. Author manuscript; available in PMC: 2013 Jul 1.

Published in final edited form as: Ophthalmology. 2012 Apr 25;119(7):1367–1374. doi: 10.1016/j.ophtha.2012.01.054

Table 2.

The number of combined COA participants examined at each annual follow-up visit

Visit Number (months since randomization)	Number of Participants
Baseline	1,418
12	1,300
24	1.264
36	1,218
48	1,173
60	1,144
72	1,094
84	929
96	682

COA - CIGTS – Collaborative Initial Glaucoma Treatment Study; OHTS – Ocular Hypertension Treatment Study; AGIS – Advanced Glaucoma Intervention Study