Radha Das1, Rebecca Kerr1, Usha Chakravarthy1, Ruth E Hogg2. 1. Center for Experimental Medicine, Institute of Clinical Science, Queen's University Belfast, Belfast, Ireland. 2. Center for Experimental Medicine, Institute of Clinical Science, Queen's University Belfast, Belfast, Ireland. Electronic address: r.e.hogg@qub.ac.uk.
Abstract
TOPIC: A systematic review and meta-analysis of dyslipidemia and diabetic macular edema (DME). CLINICAL RELEVANCE: Diabetic macular edema causes impairment of vision in patients with diabetes, and dyslipidemia has been reported as a risk factor for its development. A systematic review with a meta-analysis was undertaken to examine the evidence of an association between dyslipidemia and DME. METHODS: We defined eligibility criteria as randomized controlled trials (RCTs) and cohort, case-control, and cross-sectional studies reporting on the relationship between blood lipid levels and DME. We performed a literature search in MEDLINE, PubMed, and Embase from inception to September 2014. We used the Newcastle-Ottawa scale to assess the quality of case-control, cross-sectional, and cohort studies, and the Cochrane risk of bias tool for RCTs. RESULTS: The search strategy identified 4959 publications. After screening, we selected 21 articles for review (5 cross-sectional, 5 cohort, 7 case-control, and 4 RCTs). Meta-analysis of case-control studies revealed that mean levels of total serum cholesterol (TC), low-density lipoproteins (LDLs), and serum triglycerides (TGs) were significantly higher in patients with DME compared with those without DME (TC: 30.08; 95% confidence interval [CI], 21.14-39.02; P < 0.001; LDL: 18.62; 95% CI, 5.80-31.43; P < 0.05; TG: 24.82; 95% CI, 9.21-40.42; P < 0.05). Meta-analysis of RCTs did not show significant risk in worsening of hard exudates and severity of DME in the lipid-lowering group compared with placebo (hard exudates: relative risk, 1.00; 95% CI, 0.47-2.11; P = 1.00; DME: relative risk, 1.18; 95% CI, 0.75-1.86; P = 0.48). CONCLUSIONS: Despite evidence from the cohort studies and meta-analysis of the case-control studies suggesting a strong relationship between lipid levels and DME, this was not confirmed by the meta-analysis that included only prospective RCTs. Therefore, given the significant public health relevance of the topic, the relationship between lipid levels and DME deserves further investigation.
TOPIC: A systematic review and meta-analysis of dyslipidemia and diabetic macular edema (DME). CLINICAL RELEVANCE: Diabetic macular edema causes impairment of vision in patients with diabetes, and dyslipidemia has been reported as a risk factor for its development. A systematic review with a meta-analysis was undertaken to examine the evidence of an association between dyslipidemia and DME. METHODS: We defined eligibility criteria as randomized controlled trials (RCTs) and cohort, case-control, and cross-sectional studies reporting on the relationship between blood lipid levels and DME. We performed a literature search in MEDLINE, PubMed, and Embase from inception to September 2014. We used the Newcastle-Ottawa scale to assess the quality of case-control, cross-sectional, and cohort studies, and the Cochrane risk of bias tool for RCTs. RESULTS: The search strategy identified 4959 publications. After screening, we selected 21 articles for review (5 cross-sectional, 5 cohort, 7 case-control, and 4 RCTs). Meta-analysis of case-control studies revealed that mean levels of total serum cholesterol (TC), low-density lipoproteins (LDLs), and serum triglycerides (TGs) were significantly higher in patients with DME compared with those without DME (TC: 30.08; 95% confidence interval [CI], 21.14-39.02; P < 0.001; LDL: 18.62; 95% CI, 5.80-31.43; P < 0.05; TG: 24.82; 95% CI, 9.21-40.42; P < 0.05). Meta-analysis of RCTs did not show significant risk in worsening of hard exudates and severity of DME in the lipid-lowering group compared with placebo (hard exudates: relative risk, 1.00; 95% CI, 0.47-2.11; P = 1.00; DME: relative risk, 1.18; 95% CI, 0.75-1.86; P = 0.48). CONCLUSIONS: Despite evidence from the cohort studies and meta-analysis of the case-control studies suggesting a strong relationship between lipid levels and DME, this was not confirmed by the meta-analysis that included only prospective RCTs. Therefore, given the significant public health relevance of the topic, the relationship between lipid levels and DME deserves further investigation.
Authors: Lucia Sobrin; Yong He Chong; Qiao Fan; Alfred Gan; Lynn K Stanwyck; Georgia Kaidonis; Jamie E Craig; Jihye Kim; Wen-Ling Liao; Yu-Chuen Huang; Wen-Jane Lee; Yi-Jen Hung; Xiuqing Guo; Yang Hai; Eli Ipp; Samuela Pollack; Heather Hancock; Alkes Price; Alan Penman; Paul Mitchell; Gerald Liew; Albert V Smith; Vilmundur Gudnason; Gavin Tan; Barbara E K Klein; Jane Kuo; Xiaohui Li; Mark W Christiansen; Bruce M Psaty; Kevin Sandow; Richard A Jensen; Ronald Klein; Mary Frances Cotch; Jie Jin Wang; Yucheng Jia; Ching J Chen; Yii-Der Ida Chen; Jerome I Rotter; Fuu-Jen Tsai; Craig L Hanis; Kathryn P Burdon; Tien Yin Wong; Ching-Yu Cheng Journal: Diabetes Date: 2017-09-26 Impact factor: 9.461