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. 2008 Dec;2(4):709–716.

Table 2.

Intraoperative and postoperative data

Group 1 PPV Group 2 Avastin + PPV P value (w) P value (chi)
Bleeding frequency (times/surgery)
 mean (SD)/(range) 6.8 (1.5)/(4–9) 1.9 (1.1)/(0–4) <0.0001
Diathermy frequency (times/surgery)
 mean (SD)/(range) 4.6 (1.2)/(2–6) 0.27 (0.46)/(0–1) <0.0001
Surgical time (min.)
 mean (SD)/(range) 93.3 (11.6)/(70–110) 61.6 (14.5)/(40–90) <0.0001
PFCL use, n (%) 8 (53.3) 3 (20)
Relaxing retinotomy, n (%) 4 (26.6) 2 (13.3)
Endotamponade, n (%)
 20% SF6 6 (40) 9 (60)
 Air 0 3 (20)
 Silicone oil 9 (60 ) 3 (20)
VA pre surgery
 mean (± lines)/(range) 0.016 (6.2)/(HM −0.1) 0.01(7.3)/(HM −0.1) P2 < 0.001
VA post surgery (final) P = 0.52
 mean (± lines)/(range) 0.12 (6.7)/(HM −0.5) 0.18 (6.8)/(HM −0.6) P1 = 0.003
VA change, n (%)
 Better 12 (80) 13 (86.6)
 Same 2 (13.3) 2 (13.3)
 Worse 1 (6.7) 0
Primary attachment, n (%) 13 (86.6) 14 (90.3) 1
Subsequent surgeries, n (%)
 Cataract + oil removal 7 (46.7) 3 (20)
 Re-PPV 2 (13.3) 1 (6.7)
Postoperative complications
 Cataract, progressive 7 (46.7) 4 (26.6)
 Cataract, gas-induced 2 (13.3) 3 (20)
 Postoperative bleeding 4 (26.6) 0
 Rubeosis 1 (6.7) 0
 Optic pallor 0 1 (6.7)
 Corneal erosions 5 (33.3) 2 (13.3)

Abbreviations: PPV, pars plana vitrectomy; VA, best corrected visual acuity; ww, Wilcoxon two-sample test; chi, chi square test; P1, preoperative versus final VA in group1; P2, preoperative versus final VA in group 2; P, p value, visual change between the two groups; SD, standard deviation; min, minutes; PFCL, perfluorocarbon liquid.