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Introduction: All Veterans Affairs (VA) Medical Centers offer the MOVE! Weight Management Program to help patients achieve and maintain a healthy weight through a calorie-restricted, low-fat diet and increased physical activity. Yet, most MOVE! participants do not achieve clinically significant weight loss of ≥5%. A carbohydrate-restricted diet may help more Veterans to achieve ≥5% weight loss. Methods: This was a single-arm explanatory sequential mixed methods pilot study conducted in one VA health care system. Veterans with prediabetes and body mass index ≥25 kg/m2 were invited to participate in a group-based, virtual, very low-carbohydrate Diabetes Prevention Program (VLC-DPP) consisting of 23 sessions over 12 months. Participants were taught to follow a very low-carbohydrate eating pattern, defined as 20-35 grams of net carbohydrates per day. The primary outcomes were measures of feasibility and acceptability, including program uptake and session attendance. Secondary outcomes included change in weight, hemoglobin A1c, lipids, and patient-reported measures of food cravings, stress eating, perceived health status, and motivation. Interviews were conducted at 6 months to identify factors that facilitated or hindered participants' achievement of ≥5% weight loss. Results: Among 108 screened Veterans, 21 enrolled in the study (19%), and 18 were included in the analytic cohort. On average, participants attended 12.4/16 weekly sessions and 3.6/8 bimonthly or monthly sessions. At 12 months, mean percent weight loss was 9.4% (SD = 10.7) with 9 participants (50%) achieving ≥5% weight loss. Three factors facilitated achievement of ≥5% weight loss among 10/16 interviewees: (1) enjoyment of low-carbohydrate foods; (2) careful monitoring of carbohydrate intake; and (3) reduced hunger and food cravings. Three factors hindered achievement of ≥5% weight loss among 6/16 interviewees: (1) food cravings, particularly for sweets; (2) challenges with maintaining a food log; and (3) difficulty with meal planning. Conclusion: A VLC-DPP is feasible and acceptable and shows preliminary efficacy among Veterans with prediabetes. The program's weight loss effectiveness compared to standard MOVE! should be evaluated in a larger-scale trial. Such a program may be offered in addition to the standard MOVE! program to expand the menu of evidence-based lifestyle counseling options for Veterans. Clinical Trial Registration: https://clinicaltrials.gov/ct2/show/NCT04881890, identifier NCT04881890.
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BACKGROUND: Primary care patients with obesity seldom receive effective weight management treatment in primary care settings. This study aims to understand PCPs' perspectives on obesity treatment barriers and opportunities to overcome them. STUDY DESIGN: This is an explanatory sequential mixed methods study in which survey data was collected and used to inform subsequent qualitative interviews. SETTINGS AND PARTICIPANTS: PCPs who provide care to adult patients in an academic medical center in the Midwestern US. METHODOLOGY: PCPs (n = 350) were invited by email to participate in an online survey. PCPs were subsequently invited to participate in semi-structured interviews to further explore survey domains. ANALYTIC APPROACH: Survey data were analyzed using descriptive statistics. Interviews were analyzed using directed content analysis. RESULTS: Among 107 survey respondents, less than 10% (n = 8) used evidence-based guidelines to inform obesity treatment decisions. PCPs' identified opportunities to improve obesity treatment including (1) education on local obesity treatment resources (n = 78, 73%), evidence-based dietary counseling strategies (n = 67, 63%), and effective self-help resources (n = 75, 70%) and (2) enhanced team-based care with support from clinic staff (n = 53, 46%), peers trained in obesity medicine (n = 47, 44%), and dietitians (n = 58, 54%). PCPs also desired increased reimbursement for obesity treatment. While 40% (n = 39) of survey respondents expressed interest in obesity medicine training and certification through the American Board of Obesity Medicine, qualitative interviewees felt that pursuing training would require dedicated time (i.e., reduced clinical effort) and financial support. CONCLUSIONS: Opportunities to improve obesity treatment in primary care settings include educational initiatives, use of team-based care models, and policy changes to incentivize obesity treatment. Primary care clinics or health systems should be encouraged to identify PCPs with specific interests in obesity medicine and support their training and certification through ABOM by reimbursing training costs and reducing clinical effort to allow for study and board examination.
