Table 5.

Univariate and multivariate analysis to evaluate risk factors following Ahmed Glaucoma Valve surgery.

Risk factors	Univariate		Multivariate
Parameters	OR	P value	OR	95% CI	P value
Age (y)
≥60 years	0.98	0.087	0.78	0.28–2.12	0.631
<60 years
Gender
Male	1.3	0.504	1.21	0.46–3.21	0.693
Female
Race
White	5.27	0.001	5.51	2.32–19.06	0.001
African American
Previous glaucoma surgery
Yes	1.01	0.997	1.74	0.44–6.79	0.423
No
Type of glaucoma
Primary open angle	0.46	0.068	0.99	0.26–4.91	0.989
Neovascular glaucoma	1.43	0.444	3.18	0.59–16.80	0.229
Uveitic	7.56	0.075	6.86	0.90–11.10	0.060
Traumatic	1.78	0.489	NA	NA	NA
Congenital	0.33	0.319	NA	NA	NA
Primary angle closure	1.73	0.587	NA	NA	NA
Penetrating keratoplasty	0.41	0.443	NA	NA	NA
Early hypertensive phase
Yes	5.15	<0.001	4.88	1.74–11.60	0.002
No
Type of implant
Ahmed S2	0.55	0.141	0.54	0.20–1.46	0.229
Ahmed FP7

IOP: intraocular pressure, OR: odds ratio, CI: confidence interval, and NA: not applicable.

S2: polypropylene; FP7: silicone.

All analyses were performed using generalized estimating equation.