| PRK-CXL group (n = 40) | PRK group (n = 42) | P b | ||||||
---|---|---|---|---|---|---|---|---|---|
Pre | 6 mon | Δ | P a | Pre | 6 mon | Δ | P a | ||
Peripheral zone | |||||||||
 Post. elevation (μm, BFS) | –4.46 ± 4.37 | –3.72 ± 4.58 | 0.75±1.58 | .005 | –3.79±4.46 | –1.16±4.99 | 2.63±3.24 | <.001 | .001 |
 Post. elevation (μm, BFTE) | –0.38 ± 4.45 | 0.12±4.40 | 0.50±1.35 | .024 | 0.59±4.44 | 2.61±5.22 | 2.02±3.43 | <.001 | .010 |
Central zone | |||||||||
 Post. elevation (μm, BFS) | 4.11±5.80 | 0.23±5.46 | –3.88 ± 4.84 | <.001 | 3.30±7.28 | –2.52 ± 7.01 | –5.82 ± 8.81 | <.001 | .220 |
 Post. elevation (μm, BFTE) | 1.31 ± 6.67 | –2.16 ± 5.32 | –3.47 ± 4.86 | <.001 | –1.26±7.33 | –8.17 ± 7.59 | –6.90 ± 9.90 | <.001 | .049 |
Max. elevation | |||||||||
 Post. elevation (μm, BFS) | 20.28 ± 7.18 | 20.95 ± 7.80 | 0.68±5.34 | .429 | 19.5±7.19 | 22.26 ± 9.64 | 2.69±6.35 | .009 | .124 |
 Post. elevation (μm, BFTE) | 9.10±3.36 | 7.78±4.00 | –1.33±4.08 | .047 | 9.29±3.93 | 10.88±3.51 | 1.60±5.31 | .059 | .007 |