Table 2.
Demographic Data of the Study Groups Expressed as Mean ± Standard Deviation
| Mechanical Epi-Off CXL | tPTK-asst. Epi-off CXL | Wf-Guided tPRK CXL | P Value | |
|---|---|---|---|---|
| Number of eyes | 45 | 39 | 28 | — |
| Laterality | 17 (38)/28 (62) | 15 (38)/24 (62) | 15 (54)/13 (46) | 0.355 |
| Right/left eyes (%) | ||||
| Gender | 31 (69)/14 (31) | 23 (59)/16 (41) | 21 (75)/7 (25) | 0.365 |
| Male/female | ||||
| Age, y | 29.5 ± 10.1 | 29.5 ± 10.7 | 27.0 ± 8.0 | 0.527 |
| K mean, D | 46.4 ± 2.7 | 46.0 ± 2.9 | 45.2 ± 1.8 | 0.205 |
| K max, D | 54.1 ± 4.1 | 53.6 ± 5.3 | 52.6 ± 3.1 | 0.360 |
| TCT, µm | 472 ± 33 | 482 ± 31 | 481 ± 29 | 0.321 |
| A-parameter | 2.1 ± 1.0 | 2.4 ± 1.4 | 1.7 ± 0.7 | 0.088 |
| B-parameter | 3.2 ± 1.3 | 3.8 ± 1.7 | 2.9 ± 1.2 | 0.041 a |
| C-parameter | 1.5 ± 0.8 | 1.7 ± 0.8 | 1.7 ± 0.8 | 0.637 |
A-parameter, stage of anterior curvature of the ABCD grading system; B-parameter, stage of posterior curvature of the ABCD grading system; C-parameter, stage of thinnest corneal thickness of the ABCD grading system; K mean, mean keratometry value of the central 3 mm zone; K max, maximum keratometry; TCT, thinnest corneal thickness.
Statistical significance (P < 0.05) is marked in bold face.
a
Pairwise comparison between all three groups and applied Bonferroni correction did not show any statistical significance among the groups.