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Table 3 Twelve-month postoperative outcome

From: Comparison of surgical outcomes of trabeculectomy, Ahmed shunt, and Baerveldt shunt in uveitic glaucoma

  Total Trabeculectomy Ahmed Baerveldt p value
  n = 115 eyes n = 11 eyes n = 17 eyes n = 87 eyes  
IOP (mmHg), M (range) 12 (4–38) 10 (5–38) 14 (6–27) 12 (4–38) 0.19*
Visual acuity (logMAR) M (range) 0.6 (0–3) 0.2 (0–1) 0.5 (0–3) 0.7 (0–3) 0.097*
Number of topical glaucoma medications, M (range) 2 (0–4) 0 (0–4) 2 (0–4) 2 (0–4) 0.22*
On systemic glaucoma medications, % (n) 5 (6) 9 (1) 6 (1) 4 (4) 0.59
Number of topical anti-inflammatory medications, M (range) 1 (0–2) 1 (0–2) 1 (0–2) 1 (0–2) 0.69*
On systemic immunosuppressants, % (n) 5 (6) 9 (1) 6 (1) 4 (4) 0.59
IOP reduction (mmHg), M (range) 22 (10–76) 22 (10–39) 24 (11–46) 21 (8–76) 0.62*
% IOP reduction, M (range) 66 (− 38–89) 69 (36–82) 67 (29–86) 65 (38–89) 0.76*
Change in visual acuity (logMar), M (range) 0 (− 3–2) − 0.3 (− 1–0.2) 0 (−1–2) 0 (− 3–2) 0.48*
Lost > 2 lines in visual acuity, % (n) 33 (38) 36 (4) 41 (7) 31 (27) 0.70§
Cataract surgery during follow up period, % (n) 13 (15) 0 (0) 6 (1) 16 (14) 0.35
Failure, % (n) 7.5 (11) 18 (3) 23 (5) 3 (3) 0.0015
  1. Further pairwise comparison showed a significant difference in 6 months IOP in Ahmed versus trabeculectomy (p = 0.02) and Ahmed versus Baerveldt (p = 0.0086). There was no significant difference in 6 months IOP between trabeculectomy versus Baerveldt (p = 0.32)
  2. Failure was defined as postoperative intraocular pressure greater than 21 mmHg or less than 5 mmHg, < 20% IOP reduction, reoperation, or loss of light perception
  3. IOP intraocular pressure, logMAR logarithm of minimum angle of resolution
  4. *Kruskal-Wallis test; Fisher’s exact test; §chi-squared test