ABSTRACT
Background Diabetiretinopathy(DR) icommon ophthalmivasculadisease which can lead to blindness,and itpathogenesiicomplex.C-peptide iby-producin insulin synthesis,and loof studieindicate thaC-peptide iclosely related with diabetimicrovasculacomplications.Objective Thistudy wato explore the clinical significance of the detection of C-peptide to assesthe prognosiof non-proliferative DR(NPDR).Methodretrospective case-observational study wadesigned.The clinical datof 205 casewith NPDwere collected in Wuhan Puren Hospital from January 1,2009 to January 1,2010.The patientwere diagnosed by fundufluorescein angiography (FFA) and the stageof theidiseasewere determined based on the Dstaging developed by the Chinese Ophthalmological Society fundustudy group.Twenty-seven-month follow-up waperformed fothe patientto record the parameterof theiblood biochemistry,changein theiphysical conditions,and changein theiblood pressure and DM.The patientwere assigned to the PDgroup and NPDgroup athe end of the follow-up.The independenrisk factofoNPDwaanalyzed using the univariate analysis,and multivariate logistiregression analysiwaused to evaluate the correlation of varioufactorwith pooprognosiof NPDR.Receiveoperating characteristi(ROC) curve wadrawn to assesthe prediction efficiency of C-peptide fothe prognosiof NPDR.ResultThe clinical datof 205 patientwith NPDwere reviewed,and 15 patientfailed to show up fovisitarate of 7.3％.One hundred and ninety patientwith NPDfinished follow-up with mean age of (41.54± 8.15)years.Of the 190 patients,69 patient(36.3％) advanced to PDR,and 121 patient(63.7％) were NPDduring the follow-up.Significandifferencewere seen in age,hypertension history,smoking history,DM course and C-peptide levelbetween the PDgroup and PDgroup (age:=13.78,P＜0.05 ; hypertension history:x2 =21.57,P＜0.05 ;smocking history:x2 =26.96,P＜0.05;DM course:t=6.89,P＜0.05;C-peptide:t=20.50,P＜0.05).pooprognosiwacorrelated with age (OR:1.04,95％ CI:1.01-1.07),hypertension history (OR:1.05,95％ CI:1.02-1.08),smokinghistory (OR:1.07,95％CI:1.04-1.11),DM course (0R:1.18,95％CI:1.13-1.25) oC-peptide conten(0R:1.09,95％ CI:1.06-1.12).The areundethe ROcurve wa0.835 (P＜0.05,95％ CI:0.818-0.843) when the C-peptide waincluded,buwalarge than 0.769 (P ＜ 0.05,95％ CI:0.754-0.780) when Cpeptide waexcluded.ConclusionThe levelof blood C-peptide are lowein the PDpatientthan those in the NPDpatients,and the lowelevel of blood C-peptide in the NPDpopulation increasetheirisk of developing PDR.Testing foblood C-peptide level can benefithe prognosiof NPDR.