Complication   CBVI (N =67) SBVI (N =66)  
Number of Eyes    Percent Number of Eyes    Percent Fisher’s Exact p-value
Hypotony Hypotony 16 24% 12 18% 0.52
Flat anterior chamber 7 10% 6 9% 1.00
Suprachoroidal effusion 4 6% 4 6% 1.00
Suprachoroidal hemorrhage 0 0 1 2% 0.50
Phthisis bulbi 2 3% 1 2% 1.00
Corneal complications Corneal edema 17 25% 21 32% 0.45
Corneal ulcer 1 2% 0 0 1.00
Graft failure 6 9% 5 8% 1.00
Corneal decompensation 2 3% 0 0 0.50
Tube function and placement Tube erosion 2 3% 3 5% 0.68
Tube blockage 2 3% 1 2% 1.00
Tube corneal touch 3 5% 3 5% 1.00
Tube iris touch 3 5% 3 5% 1.00
Other Irido-corneal touch 1 2% 8 12% 0.02
Peripheral anterior synechiae 1 2% 4 6% 0.37
Cataract  3 5% 1 2% 0.62
Central macular edema 1 2% 0 0 1.00
Hyphema 1 2% 4 6% 0.21
Retinal detachment 1 2% 1 2% 1.00
Vitreous hemorrhage 5 8% 1 2% 0.21
CBVI: Complete BVI; SBVI: Staged (two-stage) BVI
Table 3: Post-Surgical Complications.