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Anaemia of acute inflammation: a higher acute systemic inflammatory response is associated with a larger decrease in
Colin J Crooks1, Joe West1, Joanne R Morling1
1University of Nottingham, Nottingham, UK.
Insights
Higher inflammation in COVID-19 patients correlated with greater hemoglobin decrease. This suggests anemia of acute inflammation, potentially increasing severe disease risks.
Area of Science:
- Internal Medicine
- Hematology
- Infectious Diseases
Background:
- Investigating the relationship between systemic inflammation and hematological changes in Coronavirus 2019 (COVID-19) patients.
- Understanding the impact of inflammatory markers on hemoglobin levels during COVID-19 infection.
Observation:
- Analysis of data from COVID-19 patients admitted to a UK hospital between February 2020 and December 2021.
- Focus on maximal serum C-reactive protein (CRP) levels as a marker of acute systemic inflammatory response.
Findings:
- A maximal serum CRP level exceeding 175 mg/L was significantly associated with a decrease in blood hemoglobin levels (-5.0 g/L).
- Adjusted analysis indicated that elevated CRP levels correlate with more substantial hemoglobin reduction, even after accounting for covariates like blood draws.
Implications:
- The findings support the hypothesis that a heightened acute systemic inflammatory response in COVID-19 is linked to more pronounced decreases in blood hemoglobin.
- This phenomenon exemplifies anemia of acute inflammation and may represent a mechanism contributing to increased morbidity and mortality in severe COVID-19 cases.
Aims:
The study tests the hypothesis that a higher acute systemic inflammatory response was associated with a larger decrease in blood hemoglobin levels in patients with Coronavirus 2019 (COVID-19) infection.
Methods:
All patients with either suspected or confirmed COVID-19 infection admitted to a busy UK hospital from February 2020 to December 2021 provided data for analysis. The exposure of interest was maximal serum C-reactive protein (CRP) level after COVID-19 during the same admission.
Results:
A maximal serum CRP >175mg/L was associated with a decrease in blood haemoglobin (-5.0 g/L, 95% confidence interval: -5.9 to -4.2) after adjustment for covariates, including the number of times blood was drawn for analysis.Clinically, for a 55-year-old male patient with a maximum haemoglobin of 150 g/L who was admitted for a 28-day admission, a peak CRP >175 mg/L would be associated with an 11 g/L decrease in blood haemoglobin, compared with only 6 g/L if the maximal CRP was <4 mg/L.
Conclusions:
A higher acute systemic inflammatory response is associated with larger decreases in blood haemoglobin levels in patients with COVID-19. This represents an example of anaemia of acute inflammation, and a potential mechanism by which severe disease can increase morbidity and mortality.
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