843) | < 0.002 | |
| CT 12 M - GATpre | 30 | 0.704 (0.383–0.859) | < 0.001 | |
|
IOPcc3M- CT3M |
30 | 0.450 (− 0.136–0.740) | < 0.010 | |
|
IOPcc12M - CT12M |
30 | 0.465 (− 0.196–0.764) | < 0.003 | |
| LASIK | GAT3M - GATpre | 19 | 0.418 (−0.221–0.781) | < 0.003 |
| GAT12M - GATpre | 19 | 0.516 (−0.171–0.811) | < 0.015 | |
| CT 3 M - GATpre | 19 | 0.808 (0.492–0.927) | < 0.000 | |
| CT 12 M - GATpre | 19 | 0.886 (0.703–0.956) | < 0.000 | |
|
IOPcc3M- CT3M |
19 | 0.405 (−0.252–0.748) | < 0.076 | |
|
IOPcc12M- CT12M |
19 | 0.568 (−0.185–0.843) | < 0.004 | |
| PRK | GAT3M - GATpre | 11 | 0.134 (−0.234–0.590) | < 0.261 |
| GAT12M - GATpre | 11 | 0.262 (0.581–0.752) | < 0.251 | |
| CT 3 M - GATpre | 11 | −0.196 (−1.817–0.619) | < 0.638 | |
| CT 12 M - GATpre | 11 | −0.266 (−3.896–0.663) | < 0.642 | |
|
IOPcc3M- CT3M |
11 | 0.272 (− 0.328–0.729) | < 0.116 | |
|
IOPcc12M- CT12M |
11 | 0.256 (− 0.332–0.719) | < 0.182 |
ICC is based on absolute agreement. Significant differences are marked in bold. CI, confidence Interval; p, value for correlation
GAT Goldmann applanation tonometer, CT Convex tonometer, IOPg Goldmann-correlated IOP, IOPcc Corneal-compensated IOP, M Months