Reumatizam
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The aim of the study was to investigate the reliability and the validity of the Croatian version of the Bath Ankylosing Spondylitis Functional Index (BASFI) and Bath Ankylosing Spondylitis Disease Activity index (BASDAI) in patients with ankylosing spondylitis (AS). Patients with established diagnosis of AS participated in the study. Fifty-two and 48 patients were included for the evaluation of BASFI and BASDAI, respectively. ⋯ Also, the correlation was observed for BASFI with spinal mobility in lumbar region and with chest expansion index, and for BASDAI with the level of pain. Our findings indicate that Croatian version ofBASFI and BASDAI is reliable and valid. Therefore, it can be used in clinical research as well as in clinical practice.