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Open Access 01-12-2016 | Research article

Efficacy of a workplace osteoporosis prevention intervention: a cluster randomized trial

Authors: Ai May Tan, Anthony D. LaMontagne, Dallas R. English, Peter Howard

Published in: BMC Public Health | Issue 1/2016

Abstract

Background

Osteoporosis is a debilitating disease. Adequate calcium consumption and physical activity are the two major modifiable risk factors. This paper describes the major outcomes and efficacy of a workplace-based targeted behaviour change intervention to improve the dietary and physical activity behaviours of working women in sedentary occupations in Singapore.

Methods

A cluster-randomized design was used, comparing the efficacy of a tailored intervention to standard care. Workplaces were the units of randomization and intervention. Sixteen workplaces were recruited from a pool of 97, and randomly assigned to intervention and control arms (eight workplaces in each). Women meeting specified inclusion criteria were then recruited to participate. Workplaces in the intervention arm received three participatory workshops and organization-wide educational activities. Workplaces in the control/standard care arm received print resources. Outcome measures were calcium intake (milligrams/day) and physical activity level (duration: minutes/week), measured at baseline, 4 weeks and 6 months post intervention. Adjusted cluster-level analyses were conducted comparing changes in intervention versus control groups, following intention-to-treat principles and CONSORT guidelines.

Results

Workplaces in the intervention group reported a significantly greater increase in calcium intake and duration of load-bearing moderate to vigorous physical activity (MVPA) compared with the standard care control group. Four weeks after intervention, the difference in adjusted mean calcium intake was 343.2 mg/day (95 % CI = 337.4 to 349.0, p < .0005) and the difference in adjusted mean load-bearing MVPA was 55.6 min/week (95 % CI = 54.5 to 56.6, p < .0005). Six months post intervention, the mean differences attenuated slightly to 290.5 mg/day (95 % CI = 285.3 to 295.7, p < .0005) and 50.9 min/week (95 % CI =49.3 to 52.6, p < .0005) respectively.

Conclusion

This workplace-based intervention substantially improved calcium intake and load-bearing moderate to vigorous physical activity 6 months after the intervention began.

Trial registration

Australia New Zealand Clinical Trial Registry ACTRN12616000079448. Registered 25 January 2016 (retrospectively registered)

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Title: Efficacy of a workplace osteoporosis prevention intervention: a cluster randomized trial
Authors: Ai May Tan
Anthony D. LaMontagne
Dallas R. English
Peter Howard
Publication date: 01-12-2016
Publisher: BioMed Central
Published in: BMC Public Health / Issue 1/2016
Electronic ISSN: 1471-2458
DOI: https://doi.org/10.1186/s12889-016-3506-y

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Springer Medicine

Efficacy of a workplace osteoporosis prevention intervention: a cluster randomized trial

Abstract

Background

Methods

Results

Conclusion

Trial registration

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Methods

Results

Conclusion

Trial registration

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