Obstructive sleep apnea (OSA) can cause local and systemic inflammation due to hypoxia, asphyxia, hypercapnia, respiratory acidosis. Searching for new inflammatory markers in OSA may facilitate the prediction of OSA-related conditions. Therefore, we aimed to investigate the relationship between OSA severity and serum gamma‑glutamyl transferase (GGT) levels. In the study, the GGT levels of the patients were compared according to the degree of OSA determined by polysomnography. The patients' demographic, polysomnographic, and laboratory parameters were evaluated with SPSS 25 program. A total of 500 patients, 299 (59.8%) male and 201 (40.2%) female, were included in the study. The mean age of the patients was 47.9±13.1, and body mass index (BMI) was 32.2±6.6. There were 98 (19.6%) patients in the control group, 100 (20%) in the mild OSA group, 103 (20.6%) in the moderate OSA group, and 199 (39.8%) in the severe OSA group. When the BMI and desaturation index of the groups were compared, there was a statistical difference (respectively, p
Key words: Gamma glutamyl transferase, inflammation, body mass index
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