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Mediators and moderators of nutrition intervention effects in remote Indigenous Australia

Brimblecombe, Julie, Ferguson, Megan, Barzi, Federica, Brown, Clare and Ball, Kylie 2018, Mediators and moderators of nutrition intervention effects in remote Indigenous Australia, British journal of nutrition, vol. 119, no. 12, pp. 1424-1433, doi: 10.1017/S0007114518000880.

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Title Mediators and moderators of nutrition intervention effects in remote Indigenous Australia
Author(s) Brimblecombe, Julie
Ferguson, Megan
Barzi, Federica
Brown, Clare
Ball, KylieORCID iD for Ball, Kylie orcid.org/0000-0003-2893-8415
Journal name British journal of nutrition
Volume number 119
Issue number 12
Start page 1424
End page 1433
Total pages 10
Publisher Cambridge University Press
Place of publication Cambridge, Eng.
Publication date 2018-06-28
ISSN 0007-1145
1475-2662
Summary We conducted a longitudinal dietary intervention study to assess the impact of a store-based intervention on mediators and moderators and consequent dietary behaviour in Indigenous communities in remote Australia. We assessed dietary intake of fruit, vegetable, water and sweetened soft drink, mediators and moderators among 148, eighty-five and seventy-Three adult participants (92 % women) at baseline (T1), end of intervention (T2) and at 24 weeks post intervention (T3), respectively. Mediators included perceived affordability and self-efficacy. Moderators were barriers to eat more fruit and vegetables and food security. Mixed-effects models were used to determine changes in mediators and moderators with time and associations between these and each dietary outcome. Perceived vegetable affordability increased from T1 (19 %; 95 % CI 11, 27) to T2 (38 %; 95 % CI 25, 51) (P=0·004) and returned to baseline levels at T3. High self-efficacy to eat more fruit and vegetables and to drink less soft drink decreased from T1 to T3. A reduction in soft drink intake of 27 % (95 % CI-44,-4; P=0·02) was reported at T3 compared with T1; no changes with time were observed for all other outcome measures. Regardless of time, vegetable intake was positively associated with self-efficacy to cook and try new vegetables, no barriers and food security. The dietary intervention went someway to improving perceived affordability of vegetables but was probably not strong enough to overcome other mediators and moderators constraining behaviour change. Meaningful dietary improvement in this context will be difficult to achieve without addressing underlying constraints to behaviour change.
Language eng
DOI 10.1017/S0007114518000880
Field of Research 111199 Nutrition and Dietetics not elsewhere classified
0702 Animal Production
1111 Nutrition And Dietetics
0908 Food Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Grant ID NHMRC 1042442
NHMRC 1024285
Copyright notice ©2018, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30109958

Document type: Journal Article
Collections: School of Exercise and Nutrition Sciences
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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.