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Table 2 Comparison of clinical outcomes between PTK and control group

From: Effects of excimer laser phototherapeutic keratectomy in limbal-conjunctival autograft transplantation for recurrent pterygium: a retrospective case control study

 

PTK (N = 39)

Control (N = 60)

p value

Corneal invasion length

4.2 ± 1.12

3.49 ± 1.26

0.006*

ΔLogMAR

0.18 (0.12,0.38)

0.06 (0.00,0.18)

0.000§

ΔSAI

0.53 (0.22,2.31)

0.48 (0.22,0.60)

0.005§

ΔSRI

0.53 (0.07,1.61)

0.27 (0.08,0.59)

0.016§

ΔCylinder

2.08 (0.76,3.09)

0.71 (0.22,1.56)

0.000§

Unhealed epithelium on POD4

2.56% (1/39)

13.3% (8/60)

0.084†

Under-graft bleeding

7.69% (3/39)

3.33% (2/60)

0.380†

Graft edema

2.56% (1/39)

1.67% (1/60)

0.628†

Recurrence rate

10.3% (4/39)

13.3% (8/60)

0.759†

Recurrence interval (month)

3.13 ± 2.68

2.88 ± 1.86

0.590*

  1. * two-tailed t test; § Mann-Whitney U test; † Fisher’s exact test
  2. For corneal invasion length and recurrence interval, data were displayed as mean ± SD; for ΔLogMAR, ΔSAI, ΔSRI, ΔCylinder, data were displayed as median (range); for unhealed epithelium on POD4, under-graft bleeding, graft edema and recurrence rate, data were displayed as percentage (number). p-values less than 0.05 are considered significant and highlighted in bold
  3. PTK Excimer laser phototherapeutic keratectomy, SAI Surface asymmetry index, SRI Surface regularity index, POD Postoperative day, ΔLogMAR was defined as the difference between preoperative and postoperative (6 months) LogMAR visual acuity; ΔSAI/ΔSRI was defined as the difference between preoperative and postoperative (6 months) SAI/SRI; Δcylinder was defined as the difference between preoperative and postoperative (6 months) cylinder
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BMC Ophthalmology

ISSN: 1471-2415

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