This cohort study suggests that laboratory levels of LDH, CRP, ALT and NEU can be useful in predicting the results of COVID-19 test.

This diagnostic accuracy study sought to determine the accuracy of laboratory parameters in predicting cases with positive RT-PCR for COVID-19. Researchers evaluated 200 cases of potential COVID-19. RT-PCR was positive in 35% cases. Patients with positive RT-PCR had significantly higher neutrophil counts, C-reactive protein, lactate dehydrogenase , aspartate aminotransferase, alanine aminotransferase, and Urea levels in serum.

Patients with positive RT-PCR also had lower white blood cell count and serum albumin levels.

They determined that ALT, CRP, NEU, LDH, and Urea had very good accuracy in predicting cases with positive RT-PCR for COVID-19.