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

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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)

Keywords:
Osteoporosis prevention, Cluster randomized trial, Premenopausal women, Workplace, Calcium intake, Physical activity

Autoři: Ai May Tan ^1*; Anthony D. Lamontagne ^1,2; Dallas R. English ^3,4; Peter Howard ⁵
Působiště autorů: McCaughey Centre: VicHealth Centre for the Promotion of Mental Health & Community Wellbeing, Melbourne School of Population and Global Health, University of Melbourne, Melbourne, VIC 010, Australia. ¹; Centre for Population Health Research, Building BC, Level , School of Health & Social Development, Deakin University, Burwood, VIC 12 , Australia. ²; Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Melbourne, VIC 3010, Australia. ³; Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne 3004, Australia. ⁴; Melbourne School of Population and Global Health, University of Melbourne, Melbourne, VIC 3010, Australia. ⁵
Vyšlo v časopise: BMC Public Health 2016, 16:859
Kategorie: Research article
prolekare.web.journal.doi_sk: https://doi.org/10.1186/s12889-016-3506-y

© 2016 The Author(s).

Open access
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
The electronic version of this article is the complete one and can be found online at: http://bmcpublichealth.biomedcentral.com/articles/10.1186/s12889-016-3506-y

Souhrn

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)

Keywords:
Osteoporosis prevention, Cluster randomized trial, Premenopausal women, Workplace, Calcium intake, Physical activity

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2016 Číslo 859

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

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