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Completed

NCT Number: NCT05931380

A Study of Once-Daily Oral Orforglipron (LY3502970) in Japanese Adult Participants With Obesity Disease

The main purpose of this study is to investigate the efficacy and safety of oral orforglipron in participants with obesity disease with obesity-related health problems.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Nishiyamadou Keiwa Hospital, Naka, Ibaraki, Japan

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Participants with a BMI ≥27 kg/m² and <35 kg/m² and at least 2 obesity-related health problems (treated or untreated), OR a BMI ≥35 kg/m² and at least 1 obesity-related health problem (treated or untreated). At least one obesity-related health problem should be hypertension, dyslipidemia or T2D (approximately 25% of participants).
  • Have a history of at least one self-reported unsuccessful dietary effort to lose body weight.
  • Males and females may participate in this trial. Female participants must not be pregnant, intending to be pregnant, breastfeeding, or intending to breastfeed.
  • Contraceptive use by participants should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
  • No male contraception is required except in compliance with specific local government study requirements.

Exclusion criteria

  • For participants with Type 2 Diabetes (T2D):
  • Have Type 1 Diabetes (T1D), history of ketoacidosis or hyperosmolar state/coma, or any other types of diabetes except T2D.
  • Have had 1 or more episode of severe hypoglycemia and/or 1 or more episode of hypoglycemia unawareness within the 180 days prior to screening.
  • Have renal impairment measured as estimated glomerular filtration rate (eGFR) <15 mL/min/1.73 m², calculated by Japanese Society of Nephrology coefficient-modified chronic kidney disease-epidemiology equation during screening.
  • Have a known clinically significant gastric emptying abnormality.
  • For participants without Type 2 diabetes (T2D): Have any type of diabetes with hemoglobin A1c (HbA1c) ≥6.5 %.
  • Have a self-reported change in body weight >5 kg (11 pounds) within 90 days prior to screening.
  • Have chronic kidney disease.
  • Have lupus or rheumatoid arthritis.
  • Have the following cardiovascular conditions within 90 days prior to screening.
  • Have acute or chronic hepatitis.

Treatment and study plan

Orforglipron

Drug

Administered orally

Placebo

Drug

Administered orally

Primary outcomes

  1. Percent Change From Baseline in Body Weight at Week 72

    Time frame: Baseline, Week 72

    Values reported as "LS Mean" are model-based estimates (MBE) of the adjusted (unconditional) treatment effect. MBEs was calculated using an analysis of covariance (ANCOVA) model with the following variables: treatment group, baseline value, baseline Body Mass Index (BMI) category (<35 kilogram per meter square [kg/m²] or ≥35 kg/m²), and stratification factors (sex and baseline type 2 diabetes status). Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no).

  2. Percentage of Participants Who Achieved With Greater Than or Equal to (≥) 5% Body Weight Reduction From Baseline

    Time frame: Baseline to Week 72

    Percentage of participants with ≥5% body weight reduction was analysed by Logistic regression with the following variables: treatment group, baseline value, baseline BMI category (<35 kg/m² or ≥35 kg/m²), and stratification factors (sex and baseline type 2 diabetes status). Stratification factors were defined by the combination of sex (female, male) and baseline type 2 diabetes status (yes, no). The model also allowed the treatment effect to vary across baseline values and stratification factors.

Secondary outcomes

  1. Percentage of Participants Who Achieved ≥10% Body Weight Reduction From Baseline

    Time frame: Baseline to Week 72

    Percentage of participants with ≥10% body weight reduction was analysed by Logistic regression with the following variables: treatment group, baseline value, baseline BMI category (<35 kg/m² or ≥35 kg/m²), and stratification factors (sex and baseline type 2 diabetes status). Stratification factors were defined by the combination of sex (female, male) and baseline type 2 diabetes status (yes, no). The model also allowed the treatment effect to vary across baseline values and stratification factors.

  2. Percentage of Participants Who Achieved ≥15% Body Weight Reduction From Baseline

    Time frame: Baseline to Week 72

    Percentage of participants with ≥15% body weight reduction was analysed by Logistic regression with the following variables: treatment group, baseline value, baseline BMI category (<35 kg/m² or ≥35 kg/m²), and stratification factors (sex and baseline type 2 diabetes status). Stratification factors were defined by the combination of sex (female, male) and baseline type 2 diabetes status (yes, no). The model also allowed the treatment effect to vary across baseline values and stratification factors.

  3. Percentage of Participants Who Achieved ≥20% Body Weight Reduction From Baseline

    Time frame: Baseline to Week 72

    Percentage of participants with ≥20% body weight reduction was analysed by Logistic regression with the following variables: treatment group, baseline value, baseline BMI category (<35 kg/m² or ≥35 kg/m²), and stratification factors (sex and baseline type 2 diabetes status). Stratification factors were defined by the combination of sex (female, male) and baseline type 2 diabetes status (yes, no). The model also allowed the treatment effect to vary across baseline values and stratification factors.

  4. Change From Baseline in Body Mass Index (BMI) at Week 72

    Time frame: Baseline, Week 72

    Values reported as "LS Mean" are model-based estimates (MBE) of the adjusted (unconditional) treatment effect. MBE was calculated using an ANCOVA model with the following variables: baseline, treatment, baseline BMI group, and strata in the model, including treatment-by-baseline and treatment-by-strata interaction terms. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no). The model also allowed the treatment effect to vary across baseline values and stratification factors.

  5. Percentage of Participants Who Had Improvements in Hypertension

    Time frame: Baseline to Week 72

    Percentage of participants achieving hypertension improvement ((Systolic blood pressure <130 mmHg and diastolic blood pressure <80 mmHg) was analysed using logistic regression with the following variables: treatment, baseline BMI group, and strata in the model. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no). The estimates (odds ratio and corresponding confidence intervals) were derived using observed data.

  6. Percentage of Participants Who Had Improvements in Dyslipidemia

    Time frame: Baseline to Week 72

    Percentage of participants achieving dyslipidemia improvement (Low-density lipoprotein cholesterol <140 milligrams per deciliter (mg/dL), triglycerides <150 mg/dL, and high-density lipoprotein cholesterol ≥40 mg/dL) was analysed using logistic regression with the following variables: treatment, baseline BMI group, and strata in the model. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no). The estimates (odds ratio and corresponding confidence intervals) were derived using observed data.

  7. Percentage of Participants Who Achieve Hemoglobin A1c (HbA1c) Target Value (<6.5% [48 mmol/Mol])

    Time frame: Baseline to Week 72

    Percentage of participants achieving HbA1c <6.5% was analysed using logistic regression with the following variables: baseline, treatment, baseline BMI group, and sex in the model, including treatment-by-baseline and treatment-by-sex interaction terms.

  8. Mean Change From Baseline in Visceral Adipose Tissue (VAT) at Week 72

    Time frame: Baseline, Week 72

    Values represented under "LS Mean" are model-based estimates (MBE) of the unconditional average treatment effect. MBE was calculated using an ANCOVA model with the following variables: baseline, treatment, baseline BMI group, and strata in the model, including treatment-by-baseline and treatment-by-strata interaction terms. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no).

  9. Mean Change From Baseline in Waist Circumference at Umbilical Level at Week 72

    Time frame: Baseline, Week 72

    Values represented under "LS Mean" are model-based estimates (MBE) of the unconditional average treatment effect. MBE was calculated using an ANCOVA model with the following variables: baseline, treatment, baseline BMI group, and strata in the model, including treatment-by-baseline and treatment-by-strata interaction terms. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no).

  10. Mean Change From Baseline in Systolic Blood Pressure (SBP) at Week 72

    Time frame: Baseline, Week 72

    Values represented under "LS Mean" are model-based estimates (MBE) of the unconditional average treatment effect. MBE was calculated using an ANCOVA model with the following variables: baseline, treatment, baseline BMI group, and strata in the model, including treatment-by-baseline and treatment-by-strata interaction terms. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no).

  11. Percent Change From Baseline in Non-High Density Lipoprotein (Non-HDL) at Week 72

    Time frame: Baseline, Week 72

    Values represented as LS means are model-based estimates (MBE) of the unconditional average treatment effect on the log-transformed scale. MBE was calculated using an ANCOVA model for log(Actual Value/Baseline), including log-transformed baseline, treatment, baseline BMI group, and strata (defined by joint levels of sex [female, male] and baseline type 2 diabetes status [yes, no]) as covariates, with treatment-by-log(baseline) and treatment-by-strata interaction terms included in the model.

  12. Percent Change From Baseline in High Density Lipoprotein (HDL) at Week 72

    Time frame: Baseline, Week 72

    Values represented as LS means are model-based estimates (MBE) of the unconditional average treatment effect on the log-transformed scale. MBE was calculated using an ANCOVA model for log(Actual Value/Baseline), including log-transformed baseline, treatment, baseline BMI group, and strata (defined by joint levels of sex [female, male] and baseline type 2 diabetes status [yes, no]) as covariates, with treatment-by-log(baseline) and treatment-by-strata interaction terms included in the model.

  13. Percent Change From Baseline in Triglycerides at Week 72

    Time frame: Baseline, Week 72

    Values represented as LS means are model-based estimates (MBE) of the unconditional average treatment effect on the log-transformed scale. MBE was calculated using an ANCOVA model for log(Actual Value/Baseline), including log-transformed baseline, treatment, baseline BMI group, and strata (defined by joint levels of sex [female, male] and baseline type 2 diabetes status [yes, no]) as covariates, with treatment-by-log(baseline) and treatment-by-strata interaction terms included in the model.

  14. Mean Change From Baseline in Fasting Glucose at Week 72

    Time frame: Baseline, Week 72

    Values represented under "LS Mean" are model-based estimates (MBE) of the unconditional average treatment effect. MBE was calculated using an ANCOVA model with the following variables: baseline, treatment, baseline BMI group, and strata in the model, including treatment-by-baseline and treatment-by-strata interaction terms. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no).

  15. Mean Change From Baseline in Hemoglobin A1c (HbA1c) at Week 72

    Time frame: Baseline, Week 72

    • Hemoglobin A1c (HbA1c) is the glycosylated fraction of hemoglobin A, measured to reflect average plasma glucose concentration over prolonged periods of time.
    • Values represented under "LS Mean" are model-based estimates (MBE) of the unconditional average treatment effect. MBE was calculated using an ANCOVA model with the following variables: baseline, treatment, baseline BMI group, and strata in the model, including treatment-by-baseline and treatment-by-strata interaction terms. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no).
  16. Mean Change From Baseline in High-sensitivity C-reactive Protein at Week 72

    Time frame: Baseline, Week 72

    Values represented under "LS Mean" are model-based estimates (MBE) of the unconditional average treatment effect. MBE was calculated using a mixed model for repeated measures (MMRM) with the following variables: baseline BMI group, baseline-by-time-by-treatment, and strata-by-time-by-treatment interaction terms in the model. Strata were defined by joint levels of sex (female, male) and baseline type 2 diabetes status (yes, no). An unstructured variance-covariance matrix was used.

  17. Time to Onset of Type 2 Diabetes (T2D)

    Time frame: Up to Week 72

    Time to event was defined as the duration from randomization to adjudication committee-confirmed diagnosis of type 2 diabetes mellitus (T2D). Descriptive statistics are presented as Kaplan-Meier estimates of time to onset of T2D (in weeks). Time to onset of T2D was also analyzed using a Cox proportional hazards model, with treatment (pooled orforglipron dose groups) and sex as factors and baseline fasting serum glucose as a covariate. Hazard ratios with corresponding confidence intervals were estimated and reported in statistical analysis. Statistical significance between treatment groups was assessed using a two-sided log-rank test.

  18. Mean Change From Baseline in Short Form 36 Version 2 (SF-36v2) Acute Form For Domain and Component Scores at Week 72

    Time frame: Baseline, Week 72

    The SF-36v2 acute form, 1-week recall assesses participants' health-related quality of life on 8 domains: Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and Mental Health. Each domain is scored individually and information from these 8 domains is further aggregated into 2 health component summary scores, a Physical Component Summary, and a Mental Component Summary. Items are answered on Likert scales of varying lengths (3-point, 5-point, or 6-point scales). Scoring of each domain and both summary scores are norm based and presented in the form of T scores, with mean of 50 and standard deviation of 10; higher scores indicate better levels of function and/or better health. Range cannot be specified in norm-based scores.

  19. Mean Change From Baseline in Impact of Weight on Quality-of-Life Lite Clinical Trials Version (IWQOL-Lite-CT) of Physical Function, Physical, and Psychosocial Composite Score at Week 72

    Time frame: Baseline, Week 72

    The IWQOL-Lite-CT is a 20-item, obesity-specific patient reported outcome instrument developed for use in obesity clinical trials. It assesses 2 primary domains of obesity-related health-related quality of life: physical (7 items), and psychosocial (13 items). A 5-item subset of the physical domain, the physical-function composite is also supported. Items in the physical-function composite describe physical impacts related to general and specific physical activities. All items are rated on either a 5-point frequency ("never" to "always") scale or a 5-point truth ("not at all true" to "completely true") scale. The two domain scores (Physical and Psychosocial) and composite score (Physical function) range from 0 to 100 with higher scores indicating greater functioning. Raw scores are then linearly transformed to a 0 (worst) -100 (best) scale using: 100×(average item score-1)/4. Higher scores indicate better quality of life/function; lower scores indicate greater impairment.

  20. Pharmacokinetics (PK): Mean Plasma Concentration of Orforglipron

    Time frame: Pre-dose at Weeks 8, 24, and 48; post-dose at Week 16 (4 to 12 hours) and Week 36 (1 to 4 hours)

    Plasma concentrations of orforglipron were measured at predefined pre-dose and post-dose sampling time points.

Sponsors and collaborators

Lead sponsor

Eli Lilly and Company

Industry

Registry information

Official study title

A Phase 3, Randomized, Double-Blind Study to Investigate the Efficacy and Safety of Once-Daily Oral LY3502970 Compared With Placebo in Japanese Adult Participants With Obesity Disease

Acronym: ATTAIN-J

Important dates

Study start
2023
Primary completion
2025
Study completion
2025
First posted
Jul 5, 2023
Registry last updated
Jul 20, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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