TY  - JOUR
AU  - Spark, Lauren C
AU  - Fjeldsoe, Brianna S
AU  - Eakin, Elizabeth G
AU  - Reeves, Marina M
PY  - 2015
DA  - 2015/09/15
TI  - Efficacy of a Text Message-Delivered Extended Contact Intervention on Maintenance of Weight Loss, Physical Activity, and Dietary Behavior Change
JO  - JMIR mHealth uHealth
SP  - e88
VL  - 3
IS  - 3
KW  - weight
KW  - physical activity
KW  - diet
KW  - mobile telephone
KW  - intervention
KW  - behavior change
KW  - maintenance
KW  - SMS
KW  - mhealth
KW  - textmessaging
AB  - Background: Extending contact with participants after the end of an initial intervention is associated with successful maintenance of weight loss and behavior change. However, cost-effective methods of extending intervention contact are needed. Objective: This study investigated whether extended contact via text message was efficacious in supporting long-term weight loss and physical activity and dietary behavior change in breast cancer survivors. Methods: Following the end of an initial 6-month randomized controlled trial of a telephone-delivered weight loss intervention versus usual care, eligible and consenting intervention participants received a 6-month extended contact intervention via tailored text messages targeting a range of factors proposed to influence the maintenance of behavior change. In this single-group, pre-post designed study, within group changes in weight, moderate-to-vigorous physical activity (Actigraph GT3X+ accelerometers), and total energy intake (2x24 hour dietary recalls) were evaluated from baseline to end of initial intervention (6 months), end of extended contact intervention (12 months), and after a no-contact follow-up (18 months) via linear mixed models. Feasibility of implementation was assessed through systematic tracking of text message delivery process outcomes, and participant satisfaction was assessed through semistructured interviews. Results: Participants at baseline (n=29) had a mean age of 54.9 years (SD 8.8), body mass index of 30.0 kg/m2 (SD 4.2), and were recruited a mean 16.6 months (SD 3.2) post diagnosis. From baseline to 18 months, participants showed statistically significantly lower mean weight (-4.2 kg [95% CI -6.0 to -2.4]; P<.001) and higher physical activity (mean 10.4 mins/day [95% CI 3.6-17.2]; P=.003), but no significant differences in energy intake (P=.200). Participants received a mean of 8 text messages every 2 weeks (range 2-11) and reported a high rate of satisfaction. Conclusions: In comparison to interventions without extended contact, results suggest text message–delivered extended contact may support the attenuation of weight regain and promote the maintenance of physical activity. 
SN  - 2291-5222
UR  - http://mhealth.jmir.org/2015/3/e88/
UR  - https://doi.org/10.2196/mhealth.4114
UR  - http://www.ncbi.nlm.nih.gov/pubmed/26373696
DO  - 10.2196/mhealth.4114
ID  - info:doi/10.2196/mhealth.4114
ER  -