Heping Wang1, Jiashu Guo1, Shanshan Tao2, Xinyu Wang3, Xinshu Liu1, Tingting Li1, Jue Wang1, Xue Yang1, Tongtong Niu4, Dongning Liu5. 1. Department of Ophthalmology, The Fourth Hospital of Shenyang, Shenyang, 110031, Liaoning, People's Republic of China. 2. Company, Chengdu Kanghong Biotechnology Inc, Chengdu, 610091, Sichuan, People's Republic of China. 3. China Medical University, Shenyang, 110122, Liaoning, People's Republic of China. 4. Department of Ophthalmology, The Fourth Hospital of Shenyang, Shenyang, 110031, Liaoning, People's Republic of China. ntt15840566565@163.com. 5. Department of Ophthalmology, The Fourth Hospital of Shenyang, Shenyang, 110031, Liaoning, People's Republic of China. liudongning1976@126.com.
Abstract
INTRODUCTION: The evidence on efficacy of intravitreously administered Conbercept (IVC) monotherapy for diabetic macular degeneration was still limited. METHODS: A systematic review was conducted in November 2019 to summarize the current evidence on visual acuity (VA) changes with IVC monotherapy in the treatment of diabetic macular edema (DME) from Pubmed, ClinicalTrials.gov, EMbase, China National Knowledge Infrastructure (CNKI), Wanfang Database, Chin VIP Information (VIP), and Chinese Biomedical Database (CBM). Retrospective or prospective clinical studies which used IVC injection for the treatment of DME were included. Outcomes included in the analysis were change in best-corrected visual acuity (BCVA) and central macular thickness (CMT). A meta-regression was conducted to assess 1-year BCVA and CMT changes against numbers of injections. RESULTS: A total of 20 studies were included in current study. At 12-month follow-up, an overall increase of 0.67 logarithm of the minimum angle of resolution (logMAR) BCVA score [95% confidence interval (CI) 0.24-1.11; P = 0.003] and 1.03 Early Treatment Diabetic Retinopathy Study (ETDRS) letters (95% CI 0.69-1.38; P < 0.001) was shown with IVC injection compared to baseline. Decrease in CMT was 142.79 μm (95% CI 112.71-172.87; P < 0.001) compared to baseline. The meta-regression showed a significant increase in effect size between number of injections and 12-month logMAR BCVA scale change as well as CMT. CONCLUSION: Our findings suggest improved VA and CMT outcomes during 1-year follow-up in patients with DME who underwent IVC monotherapy. Increased injection frequency demonstrates a significant trend with improved outcomes at 12 months.
INTRODUCTION: The evidence on efficacy of intravitreously administered Conbercept (IVC) monotherapy for diabetic macular degeneration was still limited. METHODS: A systematic review was conducted in November 2019 to summarize the current evidence on visual acuity (VA) changes with IVC monotherapy in the treatment of diabetic macular edema (DME) from Pubmed, ClinicalTrials.gov, EMbase, China National Knowledge Infrastructure (CNKI), Wanfang Database, Chin VIP Information (VIP), and Chinese Biomedical Database (CBM). Retrospective or prospective clinical studies which used IVC injection for the treatment of DME were included. Outcomes included in the analysis were change in best-corrected visual acuity (BCVA) and central macular thickness (CMT). A meta-regression was conducted to assess 1-year BCVA and CMT changes against numbers of injections. RESULTS: A total of 20 studies were included in current study. At 12-month follow-up, an overall increase of 0.67 logarithm of the minimum angle of resolution (logMAR) BCVA score [95% confidence interval (CI) 0.24-1.11; P = 0.003] and 1.03 Early Treatment Diabetic Retinopathy Study (ETDRS) letters (95% CI 0.69-1.38; P < 0.001) was shown with IVC injection compared to baseline. Decrease in CMT was 142.79 μm (95% CI 112.71-172.87; P < 0.001) compared to baseline. The meta-regression showed a significant increase in effect size between number of injections and 12-month logMAR BCVA scale change as well as CMT. CONCLUSION: Our findings suggest improved VA and CMT outcomes during 1-year follow-up in patients with DME who underwent IVC monotherapy. Increased injection frequency demonstrates a significant trend with improved outcomes at 12 months.