Forekomsten af neutropeni var ligeledes øget hos de patienter, hvis neutrofiltal, hæmoglobinniveau og serumniveau af vitamin B12 var lavt ved starten af behandlingen med zidovudin.
The incidence of neutropenia was also increased in those patients whose neutrophil counts, haemoglobin levels and serum vitamin B12 levels were low at the start of zidovudine therapy.