Table 2.
Polar value analysis of TCRP4.0.
| Group | Mean Keratometry (D) ± SD | P Valuea | P Valueb | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Preoperative | Postoperative | Change | |||||||
| AKP(+0) | AKP(+45) | AKP(+0) | AKP(+45) | △AKP(+0) | △AKP(+45) | △AKP(+0) | △AKP(+45) | ||
| Temporal | 0.87 ± 0.45 | 0 | −0.09 ± 0.62 | −0.04 ± 0.64 | −0.96 ± 0.76 | −0.04 ± 0.64 | <0.001 | <0.001 | 0.629 |
| Superotemporal | 0.99 ± 1.02 | 0 | −0.07 ± 1.05 | −0.02 ± 0.74 | −1.06 ± 1.79 | −0.02 ± 0.74 | <0.001 | <0.001 | 0.887 |
| Superonasal | 0.90 ± 0.62 | 0 | 0.16 ± 0.81 | −0.10 ± 0.67 | −0.73 ± 0.96 | −0.10 ± 0.67 | <0.001 | <0.001 | 0.234 |
| Superior | 1.12 ± 0.75 | 0 | 0.24 ± 0.88 | −0.03 ± 0.74 | −0.87 ± 1.05 | −0.03 ± 0.74 | <0.001 | <0.001 | 0.774 |
D = diopters; SD = standard deviation; △ = change; AKP = astigmatic polar value.
aHotelling trace between preoperative and postoperative keratometry.
bUnivariate analysis for △AKP(+0) and △AKP(+45).