STEP 1: Research Study Investigating How Well Semaglutide Works in People Suffering From Overweight or Obesity
STEP 1
Effect and Safety of Semaglutide 2.4 mg Once-weekly in Subjects With Overweight or Obesity
3 other identifiers
interventional
1,961
17 countries
128
Brief Summary
This study will look at the change in participants' body weight from the start to the end of the study. The weight loss in participants taking semaglutide (a new medicine) will be compared to the weight loss of participants taking "dummy" medicine. In addition to taking the medicine, participants will have talks with study staff about healthy food choices, how to be more physically active and what you can do to lose weight. Participants will either get semaglutide or "dummy" medicine - which treatment participants get, is decided by chance. Participants will need to take 1 injection once a week. The study medicine is injected with a thin needle in a skin fold in the stomach, thigh or upper arm. The study has two phases: A main phase and an extension phase.The main phase will last for about 1.5 years. Participants will have 15 clinic visits and 10 phone calls with the study doctor. Extension phase: Approximately 300 participants will continue in the extension phase in the following countries only: Canada, Germany, the UK and selected sites in the US and Japan. These participants will be in the study for about 2.5 years.They will not receive treatment, but will attend another 5 follow-up visits with the study doctor.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for phase_3
Started Jun 2018
Typical duration for phase_3
128 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
May 25, 2018
CompletedStudy Start
First participant enrolled
June 4, 2018
CompletedFirst Posted
Study publicly available on registry
June 7, 2018
CompletedPrimary Completion
Last participant's last visit for primary outcome
March 30, 2020
CompletedStudy Completion
Last participant's last visit for all outcomes
March 5, 2021
CompletedResults Posted
Study results publicly available
August 11, 2021
CompletedNovember 19, 2021
November 1, 2021
1.8 years
May 25, 2018
June 16, 2021
November 18, 2021
Conditions
Outcome Measures
Primary Outcomes (2)
Change in Body Weight (%)
Change in body weight from baseline (week 0) to week 68 is presented. The endpoint was evaluated based on the data from both in-trial and on-treatment observation periods. In-trial observation period: the uninterrupted time interval from date of randomization (week 0) to date of last contact with trial site (week 75). On-treatment observation period: includes all time intervals in which participants are considered to be on treatment from the first (week 0) to last trial product administration (week 68), including 2 weeks of follow-up. It excludes any period of temporary treatment interruption. Temporary treatment interruption is defined as more than 2 consecutive missed doses (off-treatment period).
Baseline (week 0) to week 68
Participants Who Achieve 5 or More Percent Body Weight Reduction (Yes/no)
Number of participants who achieved weight loss more than or equal to 5% (yes/no) at week 68 are presented. The endpoint was evaluated based on the data from both in-trial and on-treatment observation periods. In-trial observation period: the uninterrupted time interval from start of randomization (week 0) to last trial-related subject-site contact (week 75). On-treatment observation period: includes all time intervals in which participants are considered to be on treatment from the first (week 0) to last trial product administration (week 68), including 2 weeks of follow-up. It excludes any period of temporary treatment interruption.
After week 68
Secondary Outcomes (40)
Subjects Who Achieve 10 or More Percent Body Weight Reduction (Yes/no)
Week 68
Participants Who Achieve 15 or More Percent Body Weight Reduction (Yes/no)
Week 68
Participants Who Achieve 20 or More Percent Body Weight Reduction (Yes/no)
Week 68
Change in Waist Circumference (cm)
Baseline (week 0) to week 68
Change in Systolic Blood Pressure (mmHg)
Baseline (week 0) to week 68
- +35 more secondary outcomes
Study Arms (2)
Semaglutide s.c. 2.4 mg once weekly
EXPERIMENTALParticipants will receive semaglutide for 68 weeks.
Semaglutide placebo
PLACEBO COMPARATORParticipants will receive semaglutide matching placebo for 68 weeks.
Interventions
Participants will receive semaglutide subcutaneous (s.c.; under the skin) injection(s) once-weekly as well as diet and physical activity counselling for 68 weeks. Dose escalation of semaglutide will take place as follows: 0.25 mg from week 1 to 4, 0.5 mg from week 5 to 8, 1.0 mg from week 9 to 12, 1.7 mg from week 13 to 16 and 2.4 mg from week 17 to week 68.
Participants will receive semaglutide matching placebo s.c. injection(s) once-weekly as well as diet and physical activity counselling for 68 weeks.
Eligibility Criteria
You may qualify if:
- Main phase:
- Male or female, age greater than or equal to 18 years at the time of signing informed consent
- Body mass index (BMI) greater than or equal to 30.0 kg/sqm or greater than or equal to 27.0 kg/sqm with the presence of at least one of the following weight-related comorbidities (treated or untreated): hypertension, dyslipidaemia, obstructive sleep apnoea or cardiovascular disease
- History of at least one self-reported unsuccessful dietary effort to lose body weight
- Extension phase:
- Informed consent for the extension phase obtained before any trial related activities for the extension phase
- On randomised treatment on the target dose at week 68, i.e. treated with 2.4 mg semaglutide once-weekly or semaglutide placebo
You may not qualify if:
- Main phase:
- Glycated haemoglobin (HbA1C) greater than or equal to 48 mmol/mol (6.5%) as measured by the central laboratory at screening
- A self-reported change in body weight greater than 5 kg (11 lbs) within 90 days before screening irrespective of medical records
- Extension phase:
- Female who is pregnant or intends to become pregnant during the extension phase
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Novo Nordisk A/Slead
Study Sites (128)
Novo Nordisk Investigational Site
Anniston, Alabama, 36207, United States
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Anaheim, California, 92801, United States
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Lomita, California, 90717, United States
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Spring Valley, California, 91978, United States
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Aurora, Colorado, 80045, United States
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Waterbury, Connecticut, 06708, United States
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Chiefland, Florida, 32626, United States
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Crystal River, Florida, 34429, United States
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Jacksonville, Florida, 32205, United States
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Jacksonville, Florida, 32216, United States
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Ocala, Florida, 34470, United States
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Panama City, Florida, 32401, United States
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Plantation, Florida, 33324, United States
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Ponte Vedra, Florida, 32081, United States
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Roswell, Georgia, 30076, United States
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Chicago, Illinois, 60607, United States
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Chicago, Illinois, 60611, United States
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Indianapolis, Indiana, 46260, United States
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Topeka, Kansas, 66606, United States
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Louisville, Kentucky, 40213, United States
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Buckley, Michigan, 49620, United States
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City of Saint Peters, Missouri, 63303, United States
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Butte, Montana, 59701, United States
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Omaha, Nebraska, 68105, United States
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Rochester, New York, 14609, United States
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Salisbury, North Carolina, 28144, United States
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Wilmington, North Carolina, 28401, United States
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West Reading, Pennsylvania, 19611, United States
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Charleston, South Carolina, 29425, United States
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Simpsonville, South Carolina, 29681, United States
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Nashville, Tennessee, 37212-1150, United States
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Austin, Texas, 78749, United States
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Dallas, Texas, 75226, United States
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Dallas, Texas, 75230, United States
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Dallas, Texas, 75234, United States
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Round Rock, Texas, 78681, United States
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Bountiful, Utah, 84010, United States
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Richmond, Virginia, 23294, United States
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Renton, Washington, 98057, United States
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CABA, C1093AAS, Argentina
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Ciudad de Buenos Aires, C1204AAD, Argentina
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Corrientes, 3400, Argentina
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CĂ³rdoba, X5006IKK, Argentina
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Santa Rosa, 6300, Argentina
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Boussu, 7300, Belgium
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Brussels, 1200, Belgium
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Edegem, 2650, Belgium
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Leuven, 3000, Belgium
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Liège, 4000, Belgium
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Plovdiv, 4002, Bulgaria
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Sofia, 1431, Bulgaria
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Sofia, 1606, Bulgaria
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Sofia, 1797, Bulgaria
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Edmonton, Alberta, T6H 2L4, Canada
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Surrey, British Columbia, V3Z 2N6, Canada
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Hamilton, Ontario, L8L 5G8, Canada
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North York, Ontario, M2M 4J5, Canada
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Toronto, Ontario, M4P 1P2, Canada
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Québec, G1V 4G2, Canada
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Québec, G1V 4G5, Canada
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Aarhus N, 8200, Denmark
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Oulu, 90220, Finland
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University of Helsinki, 00014, Finland
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Le Coudray, 28630, France
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Narbonne, 11108, France
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Paris, 75651, France
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Paris, 75908, France
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Pessac, 33600, France
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Pierre-Bénite, 69310, France
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Vénissieux, 69200, France
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Berlin, 12627, Germany
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Bochum, 44787, Germany
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Essen, 45136, Germany
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Essen, 45219, Germany
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Falkensee, 14612, Germany
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Frankfurt, 60313, Germany
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Giessen, 35392, Germany
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Hamburg, 22607, Germany
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Hohenmölsen, 06679, Germany
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Leipzig, 04103, Germany
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Saint Ingbert-OberwĂ¼rzbach, 66386, Germany
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Stuttgart, 70378, Germany
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Wangen, 88239, Germany
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Guntur, Andhra Pradesh, 522001, India
Novo Nordisk Investigational Site
Secunderabad,, Andhra Pradesh, 500003, India
Novo Nordisk Investigational Site
Surat, Gujarat, 395002, India
Novo Nordisk Investigational Site
Rohtak, Haryana, 124001, India
Novo Nordisk Investigational Site
Thiruvananthapuram, Kerala, 695031, India
Novo Nordisk Investigational Site
Nagpur, Maharashtra, 440003, India
Novo Nordisk Investigational Site
Pune, Maharashtra, 411004, India
Novo Nordisk Investigational Site
Pune, Maharashtra, 411021, India
Novo Nordisk Investigational Site
New Dehli, New Delhi, 110029, India
Novo Nordisk Investigational Site
Chennai, Tamil Nadu, 600116, India
Novo Nordisk Investigational Site
Kolkata, West Bengal, 700054, India
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Hyderabad, 500 012, India
Novo Nordisk Investigational Site
Ludhiana, 141001, India
Novo Nordisk Investigational Site
Chiba-shi, Chiba, 260-8677, Japan
Novo Nordisk Investigational Site
Suita-shi, Osaka, 565-0853, Japan
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Tokyo, 103-0027, Japan
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Tokyo, 103-0028, Japan
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Tokyo, 160-0008, Japan
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Guadalajara, Jalisco, 44670, Mexico
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Hermosillo, Sonora, 83280, Mexico
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MĂ©rida, YucatĂ¡n, 97070, Mexico
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Gdynia, 81-338, Poland
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Lodz, 90-242, Poland
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Poznan, 60-589, Poland
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Szczecin, 70-376, Poland
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San Juan, 00921, Puerto Rico
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Moscow, 117036, Russia
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Novosibirsk, 630099, Russia
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Novosibirsk, 630117, Russia
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Penza, 440026, Russia
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Saint Petersburg, 194358, Russia
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Tomsk, 634041, Russia
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Voronezh, 394018, Russia
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Yaroslavl, 150003, Russia
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Taipei, 100, Taiwan
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Bristol, BS10 5NB, United Kingdom
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Cambridge, CB2 0QQ, United Kingdom
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Coventry, CV2 2DX, United Kingdom
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Glasgow, G31 2ER, United Kingdom
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Liverpool, L9 7AL, United Kingdom
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London, SE1 9RT, United Kingdom
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London, W1T 7HA, United Kingdom
Novo Nordisk Investigational Site
Norwich, NR4 7UQ, United Kingdom
Novo Nordisk Investigational Site
Rotherham, S65 1DA, United Kingdom
Novo Nordisk Investigational Site
Taunton, TA1 5DA, United Kingdom
Related Publications (11)
Kushner RF, Calanna S, Davies M, Dicker D, Garvey WT, Goldman B, Lingvay I, Thomsen M, Wadden TA, Wharton S, Wilding JPH, Rubino D. Semaglutide 2.4 mg for the Treatment of Obesity: Key Elements of the STEP Trials 1 to 5. Obesity (Silver Spring). 2020 Jun;28(6):1050-1061. doi: 10.1002/oby.22794.
PMID: 32441473BACKGROUNDWilding JPH, Batterham RL, Calanna S, Davies M, Van Gaal LF, Lingvay I, McGowan BM, Rosenstock J, Tran MTD, Wadden TA, Wharton S, Yokote K, Zeuthen N, Kushner RF; STEP 1 Study Group. Once-Weekly Semaglutide in Adults with Overweight or Obesity. N Engl J Med. 2021 Mar 18;384(11):989-1002. doi: 10.1056/NEJMoa2032183. Epub 2021 Feb 10.
PMID: 33567185RESULTSchattenberg JM, Gronbaek H, Kliers I, Ladelund S, Long MT, Nygard SB, Sanyal AJ, Davies MJ. Proteomic signatures reflect effects of semaglutide treatment for MASH. JHEP Rep. 2025 Jul 22;7(10):101521. doi: 10.1016/j.jhepr.2025.101521. eCollection 2025 Oct.
PMID: 40980163DERIVEDKral P, Holst-Hansen T, Olivieri AV, Ivanescu C, Lamotte M, Larsen S. The Correlation Between Body Mass Index and Health-Related Quality of Life: Data from Two Weight Loss Intervention Studies. Adv Ther. 2024 Nov;41(11):4228-4247. doi: 10.1007/s12325-024-02932-8. Epub 2024 Sep 24.
PMID: 39316288DERIVEDWadden TA, Brown GK, Egebjerg C, Frenkel O, Goldman B, Kushner RF, McGowan B, Overvad M, Fink-Jensen A. Psychiatric Safety of Semaglutide for Weight Management in People Without Known Major Psychopathology: Post Hoc Analysis of the STEP 1, 2, 3, and 5 Trials. JAMA Intern Med. 2024 Nov 1;184(11):1290-1300. doi: 10.1001/jamainternmed.2024.4346.
PMID: 39226070DERIVEDMcGowan BM, Houshmand-Oeregaard A, Laursen PN, Zeuthen N, Baker-Knight J. Impact of BMI and comorbidities on efficacy of once-weekly semaglutide: Post hoc analyses of the STEP 1 randomized trial. Obesity (Silver Spring). 2023 Apr;31(4):990-999. doi: 10.1002/oby.23732. Epub 2023 Mar 6.
PMID: 36876594DERIVEDHeerspink HJL, Apperloo E, Davies M, Dicker D, Kandler K, Rosenstock J, Sorrig R, Lawson J, Zeuthen N, Cherney D. Effects of Semaglutide on Albuminuria and Kidney Function in People With Overweight or Obesity With or Without Type 2 Diabetes: Exploratory Analysis From the STEP 1, 2, and 3 Trials. Diabetes Care. 2023 Apr 1;46(4):801-810. doi: 10.2337/dc22-1889.
PMID: 36801984DERIVEDKosiborod MN, Bhatta M, Davies M, Deanfield JE, Garvey WT, Khalid U, Kushner R, Rubino DM, Zeuthen N, Verma S. Semaglutide improves cardiometabolic risk factors in adults with overweight or obesity: STEP 1 and 4 exploratory analyses. Diabetes Obes Metab. 2023 Feb;25(2):468-478. doi: 10.1111/dom.14890. Epub 2022 Oct 28.
PMID: 36200477DERIVEDPerreault L, Davies M, Frias JP, Laursen PN, Lingvay I, Machineni S, Varbo A, Wilding JPH, Wallenstein SOR, le Roux CW. Changes in Glucose Metabolism and Glycemic Status With Once-Weekly Subcutaneous Semaglutide 2.4 mg Among Participants With Prediabetes in the STEP Program. Diabetes Care. 2022 Oct 1;45(10):2396-2405. doi: 10.2337/dc21-1785.
PMID: 35724304DERIVEDWilding JPH, Batterham RL, Davies M, Van Gaal LF, Kandler K, Konakli K, Lingvay I, McGowan BM, Oral TK, Rosenstock J, Wadden TA, Wharton S, Yokote K, Kushner RF; STEP 1 Study Group. Weight regain and cardiometabolic effects after withdrawal of semaglutide: The STEP 1 trial extension. Diabetes Obes Metab. 2022 Aug;24(8):1553-1564. doi: 10.1111/dom.14725. Epub 2022 May 19.
PMID: 35441470DERIVEDO'Neil PM, Birkenfeld AL, McGowan B, Mosenzon O, Pedersen SD, Wharton S, Carson CG, Jepsen CH, Kabisch M, Wilding JPH. Efficacy and safety of semaglutide compared with liraglutide and placebo for weight loss in patients with obesity: a randomised, double-blind, placebo and active controlled, dose-ranging, phase 2 trial. Lancet. 2018 Aug 25;392(10148):637-649. doi: 10.1016/S0140-6736(18)31773-2. Epub 2018 Aug 16.
PMID: 30122305DERIVED
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Results Point of Contact
- Title
- Clinical Reporting Anchor and Disclosure (1452)
- Organization
- Novo Nordisk A/S
Study Officials
- STUDY DIRECTOR
Clinical Reporting Anchor and Disclosure (1452)
Novo Nordisk A/S
Publication Agreements
- PI is Sponsor Employee
- No
- Restriction Type
- OTHER
- Restrictive Agreement
- Yes
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- QUADRUPLE
- Who Masked
- PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
- Masking Details
- Sponsor staff involved in the clinical trial is masked according to company standard procedures.
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
May 25, 2018
First Posted
June 7, 2018
Study Start
June 4, 2018
Primary Completion
March 30, 2020
Study Completion
March 5, 2021
Last Updated
November 19, 2021
Results First Posted
August 11, 2021
Record last verified: 2021-11
Data Sharing
- IPD Sharing
- Will share
According to the Novo Nordisk disclosure commitment on novonordisk-trials.com