Physical activity in patients with Ankylosing Spondylitis: validity and reliability of physical activity questionnaires and associations with clinical outcome.

Hofman, M. (Marianne) (2010) Physical activity in patients with Ankylosing Spondylitis: validity and reliability of physical activity questionnaires and associations with clinical outcome. thesis, Human Movement Sciences.

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Abstract

Objectives. This is the first study that investigates the usefulness of physical activity questionnaires in Ankylosing Spondylitis (AS) population studies. The aims of the study were to investigate the criterion validity and test-retest reliability of the International Physical Activity Questionnaire (IP AQ) and the Short QUestionnaire to Asses Health-enhancing physical activity (SQUASH), as well as to investigate associations between daily physical activity (measured by IP AQ, SQUASH and accelerometer outcome) and clinical assessments of disease activity, physical function and spinal mobility in AS patients. Methods. 91 Dutch AS outpatients were included. In a 9-day study protocol, patients completed IP AQ and SQUASH on the first and ninth day. In between, patients wore the ActiGraph Accelerometer for a 7-day period for validation purposes. Furthermore, clinical assessments were assessed on day 1. Results. Pearson and Spearman correlations between accelerometer outcome and IP AQ and SQUASH total activity scores were 0.45 and 0.35, respectively. Intraclass correlations between first and second assessments of IPAQ and SQUASH were 0.71 and 0.65, respectively. However, Bland-Altman analysis showed the presence of systematic bias between these assessments. Significant correlations were found between outcomes of IP AQ, SQUASH, accelerometer and clinical assessments of physical function and spinal mobility. Accelerometer outcome was also significantly correlated with assessments of disease activity. Conclusions. Both IPAQ and SQUASH had moderate validity in AS patients and were associated with assessments of physical function and spinal mobility. Before these questionnaires can be used in AS population studies, further investigation is needed into the test-retest reliability of both questionnaires.

Item Type:	Thesis (Thesis)
Supervisor name:	Arends, Drs. S. and Kamsma, Dr. Y.P.T. and Brouwer, Dr. E.
Faculty:	Medical Sciences
Date Deposited:	25 Jun 2020 11:04
Last Modified:	25 Jun 2020 11:04
URI:	https://umcg.studenttheses.ub.rug.nl/id/eprint/2402

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