. Author manuscript; available in PMC: 2015 Aug 1.

Published in final edited form as: Ophthalmology. 2014 Apr 24;121(8):1547–1557.e1. doi: 10.1016/j.ophtha.2014.01.036

Table 2.

Reasons for Treatment Failure in the Ahmed Baerveldt Comparison Study were different by treatment group

	Ahmed Group	Baerveldt Group
Inadequate IOP control without additional glaucoma surgery	18 (42)	15 (38)
Reoperation to lower IOP	16 (37)	7 (18)
Explantation for complication	3 (7)	4 (10)
Persistent hypotony^*	1 (2)	5 (13)
Loss of light perception	5 (12)	9 (23)
Total	43	40

Data are presented as number (percentage of the total number of failures in each respective treatment allocation group). P = 0.109 (Fisher exact).

There were significantly more failures for IOP elevation and reoperation to lower IOP than other causes of failure (p=0.034)

IOP = intraocular pressure

IOP ≤ 5 mm Hg at 2 consecutive visits after 3 months