Is there an association between mIDkIne levels and the prognosis of COVID-19 disease?

   The objective was aimed to measure plasma midkine (MK)* levels in patients with COVID-19 and assess its clinical significance.
   Materials and Methods. 88 patients observed in our hospital with a diagnosis of COVID-19 were included in the study. The patients’ demographic characteristics, clinical, and laboratory data were studied, and the relationship between MK levels, prognosis, and other parameters was investigated.
   Results. Of the 88 patients included in the study, 43 (48.9 %) were female and 45 (51.1%) were male. 24 (27%) patients died. The mean age of non-survivors was 70 ± 12.3 years and the survivors were 61.9 ± 18.2 years. Mortality predictors such as D-dimer, ferritin, troponin, LDH, CRP, and procalcitonin were significantly higher in non-survivors than in survivors (p < 0.05). The median MK level (IR) was 152.5 ± 125 pg/ml in all patients, 143 ± 149 pg/ml in survivors, and 165.5 ± 76 pg/ml in non-survivors (p = 0.546). The difference between these two groups was not statistically significant. The area under the ROC curve was found to be 0.542 (95% CI 0.423–0.661, p = 0.546).

   Conclusion. MK is not a biomarker that can replace or reinforce known predictors of mortality in COVID-19 patients.

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