丙型肝炎患者核酸定量检测与抗体水平相关性研究

目的分析丙型肝炎患者核酸定量检测(HCV-RNA)与抗体水平的相关性。方法研究共纳入104例丙肝患者,对HCV抗体水平与HCV病毒载量进行相关性分析,根据HCV病毒载量水平升高与否分组,比较两组间HCV抗体水平差异有无统计学意义。双侧P值<0.05认为差异有统计学意义。结果HCV抗体水平与HCV病毒载量呈正相关(r=0.466),HCV病毒载量正常组与升高组HCV抗体水平(S/CO值)分别为5.70±1.96 vs. 12. 84±2.76(t=-8. 350,P=0.001),当cut-off值为9. 88时,ROC曲线下面积达到最大值(AUC=0. 868),其灵敏度与特异性分别为94. 12%及73.56%。结论HCV抗体水平与HCV病毒载量呈正相关,在临床工作中,当HCV抗体水平处于较高水平时,HCV病毒载量往往也会升高,HCV抗体水平可赋予更多的临床应用价值

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^