Journal of Ophthalmology

Research Article

Outcomes of Anterior Chamber, Sulcus, and Pars Plana Glaucoma Drainage Device Placement in Glaucoma Patients

Table 7

Hazard ratios from univariate Cox proportional hazard models using demographic and preoperative data^a.


Univariate model parameters	IOP reduction ≥20% with 5<IOP ≤21 mmHg
Univariate model parameters	HR (95% CI)	value

Age	0.994 (0.956–1.035)	0.8
Sex (female)		0.4
Male	1.590 (0.551–4.588)	0.4

Glaucoma stage (indeterminate)		0.5
Mild	<0.001 (0–Inf)
Moderate	0.900 (0.100–8.090)
Severe	0.407 (0.052–3.217)

Race^b		-
Family history of glaucoma (no)		0.2
Yes	0.504 (0.158–1.610)	—
Diagnosis^b	—

History of CPC (no)		0.1
Yes	2.492 (0.834–7.443)	0.1

Type of glaucoma implant (AGI)		0.4
BGI	0.658 (0.228–1.896)	0.4

Preoperative IOP	0.594 (0.489–0.721)	<0.001
Preoperative medication burden	0.948 (0.572–1.57)	0.8
Tube location (AC)		0.2
Sulcus	3.727 (0.721–19.27)	—
Pars plana	4.369 (0.9029–21.14)

IOP = intraocular pressure; mmHg = millimeters of mercury; HR = hazard ratio; CI = confidence interval; Inf = infinity; CPC = cyclophotocoagulation; AGI = Ahmed glaucoma implant; BGI = Baerveldt glaucoma implant; AC = anterior chamber. ^aHazard ratios and significance were calculated using univariate Cox proportional hazard models. ^bThe model was not able to estimate a hazard ratio for this variable due to lack of sufficient sample size in each of its categories.