Journal
JOURNAL OF CLINICAL EPIDEMIOLOGY
Volume 56, Issue 12, Pages 1163-1169Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0895-4356(03)00220-8
Keywords
reproducibility; relative validity; questionnaire; physical activity; accelerometer; guideline
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Objective: The purpose of this study is to determine reproducibility and relative validity of the Short QUestionnaire to ASsess Health-enhancing physical activity (SQUASH). Methods: Participants (36 men and 14 women, aged 27-58) were asked to complete the SQUASH twice with an inbetween period of approximately 5 weeks. In addition, participants wore the Computer Science and Applications (CSA) Activity Monitor for a 2-week period following the first questionnaire. Results: The Spearman correlation for overall reproducibility of the SQUASH was 0.58 (95%-CI 0.36-0.74). Correlations for the reproducibility of the separate questions varied between 0.44 and 0.96. Spearman's correlation coefficient between CSA readings and the total activity score was 0.45 (95%-CI 0.17-0.66). Conclusion: In conclusion, the SQUASH is a fairly reliable and reasonably valid questionnaire and may be used to order subjects according to their level of physical activity in an adult population. Because the SQUASH is a short and simple questionnaire, it may proof to be a very useful tool for the evaluation of health enhancing physical activity in large populations. (C) 2003 Elsevier Inc. All rights reserved.
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