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Table 3 Corneal epithelial defect (CED) area in arm A (n = 39 bilateral cases) and arm B (n = 33 bilateral cases)

From: Comparison of transepithelial and conventional photorefractive keratectomy in myopic and myopic astigmatism patients: a randomized contralateral trial

  Method Operation day Day 1 Day 2 Day 3 3-day change P-value
Arm A tPRK 54.35 ± 5.26 36.97 ± 9.29 10.55 ± 6.90 1.17 ± 1.85 −55.60 ± 5.78 0.02
mPRK 59.68 ± 7.34* 38.02 ± 8.14 9.06 ± 6.29 0.61 ± 1.32 −61.68 ± 7.61
Arm B tPRK 54.27 ± 4.76 37.34 ± 13.07 11.60 ± 9.10 2.28 ± 4.36 −53.77 ± 7.10 0.16
aaPRK 64.96 ± 6.54** 45.23 ± 7.36* 14.80 ± 6.29 2.67 ± 3.82 −61.27 ± 7.12
  1. tPRK Transepithelial photorefractive keratectomy, mPRK Mechanical PRK, aaPRK Alcohol assisted PRK
  2. Based on three-day change of CED by random mixed-effect model adjusted for correlation of fellow eyes and follow-up times
  3. All data are presented as Mean ± SD (mm2)
  4. Bold values are statistically significant by random mixed-effect model adjusted for correlation of fellow eyes
  5. *P<0.01
  6. **P<0.001