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

Tan, Ai May, LaMontagne, Anthony D., English, Dallas R. and Howard, Peter 2016, Efficacy of a workplace osteoporosis prevention intervention: a cluster randomized trial, BMC public health, vol. 16, Article Number : 859, pp. 1-14, doi: 10.1186/s12889-016-3506-y.

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Title Efficacy of a workplace osteoporosis prevention intervention: a cluster randomized trial
Author(s) Tan, Ai May
LaMontagne, Anthony D.ORCID iD for LaMontagne, Anthony D. orcid.org/0000-0002-5811-5906
English, Dallas R.
Howard, Peter
Journal name BMC public health
Volume number 16
Season Article Number : 859
Start page 1
End page 14
Total pages 14
Publisher BioMed Central
Place of publication London, Eng.
Publication date 2016-08-24
ISSN 1471-2458
Keyword(s) Calcium intake
Cluster randomized trial
Osteoporosis prevention
Physical activity
Premenopausal women
Workplace
Science & Technology
Life Sciences & Biomedicine
Public, Environmental & Occupational Health
BONE-MINERAL DENSITY
INCREASE PHYSICAL-ACTIVITY
HIGH-IMPACT EXERCISE
POSTMENOPAUSAL WOMEN
EDUCATIONAL INTERVENTION
NUTRITION EDUCATION
YOUNG-WOMEN
OLDER WOMEN
Summary 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).
Language eng
DOI 10.1186/s12889-016-3506-y
Field of Research 111799 Public Health and Health Services not elsewhere classified
1117 Public Health And Health Services
Socio Economic Objective 920116 Skeletal System and Disorders (incl. Arthritis)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30086193

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.