Laboratory Medicine ›› 2023, Vol. 38 ›› Issue (5): 405-412.DOI: 10.3969/j.issn.1673-8640.2023.05.001

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Analysis on the difference of lipoprotein(a) particle concentration and mass concentration in certain disease states

WANG Yang, MO Huifang(), SHEN Ruojian, SHEN Yifeng, WANG Beili, PAN Baishen, GUO Wei   

  1. Department of Clinical Laboratory,Zhongshan Hospital,Fudan University,Shanghai 200032,China
  • Received:2022-09-29 Revised:2023-04-18 Online:2023-05-30 Published:2023-08-07

Abstract:

Objective To analyze the results of lipoprotein(a)[Lp(a)] mass concentration and particle concentration in certain disease states. Methods A total of 581 inpatients from September 2018 to August 2019 in Zhongshan Hospital of Fudan University were enrolled,which included 406 males and 175 females,aged (63.59±14.52) years old. There were 133 cases in coronary heart disease group,76 cases in hepatocarcinoma group,192 cases in diabetes group and 180 cases in chronic kidney disease group. Totally,200 healthy subjects were enrolled as well,which included 125 males and 75 females,aged (61.84±5.50) years old. The particle concentration and mass concentration of Lp(a) were determined,and the correlation and positive rate difference between particle and mass concentration in disease groups and healthy control group were analyzed by Spearman correlation analysis. Passing-Bablok regression analysis and Bland-Altman bias evaluation were used to analyze the consistency between the mass concentration calculated by particle concentration and the mass concentration determined directly. Results The correlation between Lp(a) particle concentration and mass concentration was good(r=0.948 7,P<0.05),the highest in coronary heart disease group(r=0.976 3,P<0.05),and the lowest in hepatocarcinoma group(r=0.863 2,P<0.05). The positive rates of particle concentration and mass concentration in chronic kidney disease group and diabetes group had statistical significance(P<0.05). There was no statistical significance in the positive rates of particle concentration and mass concentration among coronary heart disease group,hepatocarcinoma group and healthy control group(P>0.05). The 95% agreement margin between mass concentration calculated by particle concentration and mass concentration determined directly exceeded 1/2 of the allowable total error. Conclusions There is a certain correlation between the particle concentration of Lp(a) and its mass concentration. In different disease groups(coronary heart disease,hepatocarcinoma,diabetes and chronic kidney disease) and healthy control group,the positive rates between Lp(a) particle and mass concentrations are different. The difference between the mass concentration calculated by particle concentration and mass concentration determined directly exceeds the clinically acceptable range,and it is not recommended to convert the Lp(a) particle concentration and mass concentration in clinical practice.

Key words: Lipoprotein(a), Particle concentration, Mass concentration, Correlation

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