Risk Factors for Recurrent Vitreous Hemorrhage After 25-Gauge Pars Plana Vitrectomy in Patients With Proliferative Diabetic Retinopathy.

To report the incidence of and risk factors associated with recurrent vitreous hemorrhage (VH) in eyes that had 25-gauge pars plana vitrectomy (PPV) for proliferative diabetic retinopathy (PDR). This study included 220 eyes of 185 patients who were 21 years old or older and who had PPV for PDR and a minimum postoperative follow-up of 3 months. For patients who had bilateral PPV, data were gathered from both eyes. If surgery was performed in only 1 eye, data were collected from that eye alone. The incidence of recurrent VH was 34.5% (76 eyes). The VH was categorized as early in 46 eyes (60.5%), delayed in 8 eyes (10.5%), or late in 22 eyes (28.9%). Sixty-eight eyes (89.5%) had mild/moderate recurrent VH and 8 (10.5%) had severe recurrent VH. The mean preoperative fasting blood glucose level was 147.7 mg/dL in eyes without recurrent VH and 176.7 mg/dL in eyes with recurrent VH ( = .020). Younger age ( = .027) and higher diastolic blood pressure at the time of surgery ( = .005) also significantly affected recurrent VH. Younger age, preoperative fasting blood glucose levels, and diastolic blood pressure were significantly associated with recurrent VH after PPV in patients with PDR.