Table 1.

Intraocular Pressure and Medical Therapy at Baseline and Follow-up in the Ahmed Baerveldt Comparison Study^*

	Ahmed Group	Baerveldt Group	P-value†
Baseline
IOP (mm Hg)	31.2 ± 11.2	31.8 ± 12.5	.71
Glaucoma medications	3.4 ± 1.1	3.5 ± 1.1	.34
N	143	133
1 day
IOP (mm Hg)	10.0 ± 7.9	18.6 ± 13.7	< 0.001
N followed (% of baseline)	142 (99%)	130 (98%)
1 week
IOP (mm Hg)	10.6 ± 5.6	17.2 ± 12.0	< 0.001
Glaucoma medications	0.2 ± 0.7	0.9 ± 1.4	< 0.001
N followed (% of baseline)	140 (98%)	118 (89%)
1 month
IOP (mm Hg)	20.7 ± 9.7	18.0 ± 10.0	0.024
Glaucoma medications	0.5 ± 1.0	1.3 ± 1.5	< 0.001
N followed (% of baseline)	139 (97%)	130 (98%)
3 months
IOP (mm Hg)	18.8 ± 8.3	16.7 ± 8.2	0.043
Glaucoma medications	1.4 ± 1.3	1.2 ± 1.3	0.32
N followed (% of baseline)	133 (93%)	125 (94%)
6 months
IOP (mm Hg)	15.7 ± 5.3	14.8 ± 6.8	0.26
Glaucoma medications	1.7 ± 1.4	1.3 ± 1.3	0.012
N followed (% of baseline)	131 (92%)	125 (94%)
1 year
IOP (mm Hg)	15.4 ± 5.5	13.2 ± 6.8	0.007
Glaucoma medications	1.8 ± 1.3	1.5 ± 1.4	0.071
N followed (% of baseline)	132 (92%)	117 (88%)

Data are presented as mean ± standard deviation.

IOP - Intraocular pressure

^*IOP censored after treatment failure by no light perception vision, reoperation for glaucoma, explantation for complication

^†Student t-test