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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Am J Ophthalmol. 2014 Apr 12;158(1):96–104.e2. doi: 10.1016/j.ajo.2014.04.003

Figure 1.

Figure 1

Percent of subjects showing a substantial gain/loss (≥3 dB) in mean deviation from baseline (evaluated at each visit) and percent of subjects showing sustained gain/loss (validated by the next consecutive visit) over 9 years of follow-up in the Collaborative Initial Glaucoma Treatment Study. Standard error bars were calculated assuming estimates from a binomial distribution. Percent gain was significantly different from percent loss at years 7 and 8 (p-values=0.0053 and 0.0088, respectively; test of equality of binomial proportions). dB=decibel.