Table 4.
Mean (standard deviation) corneal hysteresis and corneal resistance factors according to IOP group.
| IOPcc | IOPg | |||||
|---|---|---|---|---|---|---|
| CH | CRF | CH | CRF | |||
| PIO | No. | Mean ±SD | Mean ±SD | No. | Mean ±SD | Mean ±SD |
| < 10 | 10 | 12.1±1.2 | 10.2±1.4 | 15 | 10.2±1.5 | 8.3±1.4 |
| 10 - 15 | 106 | 10.9±1.4 | 10.1±1.7 | 116 | 10.2±1.6 | 9.4±1.5 |
| 15 - 20 | 84 | 9.9±1.6 | 10.1±2 | 74 | 10.9±1.6 | 11.3±1.4 |
| >20 | 26 | 9.0±1.8 | 10.8±1.8 | 21 | 9.7±2.2 | 11.8±1.9 |
| P value for trend | <0.001* | 0.204 | 0.337 | <0.001* | ||
SD, standard deviation; CH, corneal hysteresis; CRF, corneal resistance factor; IOPcc, corneal compensated intraocular pressure; IOPg, Goldmann-correlated intraocular pressure.
*
Test for differences in trend between IOP groups.