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Int J Rheum Dis. 2014 Apr 23. doi: 10.1111/1756-185X.12347. [Epub ahead of print]

Aerobic capacity and its correlates in patients with ankylosing spondylitis.

Author information

  • 1Department of Physical Medicine and Rehabilitation, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.
  • 2School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan.
  • 3Division of Allergy, Immunology and Rheumatology, Chung Shan Medical University Hospital, Taichung, Taiwan.
  • 4Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.
  • 5Graduated Institute of Integrated Medicine, China Medical University, Taichung, Taiwan.
  • 6Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan.
  • 7Department of Allergy, Immunology, and Rheumatology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.
  • 8Department of Chest Medicine, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.

Abstract

AIM:

To evaluate aerobic capacity in patients with ankylosing spondylitis (AS) and determine possible relationships between aerobic capacity, pulmonary function, and disease-related variables.

METHOD:

Forty-two patients with AS and 42 healthy controls were recruited in the study. Descriptive data, disease-related variables (grip strength, lumbosacral mobility, occiput-to-wall distance, chest expansion, finger-to-floor distance, Bath Ankylosing Spondylitis Disease Activity Index, Bath Ankylosing Spondylitis Functional Index (BASFI), Bath Ankylosing Spondylitis Global Score, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) and hemoglobin), and chest and thoracic spine x-rays were collected in each patient with AS. All subjects took standard pulmonary function and exercise tolerance tests, and forced vital capacity (FVC) and aerobic capacity were recorded.

RESULTS:

Both aerobic capacity and FVC in patients with AS were significantly lower than those in normal subjects (P < 0.05). AS patients with BASFI scores of < 3 or BASDI scores of < 4 had a higher aerobic capacity. There was significant correlation between aerobic capacity, vital capacity, chest expansion, Schober's test, cervical range of motion, and BASFI in patients with AS. Neither aerobic capacity nor vital capacity correlated with disease duration, ESR, CRP, and hemoglobin.

CONCLUSIONS:

Significantly reduced aerobic capacity and FVC were observed in patients with AS, and there was significant correlation between aerobic capacity, vital capacity, chest expansion, and BASFI.

© 2014 Asia Pacific League of Associations for Rheumatology and Wiley Publishing Asia Pty Ltd.

KEYWORDS:

aerobic capacity; ankylosing spondylitis; chest expansion; exercise tolerance test; functional ability; pulmonary function

PMID:
24754841
[PubMed - as supplied by publisher]
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