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. 2020 Aug 27;2020(8):CD008213. doi: 10.1002/14651858.CD008213.pub3

Comparison 7. Trabeculotomy‐trabeculectomy versus Ahmed valve implantation.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
7.1 Mean IOP after surgery 1   Mean Difference (IV, Fixed, 95% CI) Subtotals only
7.1.1 1 year after surgery 1 66 Mean Difference (IV, Fixed, 95% CI) 0.70 [‐0.05, 1.45]
7.1.2 > 1 year (4 years) 1 66 Mean Difference (IV, Fixed, 95% CI) 0.30 [‐1.33, 1.93]
7.2 Proportion with postoperative IOP ≤ 21 mmHg (surgical success) with or without glaucoma medications 1   Risk Ratio (M‐H, Fixed, 95% CI) Subtotals only
7.2.1 1 year after surgery 1 66 Risk Ratio (M‐H, Fixed, 95% CI) 1.00 [0.92, 1.09]
7.2.2 > 1 year (4 years) 1 66 Risk Ratio (M‐H, Fixed, 95% CI) 0.91 [0.63, 1.31]
7.3 Mean corneal diameter 1   Mean Difference (IV, Fixed, 95% CI) Subtotals only
7.3.1 6 months or any time point < 1 year (not specified) 1 66 Mean Difference (IV, Fixed, 95% CI) 0.10 [‐0.26, 0.46]
7.4 Mean axial length 1   Mean Difference (IV, Fixed, 95% CI) Subtotals only
7.4.1 1 year after surgery 1 66 Mean Difference (IV, Fixed, 95% CI) 0.00 [‐0.39, 0.39]
7.4.2 > 1 year (4 years) 1 66 Mean Difference (IV, Fixed, 95% CI) 0.00 [‐0.39, 0.39]
7.5 Mean number of glaucoma medications needed after surgery. We did not consider the use of glaucoma medications to maintain IOP as surgical failure if the IOP was ≤ 21 mmHg. 1 66 Mean Difference (IV, Fixed, 95% CI) ‐0.10 [‐0.27, 0.07]
7.5.1 > 1 year (specify) 1 66 Mean Difference (IV, Fixed, 95% CI) ‐0.10 [‐0.27, 0.07]
7.6 Adverse outcomes 1   Risk Ratio (M‐H, Fixed, 95% CI) Subtotals only
7.6.1 Hyphema 1 66 Risk Ratio (M‐H, Fixed, 95% CI) 3.00 [1.23, 7.30]
7.6.2 Lost anterior chamber 1 66 Risk Ratio (M‐H, Fixed, 95% CI) 1.50 [0.27, 8.40]
7.6.3 Choroidal effusion 1 66 Risk Ratio (M‐H, Fixed, 95% CI) 1.50 [0.27, 8.40]