ABSTRACT Objective: To investigate whether the lactate dehydrogenase to albumin ratio can be used as a parameter to determine disease severity in Behçet's disease, an inflammatory disease, by comparing it to healthy controls.

Patients and Methods: In this retrospective cohort study, patients with Behçet's disease aged 18-69 years who presented to the outpatient clinic between February 2020 and April 2023 and healthy individuals of similar age and gender were enrolled. LDH, albumin levels, and LDH/albumin ratio of both groups were compared. Clinical findings and characteristics of Behçet's patients and disease severity were recorded and analyzed in relation to LDH/albumin ratio.

Inclusion Criteria:

Patients with Behçet's disease aged 18-69

Exclusion Criteria:

• younger than 18 years or older than 69 years, pregnant and lactating patients, patients with acute infection on admission or nutritional problems, symptomatic gastrointestinal symptoms, malignancy, hepatitis or liver disease were excluded.

A total of 349 subjects, including 160 patients with Behçet's disease and 189 healthy controls