ObjectiveTo observe the hemodynamic parameters of retrobulbar vessels of eyes with primary open-angle glaucoma (POAG) by using color Doppler imaging (CDI) technique. Methods Pertinent publications were retrieved from the PubMed of The National Library of Medicine, the ISI Web of Knowledge of The Institute for Scientific Information, and Cochrane Central Register of Controlled Trials. Case control studies involved POAG patients were included. Changes in retrobulbar blood flow parameters including peak systolic velocity (PSV), end diastolic velocity (EDV) and resistive index (RI) of the ophthalmic artery (OA), central retinal artery (CRA) and short posterior ciliary artery (SPCA) were evaluated by CDI. The searching time was from the data base established up to April, 2014. Meta analysis was used on the included articles, the mean difference (MD) along with 95% confidence interval (95% CI) of the blood flow parameters were calculated. ResultsTwenty-four articles were retrieved, including 1336 eyes as cases, 1102 eyes as controls. PSV of POAG eyes was statistically signiflcantly lower than controls in the OA (MD=-3.05, 95%CI:-4.49--1.61, P < 0.001), CRA (MD=-1.66, 95%CI:-1.95--1.38, P < 0.001), SPCA (MD=-0.87, 95% CI:-1.49--0.26, P=0.005). EDV of POAG eyes was statistically significantly reduced than controls in the OA (MD=-1.78, 95%CI:-2.14--1.41, P < 0.001), CRA (MD=-0.95, 95%CI:-1.17--0.74, P < 0.001), SPCA (MD=-0.53, 95%CI:-0.71--0.36, P < 0.001). Statistically significant increases in RI of POAG eyes than controls in the OA (MD=0.04, 95%CI: 0.03-0.05, P < 0.001), CRA (MD=0.06, 95%CI: 0.05-0.07, P < 0.001), SPCA (MD=0.04, 95%CI: 0.03-0.06, P < 0.001). ConclusionThis meta-analysis suggests that significant decreased velocity and increased resistance of retrobulbar blood flow are found in POAG eyes.
ObjectivesTo systematically review the prevalence of depression in the elderly in China.MethodsPubMed, Web of Science, CBM, CNKI, WanFang Data and VIP databases were electronically searched to collect cross-sectional studies on the prevalence of depression of Chinese elderly from January 2010 to July 2019. Two reviewers independently screened literature, extracted data and assessed risk of bias of included studies. Then, meta-analysis was performed by using RevMan 5.3 software.ResultsA total of 22 cross-sectional studies involving 12 656 patients were included. Meta-analysis showed that the overall prevalence of depression in Chinese elderly was 25.55% (95%CI 19.81% to 31.29%). Subgroup analysis showed that the prevalence of females was higher than that of males; the prevalence in the north was higher than that in the south; the prevalence in rural areas was higher than that in cities; the prevalence of CES-D assessment scale was higher than that of GDS-30; the prevalence of depression increased annually of data collection.ConclusionThe prevalence of depression in the elderly (aged 60 years and above) in China is high. More attention should be paid to this situation and more psychological intervention should be provided to the elderly. Due to the limited quantity and quality of the included studies, more high-quality studies are required to verify the above conclusion.