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Table 2 Comparisons of laboratory parameters in pre and post-TPE procedure

From: Therapeutic plasma exchange in patients with COVID-19 pneumonia in intensive care unit: a retrospective study

  Pre-TPE Post-TPE p
WBC (× 103/μL) 9.08 ± 4.1 9.14 ± 3.5 0.951
Neuc (×103/μL) 7.38 ± 3.1 7.33 ± 3.3 0.953
Lymc (× 103/μL) 0.9 (0.5–1.3) 1.02 (0.77–1.27) 0.053
NLCR 6.8 (1.8–11.7) 6.7 (4.2–9.2) 0.184
LDH (IU/L) 436 (322–550) 239 (181–297) 0.001
d-dimer (mg/L)& 7.8 (2.1–35.2) 1.3 (0.6–3.9) < 0.001
Ferritin (ng/mL)& 1268 (399–6110) 405 (157–1650) 0.001
IL-6 (pq/mL)(13)& 161 (36.2–2958) 24.5 (1.5–130) 0.001
CRP (mg/dL)& 11.8 (0.4–29.7) 0.9 (0.3–7.2) < 0.001
Procalcitonin (ng/mL)& 0.27 (0.02–87) 0.1 (0.01–39) 0.002
  1. CRP C-reactive protein, IL-6 interleukin-6, LDH lactate dehydrogenase, Lymc lymphocyte count, Neuc neutrophil count, NLCR neutrophil-lymphocyte count ratio, TPE therapeutic plasma exchange, WBC white blood cell. Results were given as percentage, mean ± sd, and median (quartiles or min-max). &Minimum and maximum values. Paired sample and Wilcoxon tests were used for the statistical analysis