Characteristics of control group participants who increased their physical activity in a cluster-randomized lifestyle intervention trial

Waters, Lauren A., Reeves, Marina M., Fjeldsoe, Brianna S. and Eakin, Elizabeth G. (2011) Characteristics of control group participants who increased their physical activity in a cluster-randomized lifestyle intervention trial. BMC Public Health, 11 27.1-27.9. doi:10.1186/1471-2458-11-27


Author Waters, Lauren A.
Reeves, Marina M.
Fjeldsoe, Brianna S.
Eakin, Elizabeth G.
Title Characteristics of control group participants who increased their physical activity in a cluster-randomized lifestyle intervention trial
Journal name BMC Public Health   Check publisher's open access policy
ISSN 1471-2458
Publication date 2011-01
Sub-type Article (original research)
DOI 10.1186/1471-2458-11-27
Open Access Status DOI
Volume 11
Start page 27.1
End page 27.9
Total pages 9
Place of publication London, United Kingdom
Publisher BioMed Central
Collection year 2012
Language eng
Formatted abstract
Background: Meaningful improvement in physical activity among control group participants in lifestyle intervention trials is not an uncommon finding, and may be partly explained by participant characteristics. This study investigated which baseline demographic, health and behavioural characteristics were predictive of successful improvement in physical activity in usual care group participants recruited into a telephone-delivered physical activity and diet intervention trial, and descriptively compared these characteristics with those that were predictive of improvement among intervention group participants.
Methods: Data come from the Logan Healthy Living Program, a primary care-based, cluster-randomized controlled trial of a physical activity and diet intervention. Multivariable logistic regression models examined variables predictive of an improvement of at least 60 minutes per week of moderate-to-vigorous intensity physical activity among usual care (n = 166) and intervention group (n = 175) participants.
Results: Baseline variables predictive of a meaningful change in physical activity were different for the usual care and intervention groups. Being retired and completing secondary school (but no further education) were predictive of physical activity improvement for usual care group participants, whereas only baseline level of physical activity was predictive of improvement for intervention group participants. Higher body mass index and being unmarried may also be predictors of physical activity improvement for usual care participants.
Conclusion: This is the first study to examine differences in predictors of physical activity improvement between intervention group and control group participants enrolled in a physical activity intervention trial. While further empirical research is necessary to confirm findings, results suggest that participants with certain socio-demographic characteristics may respond favourably to minimal intensity interventions akin to the treatment delivered to participants in a usual care group. In future physical activity intervention trials, it may be possible to screen participants for baseline characteristics in order to target minimal-intensity interventions to those most likely to benefit.
Keyword American Heart Association
Primary care
Health promotion
Cardiovascular disease
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article # 27

Document type: Journal Article
Sub-type: Article (original research)
Collections: Cancer Prevention Research Centre Publications
Official 2012 Collection
School of Public Health Publications
 
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