title: A Multicenter Reference Intervals Study for Specific Proteins in China.
abstract: A multicenter study conducted in healthy population of 6 cities from the 4 corners and central China for 7 serum-specific proteins to identify the sources of variation and establish the reference intervals on 2 automation platforms.A total of 3148 subjects aged 19 to 64 years old were enrolled in this study to ensure at least 120 participants in each 10-year age group and each city. The majority of samples were transported to central laboratory and measured on both Beckman AU5800 and Immage 800 analytical systems. Three-level nested ANOVA, multiple regression analysis, and the scatter plot were used to explore the variations from sex, age, region, BMI, cigarette smoking, and so on. The latent abnormal value exclusion (LAVE) method was applied at the time of computing RIs as a method for secondary exclusion.Regionality was not observed in any of the immunoassay in China. Variations for sex were significant for IgM among the immune analytes. For CRP and hsCRP results with turbidimetry method (Beckman Coulter AU5800) were lower than the nephelometry method (Beckman Immage). The LAVE method did not affect the RIs computed for the majority of analytes except C4, CRP, and hsCRP. In the scatter plot at the age of 45 years old C3, C4, and IgM reached an inflection point, accordingly RIs were separated by the age group.With the lack of regional differences and the well-standardized status of test results, the RIs of C3, IgG, IgA, IgM derived from this nationwide study can be used for the entire Chinese population. C4, CRP, and hsCRP were affected by different platforms and gender was a significant source of variation for IgM, so they had separated RIs.
authors.affiliation: From the Department of Clinical Laboratory, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing (XQ, LQ, PL, LX, SY, XC, JH, LH); Beijing Hospital of the Ministry of Health (GT); Department of Clinical Laboratory, Third Affiliated Hospital of Third Military Medical University, Chongqing (MC); Department of Clinical Laboratory, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou (ZT); Department of Clinical Laboratory, The First Affiliated Hospital of Dalian Medical University, Dalian (SL); Department of Clinical Laboratory, The first Affiliated Hospital, Sun Yat-sen University, Guangzhou (ML); Department of Clinical Laboratory, Xinjiang Medical University, Urumuqi (LW); Department of Clinical Laboratory, Hospital of Beijing Prison Administration Bureau Qinghe Branch, China (SG); and Faculty of Health Sciences, Yamaguchi University Graduate School of Medicine, Ube, Japan (KI).
authors.forename: Xuzhen
authors.initials: X
authors.lastname: Qin
authors.forename: Guodong
authors.initials: G
authors.lastname: Tang
authors.forename: Ling
authors.initials: L
authors.lastname: Qiu
authors.forename: Peng Chang
authors.initials: PC
authors.lastname: Li
authors.forename: Liangyu
authors.initials: L
authors.lastname: Xia
authors.forename: Ming
authors.initials: M
authors.lastname: Chen
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Tao
authors.forename: Shijun
authors.initials: S
authors.lastname: Li
authors.forename: Min
authors.initials: M
authors.lastname: Liu
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.forename: Shang
authors.initials: S
authors.lastname: Gao
authors.forename: Songlin
authors.initials: S
authors.lastname: Yu
authors.forename: Xinqi
authors.initials: X
authors.lastname: Cheng
authors.forename: Jianhua
authors.initials: J
authors.lastname: Han
authors.forename: Li'an
authors.initials: L
authors.lastname: Hou
authors.forename: Reo
authors.initials: R
authors.lastname: Kawano
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Ichihara
mesh_terms: D000328:Adult; D000367:Age Factors; D000428:Alcohol Drinking / Q000453:epidemiology; D001794:Blood Pressure; D001798:Blood Proteins / Q000032:analysis*; D015992:Body Mass Index; D002681:China; D015444:Exercise; D005260:Female; D006403:Hematologic Tests / Q000592:standards*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D012016:Reference Values; D012044:Regression Analysis; D012111:Residence Characteristics; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology; D055815:Young Adult
chemical_list: D001798:Blood Proteins