Abstract：
INTRODUCTION AND OBJECTIVES:Common laboratory parameters are crucial in aiding coronavirus disease 2019 (COVID-19) case detection. This study aimed to determine the differences between laboratory parameters in (1) COVID-19 versus non-COVID-19 pneumonia, and (2) severe versus non-severe COVID-19 cases. METHODS:Studies were collected until March 2020, and retrieved parameters include leukocyte, neutrophil, thrombocyte, and lymphocyte counts in addition to C-reactive protein (CRP), procalcitonin (PCT) and D-dimer levels. In the presence of heterogeneity, the random-effect model (REM) was used instead of the fixed-effect model (FEM). RESULTS:Seven studies in the first analysis showed significantly lower leukocyte, neutrophil and platelet counts in COVID-19 pneumonia (SMD=-0.42, 95%CI -0.60 to -0.25, p<0.00001, SMD=-0.23, 95%CI -0.41 to -0.06, p=0.01, SMD=-0.54, 95%CI -0.91 to -0.16, p=0.0005) compared to non-COVID-19 pneumonia. Twenty-six studies in the second analysis showed significantly lower lymphocyte and thrombocyte counts (SMD=-0.56, 95%CI -0.71 to -0.40, p<0.0001, SMD=-0.32, 95%CI -0.49 to -0.15, p=0.0002) and significantly higher leukocyte, neutrophil, D-dimer, and CRP (SMD=0.31, 95%CI 0.07-0.56, p=0.01; SMD=0.44, 95%CI 0.24-0.64, p<0.0001; SMD=0.53, 95%CI 0.31-0.75, p<0.00001; SMD=0.97, 95%CI 0.70-1.24, p<0.00001) in severe COVID-19 compared to non-severe COVID-19. CONCLUSIONS:In conclusion, thrombocyte count is key in both diagnosis and prognosis. Low leukocyte and neutrophil counts are markers of COVID-19 infection, but contrastingly higher counts indicate progressive COVID-19. And although lymphocyte, D-dimer and CRP levels did not demonstrate diagnostic value, all indicate severity of COVID-19. Confirmation of these findings should be performed in future studies.
journal_name
Med Clin (Barc)journal_title
Medicina clinicaauthors
Soraya GV,Ulhaq ZSdoi
10.1016/j.medcli.2020.05.017subject
Has Abstractpub_date
2020-08-28 00:00:00pages
143-151issue
4eissn
0025-7753issn
1578-8989pii
S0025-7753(20)30344-4journal_volume
155pub_type
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