Title:Which Metrological Index, the BASMI or EDASMI, is Best Correlated
with Disease-Related Parameters in Spondylarthritis Patients?
Volume: 18
Issue: 3
Author(s): Kaouther Maatallah, Wafa Triki*, Hanene Ferjani, Dorra Ben Nessib, Dhia Kaffel and Wafa Hamdi
Affiliation:
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Rheumatology Department, Mohamed Kassab National Institute of Orthopaedics, La Mannouba, Tunisia
- Research Unit UR17SP04, 2010 Ksar Said, Tunis, Tunisia
Keywords:
Spondyloarthrite, spinal mobility, metrology, BASMI, EDASM, mSASSS.
Abstract:
Objective: This study aimed at comparing the Edmonton Ankylosing Spondylitis Metrology
Index (EDASMI) and Bath Ankylosing Spondylitis Metrology Index (BASMI) to determine
which of the two is best correlated with disease-related parameters in axial spondyloarthritis
(axSpA) patients.
Methods: A cross-sectional study was carried out involving 86 patients with radiographic axSpA.
Sociodemographic data, the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), the
Ankylosing Spondylitis Disease Activity Score (ASDAS), the Bath Ankylosing Spondylitis Functional
Index (BASFI), and the Ankylosing Spondylitis Quality of Life (ASQoL) questionnaire were
applied. Spinal mobility was assessed by two indices: the BASMI and the EDASMI. Structural
damage of the spine was also evaluated by two indices: the Bath Ankylosing Spondylitis Radiology
Index (BASRI) and the modified Stoke Ankylosing Spondylitis Spine Score (mSASSS).
Results: Eighty-six patients with an average age of 43.21 ± 11.43 years (20-79) were included. Impaired
spinal mobility, which corresponds to higher BASMI scores, was correlated with prolonged
disease duration (p < 0.01, r = 0.310), higher ASDAS-CRP (p < 0.001, r = 0.386), severe functional
disability on the BASFI (p < 0.01, r = 0.505) and poorer quality of life according to the ASQoL (p <
0.01, r = 0.369). However, the EDASMI score did not correlate with any disease parameter. The
BASMI was correlated with the total BASRI (p < 0.01, r = 0.634) and mSASSS (p < 0.01, r =
0.388). Unlike the BASMI, the EDASMI was neither correlated with the BASRI (p = 0.520, r =
0.245) nor the mSASSS (p = 0.252, r = -0.120).
Conclusion: Our results indicate that among the studied metrological indices, the BASMI is more
contributory since it is correlated with clinical disease parameters and structural damage, unlike the
EDASMI.