Risk factors for epiretinal membrane formation and peeling following pars plana vitrectomy for primary rhegmatogenous retinal detachment, an OCT guided analysis

Table 5 Preoperative risk factors for post-operative epiretinal membrane formation and membrane peeling

	Interval	ERM formation				ERM surgery
		Hazard ratio	95% CI		P value	Hazard ratio	95% CI		P value
		Hazard ratio	Lower	Upper	P value	Hazard ratio	Lower	Upper	P value
Female	vs male	0.9	0.5	1.5	0.68	2.3	0.5	11.4	0.31
Left Eye	vs right eye	0.9	0.6	1.5	0.75	0.9	0.2	4.6	0.92
Failed pneumatic	vs no failed pneumatic	1.0	0.6	1.6	0.89	2.0	0.4	10.1	0.38
Retinal detachment greater than 50%	vs 50% or less	1.5	0.9	2.4	0.14	1.5	0.3	9.2	0.64
PVR Grade A or B	vs no PVR	1.2	0.3	5.0	0.77	0.0	0.0	4.1e [9]	0.81
Choroidal detachment*	Vs no choroidal detachment	7.2	1.7	30.7	0.01	0.0	0.0	3.7e [11]	0.84
Cryotherapy*	vs no cryotherapy	2.5	1.3	4.9	0.01	1.8	0.2	15.5	0.59
Laser shots ≥ 1000*	vs laser shots < 1000	2.2	1.3	3.6	0.01	4.6	0.5	44.8	0.18
3 or more tears	vs 2 tears or less	1.2	0.8	2.0	0.37	6.3	0.7	56.0	0.10
Combined cataract surgery	vs no combined cataract surgery	1.1	0.6	2.0	0.77	2.3	0.4	12.4	0.35
Vitreous hemorrhage	vs no vitreous hemorrhage	0.8	0.4	1.9	0.63	0.0	0.0	3541.8	0.58
360° photocoagulation*	vs no 360° photocoagulation	2.0	1.1	3.5	0.02	2.2	0.3	18.9	0.47
Macula off	vs macula on	1.1	0.7	1.8	0.67	3.2	0.4	27.5	0.29

ISSN: 2056-9920