Table 3.

IOP and success rate at 1-year follow-up in young and elderly patients.

	Young patients	Elderly patients	P
No	56	23
Baseline IOP (mm hg)	27.05 ± 3.57	24.63 ± 4.35	0.02∗
IOP at 1 year (mm hg)	18.83 ± 3.12	18.42 ± 2.09	0.59
IOP reduction (mm hg)	8.22 ± 3.11 (30.4%)	6.21 ± 2.09 (25.2%)	0.13
Success rate	71.4% (40/56)	56.5% (13/23)	0.20