Which of the following laboratory values is NOT directly related to monitoring HIV infection?

HbA1c (glycated hemoglobin) is a marker of long-term blood glucose control used to monitor diabetes mellitus — it reflects average blood glucose over the preceding 2–3 months. It has no role in monitoring HIV disease. HIV monitoring relies on: CD4+ T-cell count (measures immune function; normal is >500 cells/mm3; AIDS is defined as CD4 <200), HIV viral load (HIV RNA copies/mL; guides antiretroviral therapy), and complete blood count (white blood cell count monitors for lymphopenia and opportunistic infection susceptibility). Dental management of HIV patients is guided by CD4 count and viral load.