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Objective. To assess the prevalence of obstructive sleep apnoea syndrome (OSAS) in AS patients.

Methods. Thirty-one patients with AS were included in the study. The demographic data, spinal mobility measures and Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) scores were recorded for each patient. All participants underwent one night of sleep recording, which was performed using a polysomnography (PSG). Pulmonary function test (PFT) was performed for all subjects and symptoms of OSAS were questioned.

Results. Seven (22.6%) of 31 AS patients had OSAS according to PSG assessments. The mean BMI, disease duration, BASDAI score, neck circumference and occiput–wall distance were higher in patients with OSAS, but the differences were not significant. The mean ages of patients with OSAS were significantly higher than the patients without OSAS. The …