Telephone-based motivational interviewing versus usual care in primary care to increase physical activity: a randomized pilot study

Deborah Rohm Young, Miki K Nguyen, Ayae Yamamoto, Magdalena Pomichowski, Melissa Cornejo, Silvia Paz, Karen J Coleman, Robert E Sallis, Stephen P Fortmann, Deborah Rohm Young, Miki K Nguyen, Ayae Yamamoto, Magdalena Pomichowski, Melissa Cornejo, Silvia Paz, Karen J Coleman, Robert E Sallis, Stephen P Fortmann

Abstract

Background: Diabetes and prediabetes are chronic conditions that affect over 40% of the US adult population combined. Regular physical activity can benefit people with diabetes through improved glucose control and can reduce the conversion of prediabetes to diabetes. Studies are needed in settings where people with these conditions can be identified and provided the skills and support to increase physical activity. The primary care setting meets this need, but there are insufficient high-quality trials to recommend this approach be broadly implemented.

Methods: We conducted a randomized, 24-week pilot study in Southern California to assess the feasibility of using information technology systems available in primary care for identifying potential participants, test methods for obtaining physical activity clearance, conducting mail-based assessments, and delivering telephone-based motivational interviewing to increase physical activity. Eligibility criteria included age between 18 and 74 years, diabetes or prediabetes, and physically inactive based on a clinical assessment tool. At baseline and follow-up, physical activity was assessed by a 7-day accelerometry, cardiometabolic risk factors were collected from electronic medical records, and psychosocial factors were assessed from validated questionnaires administered through a mail survey. Participants were block randomized into intervention or usual care. Staff collecting outcome data were blinded to group assignment. Analysis of covariance was used to assess the difference at follow-up between the intervention and usual care, adjusting for baseline.

Results: A total of 67 participants were randomized. Follow-up mail assessments were completed by 53 participants. Of 224 potential intervention calls, 194 were completed (87%). Psychosocial measures significantly improved in four of the five factors for physical activity motivation relative to participants in the usual care arm. The more internally focused factors for exercise self-regulation and outcome expectancies scores were significantly greater for participants in intervention compared with usual care. Moderate to vigorous physical activity improved in intervention participants relative to usual care, but the difference was not statistically significant. No adverse events were noted.

Conclusions: The objectives of this pilot study were met. If a fully powered trial is successful, primary care settings with "behind-the-scenes" information technology support may be appropriate to increase physical activity among patients with prediabetes and diabetes.

Trial registration: Exercise Promotion in Primary Care (EPPC), NCT03429088, registered on February 5, 2018.

Keywords: Diabetes; Physical activity; Prediabetes; Primary care settings.

Conflict of interest statement

The study is registered at Clin.Trial.gov (NCT03429088), and ethical approval is confirmed (Kaiser Permanente Southern California Institutional Review Board, IRB # 10106).Not applicableThe authors declare that they have no competing interests.Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Sample flow chart
Fig. 2
Fig. 2
Recruitment flow chart

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