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. Author manuscript; available in PMC: 2014 Dec 18.
Published in final edited form as: Cochrane Database Syst Rev. 2014 Aug 29;8:CD005139. doi: 10.1002/14651858.CD005139.pub3
Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1 Gain of 15 letters or more visual acuity at one year 2 159 Risk Ratio (M-H, Random, 95% CI) 7.80 [2.44, 24.98]
2 Loss of fewer than 15 letters visual acuity at one year 2 159 Risk Ratio (M-H, Random, 95% CI) 1.28 [1.09, 1.50]