Table 5.

Result of cox proportional hazard analysis for assessing risk factors of surgical failure at different stages of peripheral anterior synechiae.

Variables	PAS less than 50% (n = 46 eyes)				PAS more than 50% (n = 24 eyes)
	Univariate		Multivariate		Univariate
	HR (95% CI)	P value	HR (95% CI)	P value	HR (95% CI)	P value
Preoperative PRP (versus not done)	0.34 (0.08–1.37)	0.130			0.51 (0.12–2.13)	0.354
Presence of NVA (versus absence)	0.39 (0.08–1.90)	0.242			NA∗
IVB group (versus control)	0.29 (0.08–1.10)	0.069			1.19 (0.37–3.81)	0.775
Number of IVB injection (per 1-time injection)	0.39 (0.15–1.06)	0.064	0.39 (0.15–1.06)	0.064	0.91 (0.51–1.61)	0.743
Baseline IOP (mmHg)	1.05 (0.98–1.13)	0.186			1.02 (0.95–1.09)	0.624
Baseline BCVA (LogMAR)	1.05 (0.89–1.88)	0.881			1.25 (0.56–2.78)	0.582

^∗All 24 eyes had NVA. HR = hazard ratio; CI = confidence interval; NVA = neovascularization of angle; PAS = peripheral anterior synechiae; IVB = intravitreal bevacizumab; IOP = intraocular pressure; BCVA = best-corrected visual acuity; MAR = minimal angle of resolution; NA = nonapplicable. Variables with P < 0.10 in univariate analysis were entered into multivariate analysis. Multivariate model using a backward elimination approach based on likelihood ratio; variables were entered in the model if P < 0.05 and removed if P > 0.10 in the saturated multivariate model.