目的：研究增生性糖尿病视网膜病变(PDR)行玻璃体切割术(PPV)后发生新生血管性青光眼(NVG)的风险因素。

方法：回顾性研究。收集2015-10/2020-09在沈阳何氏眼科医院行23G PPV治疗且随访至少12mo资料完整的PDR患者。根据患者随访期间是否发生NVG分为两组，比较两组患者术前及术中变量，分析评估NVG发生的累积风险比。

结果：纳入PDR患者151例169眼，平均随访时间18.07±12.55(1～79)mo，其中30眼(17.8%)发生NVG，平均发生NVG时间为PPV术后6.27 ± 4.01(1～17)mo，50%(15眼)的NVG发生在术后5mo内，NVG在术后3、6、12mo的累积风险比分别为4.8%、12.6%、18.1%。多因素逻辑回归分析发现术前最佳矫正视力(OR=3.077， 95%CI：1.203～7.869， P=0.019)、术前虹膜红变(OR=7.897， 95%CI：1.313～47.498， P=0.024)及术前对侧眼发生NVG(OR=22.108， 95%CI：1.562～312.861， P=0.022)是NVG发生的危险因素； 术中视网膜激光数量(OR=0.772， 95%CI：0.666～0.893， P=0.001)是NVG发生的保护因素。

结论：PPV治疗PDR后NVG发生率为17.8%，其中50%患者发生在术后5mo。术前基线视力差、虹膜红变及对侧眼患有NVG的PDR患者在PPV术后易发生NVG，术中充足的视网膜激光光凝有一定的保护作用。PPV治疗PDR后需密切随访1a。

METHODS: The PDR patients who received 23G PPV treatment at Shenyang He Eye Specialist Hospital from October 2015 to September 2020 and were followed up for at least 12mo with complete data were retrospectively collected. The patients were divided into two groups according to the occurrence of NVG during follow-up. The preoperative and intraoperative variables between two groups were compared. The cumulative hazard ratio for NVG was evaluated.

RESULTS: A total of 151 PDR patients(169 eyes)with a mean follow-up of 18.07±12.55(1～79)mo were included, of which 30(17.8%)eyes developed NVG, the mean time of occurrence was 6.27±4.01(1～17)mo, and 50%(15 eyes)of NVG occurred within 5mo after vitrectomy. The cumulative hazard ratios of NVG at postoperative 3, 6 and 12mo were 4.8%, 12.6% and 18.1%, respectively. Multivariate logistic regression analysis showed that preoperative best corrected visual acuity(OR=3.077, 95%CI: 1.203～7.869, P=0.019), preoperative iris rubeosis(OR=7.897, 95%CI: 1.313～47.498, P=0.024), and contralateral NVG(OR=22.108, 95%CI: 1.562～312.861, P=0.022)were risk factors with the occurrence of NVG, while the number of intraoperative retinal laser photocoagulation(OR=0.772, 95%CI: 0.666～0.893, P=0.001)was the protective factor with the occurrence of NVG.

CONCLUSIONS: The incidence of NVG in PDR eyes after PPV was 17.8%, of which 50% occurred within 5mo after surgery. PDR eyes with poor baseline visual acuity, iris rubeosis, and contralateral NVG are prone to postoperative NVG, and sufficient intraoperative retinal laser photocoagulation has a certain protective effect. PDR eyes after PPV should be closely followed up for 1a.