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Table 2 Intraoperative patient characteristics, failure to cure, and postoperative complications following pars-plana vitrectomy for rhegmatogenous retinal detachment

From: Risk factors for epiretinal membrane formation and peeling following pars plana vitrectomy for primary rhegmatogenous retinal detachment, an OCT guided analysis

Characteristic

Total (n = 119)

Combined cataract surgery, n (%)

20

16.8%

Duration of surgery (mins), mean (SD)

71.9

23.9

Number of tears, mean (SD)

2.6

1.8

 One, n (%)

40

33.6%

 Two, n (%)

29

24.4%

 Three, n (%)

13

10.9%

 Four or more, n (%)

32

26.8%

Location of tear, n (%)

 Supero-temporal

65

54.6%

 Supero-nasal

38

31.9%

 Infero-nasal

30

25.2%

 Infero-temporal

40

33.6%

Number of laser shots, mean (SD)

969.8

519.0

 Q1

550

 

 Q2

843

 

 Q3

1323

 

 Q4

1776

 

Intraoperative 360° Photocoagulation, n (%)

84

70.6%

Intraoperative ILM peeling, n (%)

0

0.0%

Intraoperative cryotherapy, n (%)

14

11.8%

Failure to cure and postoperative complications

ERM formation, n (%)

69

58.0%

 Stage 1

56

47.1%

 Stage 2

9

7.6%

 Stage 3

3

2.5%

 Stage 4

1

0.8%

Reoperation for ERM

6

5.0%

Mean time to reoperation for ERM, days (SD)

488

351

PVR Grade C, n (%)

2

1.7%

Re-detachment, n (%)

2

1.7%

Macular hole, n (%)

4

3.4%

 Full thickness, n (%)

2

1.7%

 Lamellar, n (%)

2

1.7%

Severe macular edema a *, n (%)

1

0.8%

Subretinal perflurocarbon, n (%)

1

0.8%

  1. SD standard deviation, Q quartile, ILM internal limiting membrane, ERM epiretinal membrane, PVR proliferative vitreoretinopathy
  2. a *Severe macular edema defined as central foveal thickness greater than 400um with no ERM or tractional component present