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NCT Number: NCT07666425

ASSESSMENT OF THE NATURAL HISTORY AND PROGNOSTIC FACTORS OF THERAPEUTIC RESPONSE IN SUB-PHENOTYPES OF PATIENTS WITH OBESITY: THE BOLOBE STUDY

The study is observational and single-center and involves (i) the establishment of a retrospective and prospective data collection, and (ii) the development of prognostic and predictive models of response to obesity therapies using statistical modeling and machine learning techniques, exclusively for research purposes.

Data collection will be carried out for each patient diagnosed with obesity or overweight whose first visit to the center occurred from January 1, 2000 up to the start of the study, as well as for patients accessing the center during the subsequent 5 years, including patients who died or were lost to follow-up.

With respect to the primary objective, an interim analysis is planned on the retrospective cohort only, once the collection of data already available at study start has been completed for patients with at least 5 years of follow-up.

Data related to instrumental and laboratory examinations and therapeutic interventions, including pharmacological treatments and group-based educational and behavioral therapies, conducted in accordance with routine clinical practice and the most recent relevant national and international guidelines, will be extracted from the electronic health records routinely used at the study center.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

IRCCS Azienda Ospedaliero - Universitaria di Bologna

Bologna, 40138, Italy

Location status: Recruiting

Location contact

Maria Letizia Petroni, MD

CONTACT

[email protected]

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Age ≥ 18 years
  • Body mass index (BMI) ≥ 30 kg/m², or BMI ≥ 25 kg/m² with at least one cardiometabolic comorbidity
  • Provision of written informed consent

Exclusion criteria

  • Obesity secondary to hypothalamic-pituitary disorders
  • Obesity secondary to adrenal disorders
  • Syndromic obesity

Treatment and study plan

Primary outcomes

  1. Incidence of cardiometabolic events at 5 and 10 years

    Time frame: Up to 10 years

    Occurrence of cardiometabolic events over 5- and 10-year follow-up, including:

    • Type 2 diabetes mellitus
    • Atrial fibrillation
    • Ischemic heart disease
    • Ischemic stroke
    • Peripheral arterial disease
    • Metabolic dysfunction-associated steatohepatitis (MASH)
    • Obesity-associated nephropathy

Secondary outcomes

  1. Identification of obesity phenotypes and their association with clinical outcomes

    Time frame: Baseline characteristics and outcomes assessed up to 10 years

    Identification of homogeneous patient subgroups based on clinical, metabolic, and demographic characteristics, and evaluation of their association with cardiometabolic outcomes.

Study contacts

Contact information is provided by the study sponsor or research team.

Maria Letizia Petroni, MD

CONTACT

[email protected]

0512143281

Sponsors and collaborators

Lead sponsor

IRCCS Azienda Ospedaliero-Universitaria di Bologna

Other

Registry information

Official study title

ASSESSMENT OF THE NATURAL HISTORY AND PROGNOSTIC FACTORS OF THERAPEUTIC RESPONSE IN SUB-PHENOTYPES OF PATIENTS WITH OBESITY: THE BOLOBE STUDY (BOLOgna for OBEsity Follow-up BOLOBE)

Acronym: BOLOBE

Important dates

Study start
2026
Primary completion
2036
Study completion
2038
First posted
Jun 24, 2026
Registry last updated
Jun 24, 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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