A telephone-delivered physical activity and dietary intervention for type 2 diabetes and hypertension: does intervention dose influence outcomes?

Goode, Ana D., Winkler, Elisabeth A. H., Lawler, Sheleigh P., Reeves, Marina M., Owen, Neville and Eakin, Elizabeth G. (2011) A telephone-delivered physical activity and dietary intervention for type 2 diabetes and hypertension: does intervention dose influence outcomes?. American Journal of Health Promotion, 25 4: 257-263. doi:10.4278/ajhp.090223-QUAN-75


Author Goode, Ana D.
Winkler, Elisabeth A. H.
Lawler, Sheleigh P.
Reeves, Marina M.
Owen, Neville
Eakin, Elizabeth G.
Title A telephone-delivered physical activity and dietary intervention for type 2 diabetes and hypertension: does intervention dose influence outcomes?
Journal name American Journal of Health Promotion   Check publisher's open access policy
ISSN 0890-1171
Publication date 2011-03-01
Sub-type Article (original research)
DOI 10.4278/ajhp.090223-QUAN-75
Volume 25
Issue 4
Start page 257
End page 263
Total pages 7
Place of publication United States
Publisher American Journal of Health Promotion
Language eng
Formatted abstract
Purpose. To examine associations of intervention dose with behavior change outcomes in a telephone counseling intervention for physical activity and dietary change.

Design. Secondary analysis of intervention participants from a cluster-randomized controlled trial.

Setting. Primary care practices in a disadvantaged community in Queensland, Australia.

Subjects. Adult patients with type 2 diabetes or hypertension.

Intervention. Patients (n = 228) received telephone counseling over a 12-month period. The initiation phase (1–4 months) consisted of up to 10 weekly or fortnightly calls; the maintenance-enhancement phase (5–12 months) consisted of up to eight monthly calls.

Measures. Intervention dose was defined as the number of calls completed in total and during each phase and was categorized into tertiles. Diet and physical activity were measured using validated self-report instruments.

Analysis. Multivariate analyses of call completion and change in health behaviors.

Results. Those completing a high number of calls were more likely to be female, white, older than 60 years, retired, and earning less than an average weekly Australian wage. Relative to low call completion, high completion during the maintenance-enhancement phase was associated with significantly greater (least squares mean [SE]) behavioral improvement for the following: total fat intake as percentage of calories (−3.58% [.74%]), saturated fat intake (−2.51% [.51%]), fiber intake (4.23 [1.20] g), and moderate-to-vigorous physical activity (187.82 [44.78] minutes).

Conclusion. Interventions of longer duration may be required to influence complex behaviors such as physical activity and fat and fiber intake.

Keyword Exercise
Diet
Implementation
Dose response
Hypertension
Type 2 diabetes
Prevention research
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Public Health Publications
 
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Created: Tue, 06 Sep 2011, 23:46:03 EST by Geraldine Fitzgerald on behalf of School of Public Health