Combining Lifestyle Modification and Liraglutide to Improve Weight Loss and Health Outcomes
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 入组人数
- 150
- 试验地点
- 1
- 主要终点
- Percent Change in Baseline Weight
研究概览
简要总结
This is a 52 week, single center, open-labeled, randomized controlled trial.
A total of 150 subjects with obesity, who are free of types 1 and 2 diabetes, as well as contraindications to weight loss, will be randomly assigned to one of three treatment groups: 1) lifestyle counseling, as currently recommended by the Centers for Medicare and Medicaid Services (CMS) (i.e., CMS-Alone); 2) CMS lifestyle counseling plus liraglutide (i.e., CMS-Liraglutide); or 3) CMS-Liraglutide plus a portion-controlled diet (i.e., Multi-Component Intervention).
Subjects in all three groups will have 14 brief (15 minute) lifestyle counseling visits the first 24 weeks, followed by monthly visits in weeks 25-52. This is the schedule and duration of counseling visits recommended by CMS. Counseling sessions will be delivered by a physician, nurse practitioner or registered dietitian (RD) working in consultation with the former providers.
Subjects in all three groups also will have brief physician visits at weeks 1, 4, 8, 16, 24, 36, and 52 (total of 7 visits). These visits are needed for subjects in both liraglutide groups to monitor their response to the medication. These visits are included for subjects in CMS-Alone to match the intensity of medical care provided the two other groups.
The primary outcome is % reduction in initial body weight, as measured from randomization to week 52. Secondary outcomes include the proportion of participants who at week 52 lose >5%, >10%, and >15% of initial weight, as well as % reduction in weight at week 24 and the proportion of participants who meet the three categorical weight losses at this time. The secondary efficacy measures include changes (from randomization to week 52) in cardiovascular disease (CVD) risk factors, glycemic control, mood, quality of life, eating behavior, appetite, sleep, and satisfaction with weight loss.
Safety endpoints will include physical examination, adverse events (AEs), standard laboratory tests, and mental health assessed by the Columbia Suicidality Severity Rating Scale (C-SSRS) and Patient Health Questionnaire (PHQ-9).
Statistical Analysis. Using a sample size equation for longitudinal clustered samples, a randomization sample of 50 subjects in CMS-Alone, 50 in CMS-Liraglutide, and 50 in the Multi-Component Intervention provides >80% power to detect the two primary contrasts to be statistically significant. This estimate allows for 20% attrition during the 52-week trial, resulting in approximately 40 treatment completers per group. The ITT longitudinal statistical design will further improve power by allowing the inclusion of available data for non-completers and the adjustment of possible variance reducing baseline covariates.
详细描述
The addendum to the original 52-week trial, is a 12-week, single center, randomized placebo-controlled, parallel group designed trial. This 12-week extension study is separate from the original 52-week trial and will not affect the outcome or analysis of the 52-week, 3-arm trial.
Participants and investigators will be masked to participants' assignment to phentermine 15 mg/d versus placebo. Participants in both groups will receive liraglutide in an open-label manner.
We anticipate that 23 (of 50) participants from the original CMS-Liraglutide group and 23 (of 50) from the Multi-Component Intervention will be eligible to participate in the extension study and will elect to do so. We anticipate that 20 participants in each group will complete the 12-week extension study and that those who receive liraglutide 3.0 mg plus phentermine 15.0 mg/d will lose, from randomization to week 12, 3.5+3.5% of initial weight, compared with 0.0+0.5% for those assigned to liraglutide plus placebo.
All participants in the extension study will meet with a physician or nurse practitioner at randomization (week 0) and at weeks 2, 4, 8 and 12. On each occasion they will review patients' blood pressure and pulse, assess suicidal ideation, and record and respond appropriately to reports of changes in physical health. As during the 1-year prior trial, brief lifestyle counseling (15 min) will provided at monthly visits (excluding week 2) by the physician or nurse practitioner or by a registered dietitian or behavioral psychologist, working under their supervision. The lifestyle intervention will be the same as that provided during the last 6 months of both the CMS-Liraglutide and Multi-Component interventions.
Following the 12-week randomized trial, phentermine (or placebo) will be terminated, and all participants will continue to receive liraglutide 3.0 mg/d for an additional 8 weeks (i.e., weeks 12-20) and have lifestyle counseling and medical assessments at weeks 16 and 20. Liraglutide 3.0 mg/d will be terminated at week 20, and participants will have a final safety assessment at week 24.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
盲法说明
In the 12 week extension study, participants who are eligible will continue to take liraglutide 3.0 mg in an open fashion. Participants will be randomly assigned in a double-blind fashion to placebo or phentermine.
入排标准
- 年龄范围
- 21 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Participants must have a BMI ≥ 30 and ≤ 55 kg/m²
- •Age ≥ 21 years and ≤ 70 years
- •Eligible female patients will be:
- •non-pregnant, evidenced by a negative urine dipstick pregnancy test
- •non-lactating
- •surgically sterile or postmenopausal, or they will agree to continue to use an accepted method of birth control during the study
- •Ability to provide informed consent before any trial-related activities
- •Participants must:
- •have a primary care provider (PCP) who is responsible for providing routine care
- •have a reliable telephone service with which to communicate with study staff
- •understand and be willing to comply with all study-related procedures and agree to participate in the study by giving written informed consent
- •plan to remain in the Philadelphia area for the next 18 months
排除标准
- •Pregnant or nursing, or plans to become pregnant in the next 18 months, or not using adequate contraceptive measures
- •Personal or family history of medullary thyroid cancer or multiple endocrine neoplasia syndrome type 2
- •Uncontrolled hypertension (systolic blood pressure ≥ 160 mm Hg or diastolic blood pressure ≥ 100 mm Hg)
- •Type 1 diabetes
- •Type 2 diabetes
- •A fasting glucose ≥ 126 mg/dl (on second assessment after first elevated value)
- •Recent history of cardiovascular disease (e.g., myocardial infarction or stroke within the past 6 months), congestive heart failure, or heart block greater than first degree
- •Clinically significant hepatic or renal disease
- •Thyroid disease, not controlled
- •History of malignancy (except for non-melanoma skin cancer) in past 5 years
- •Current major depressive episode, active suicidal ideation, or history of suicide attempts
- •Psychiatric hospitalization within the past 6 months
- •Self-reported alcohol or substance abuse within the past 12 months, including at-risk drinking (current consumption of ≥ 14 alcoholic drinks per week)
- •Use in past 3 months of medications known to induce significant weight loss (i.e., prescription weight loss medications) or weight gain (e.g., chronic use of oral steroids, second generation antipsychotics)
- •Loss of ≥ 10 lb of body weight within the past 3 months
- •History of (or plans for) bariatric surgery
- •Inability to walk 5 blocks comfortably or engage in some other form of aerobic activity (e.g., swimming)
- •Known or suspected allergy to trial medication(s), excipients, or related products
- •Hypersensitivity to liraglutide or any product components
- •The receipt of any investigational drug within 6 months prior to this trial
- •Previous participation in this trial (e.g., randomized and failed to participate)
- •History of pancreatitis
- •Subjects will be included/excluded according to the latest updated US PI.
- •12-Week Extension Trial:
- •Inclusion Criteria
- •Inclusion criteria are those described for the original 1-year trial (enumerated above). The principal exception from these criteria is that participants will only be required to have a BMI > 27 kg/m2, with or without co-morbidities, to be eligible to participate in the extension study. All participants will have met BMI inclusion criteria when they initiated the use of liraglutide and now will use it, potentially with phentermine 15 mg/d, to facilitate to the maintenance of lost weight. (Liraglutide is approved for chronic weight management, including following successful weight loss.) We do not wish to enroll participants with a BMI < 27 kg/m2 because of the possibility that they could reduce substantially below a BMI of 24.9 kg/m2, the upper limit of "normal" weight.
- •Exclusion Criteria:
- •Exclusion criteria will include those listed in the original protocol, including those specific to the use of liraglutide 3.0 mg/d (e.g., family history of medullary thyroid cancer).
- •Additional exclusion criteria added to the 12-week extension study are specific to the use of phentermine 15 mg/d. They include:
- •Use of monoamine oxidase inhibitors in the past 2 weeks
- •Presence or history of marked agitation
- •History of drug abuse
- •Known hypersensitivity to sympathomimetic amines
- •Current use of selective serotonin re-uptake inhibitors (e.g., fluoxetine, sertraline, etc)
- •Current use of any other weight loss medications (besides liraglutide 3.0 mg/d)
- •History of coronary artery disease
研究组 & 干预措施
CMS-Alone
Lifestyle counseling, as currently recommended by the CMS.
干预措施: CMS-recommended lifestyle counseling (Behavioral)
CMS-Liraglutide
CMS lifestyle counselling plus liraglutide.
干预措施: CMS-recommended lifestyle counseling (Behavioral)
CMS-Liraglutide
CMS lifestyle counselling plus liraglutide.
干预措施: Liraglutide 3.0mg (Drug)
Multi-Component Intervention
CMS-Liraglutide plus a 1000-1200 kcal/day portion-controlled diet prescribed for 12 weeks.
干预措施: CMS-recommended lifestyle counseling (Behavioral)
Multi-Component Intervention
CMS-Liraglutide plus a 1000-1200 kcal/day portion-controlled diet prescribed for 12 weeks.
干预措施: Liraglutide 3.0mg (Drug)
Multi-Component Intervention
CMS-Liraglutide plus a 1000-1200 kcal/day portion-controlled diet prescribed for 12 weeks.
干预措施: Portion-Controlled Diet (Other)
12-Week Extension Study: Phentermine Group
After the 1-year trial, half the participants who join the extension study will be randomized to phentermine 15.0 mg/d in a double-blind fashion, while continuing to take liraglutide. They will also continue to receive monthly lifestyle counseling. To be eligible for the extension study, participants must have been assigned to one of two medication groups in the original study.
干预措施: Liraglutide 3.0mg (Drug)
12-Week Extension Study: Phentermine Group
After the 1-year trial, half the participants who join the extension study will be randomized to phentermine 15.0 mg/d in a double-blind fashion, while continuing to take liraglutide. They will also continue to receive monthly lifestyle counseling. To be eligible for the extension study, participants must have been assigned to one of two medication groups in the original study.
干预措施: Phentermine 15 MG (Drug)
12-Week Extension Study: Phentermine Group
After the 1-year trial, half the participants who join the extension study will be randomized to phentermine 15.0 mg/d in a double-blind fashion, while continuing to take liraglutide. They will also continue to receive monthly lifestyle counseling. To be eligible for the extension study, participants must have been assigned to one of two medication groups in the original study.
干预措施: Extension Study CMS-recommended lifestyle counseling (Behavioral)
12-Week Extension Study: Placebo Group
After the 1-year trial, half the participants who join the extension study will be randomized to placebo in a double-blind fashion, while continuing to take liraglutide. They will also continue to receive monthly lifestyle counseling. To be eligible for the extension study, participants must have been assigned to one of two medication groups in the original study.
干预措施: Liraglutide 3.0mg (Drug)
12-Week Extension Study: Placebo Group
After the 1-year trial, half the participants who join the extension study will be randomized to placebo in a double-blind fashion, while continuing to take liraglutide. They will also continue to receive monthly lifestyle counseling. To be eligible for the extension study, participants must have been assigned to one of two medication groups in the original study.
干预措施: Placebo Oral Tablet (Drug)
12-Week Extension Study: Placebo Group
After the 1-year trial, half the participants who join the extension study will be randomized to placebo in a double-blind fashion, while continuing to take liraglutide. They will also continue to receive monthly lifestyle counseling. To be eligible for the extension study, participants must have been assigned to one of two medication groups in the original study.
干预措施: Extension Study CMS-recommended lifestyle counseling (Behavioral)
结局指标
主要结局
Percent Change in Baseline Weight
时间窗: Randomization and 52 weeks
Extension Study Primary Outcome: Percent Change in Re-randomization Weight
时间窗: Re-randomization and 12 weeks
次要结局
- Change in LDL Cholesterol(Randomization and 52 weeks)
- Change in Triglycerides(Randomization and 52 weeks)
- Change in C Reactive Protein(Randomization and 52 weeks)
- Change in Heart Rate(Randomization and 52 weeks)
- Change in Waist Circumference(Randomization and 52 weeks)
- Change in Fasting Glucose(Randomization and 52 weeks)
- Change in HbA1c(Randomization and 52 weeks)
- Change in Systolic Blood Pressure(Randomization and 52 weeks)
- Change in HDL Cholesterol(Randomization and 52 weeks)
- Change in Total Cholesterol(Randomization and 52 weeks)
- Change in Diastolic Blood Pressure(Randomization and 52 weeks)
- Change in Fasting Insulin(Randomization and 52 weeks)
- Change in HOMA-IR(Randomization and 52 weeks)
- Change in Patient Health Questionnaire (PHQ-9)(Randomization and 52 weeks)
- Change in 36-Item Short Form Survey (SF-36) - Physical Component Summary(Randomization and 52 weeks)
- Extension Study Secondary Outcome: Change in Waist Circumference(Re-randomization and 12 weeks)
- Change 36-Item Short Form Survey (SF-36) - Mental Component Summary(Randomization and 52 weeks)
- Extension Study Secondary Outcome: Change in Total Cholesterol(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in HDL Cholesterol(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in c-Reactive Protein(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: SF-36 - Physical Health Component(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: SF-36 - Mental Health Component(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in Systolic Blood Pressure(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in Diastolic Blood Pressure(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in Heart Rate(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in Fasting Glucose(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in HbA1c(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in LDL Cholesterol(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in Triglycerides(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in HOMA-IR(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Change in Fasting Insulin(Re-randomization and 12 weeks)
- Extension Study Secondary Outcome: Patient Health Questionnaire (PHQ-9)(Re-randomization and 12 weeks)