Assessing the impact of comorbidities on postoperative complications.
Official title: The Role of Concomitant Diseases in Postoperative Complications Risk Stratification - a Prospective Observational Multi-center Cohort Study
Run by Russian Federation of Anesthesiologists and Reanimatologists · NCT03945968 · Data updated 2026-11-12
This study looks at how having other health issues affects the chances of complications after abdominal surgery to help doctors better understand and manage risks for their patients.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 16000 (estimated) |
| Sponsor | Russian Federation of Anesthesiologists and Reanimatologists Academic / other |
| Locations | 38 sites (Arkhangelsk and 37 other locations) |
| Status | Recruiting |
| Started | July 1, 2019 |
| Main results expected | December 30, 2025 |
| Study ends | February 28, 2026 |
| Registry record updated | April 4, 2025 |
| Trial ID | NCT03945968 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates for this study are patients scheduled for abdominal surgery with an ASA physical status class of 1-3.
✕Probably not a fit
Patients with acute conditions such as massive blood loss, bronchospasm, or anaphylactic reactions may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study aims to evaluate the prevalence and structure of comorbidities among patients undergoing abdominal surgery. It seeks to stratify the risk of postoperative complications by identifying independent predictors that contribute to these risks. By analyzing a large cohort of surgical patients, the study will provide insights into how concomitant diseases affect surgical outcomes and mortality rates. The findings could help in developing better risk assessment tools for anesthesiologists and surgeons.
Why it matters
Potential benefit: If successful, this study could lead to improved risk stratification and management of patients undergoing surgery, potentially reducing postoperative complications.
How similar studies have gone: Previous studies have indicated the importance of comorbidities in surgical outcomes, suggesting that this approach has been validated in other contexts.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * surgical interventions on the abdominal organs, * 1-3 ASA physical status class Exclusion Criteria: * the inability to assess the factors included in the study, * acute massive blood loss, aspiration, * bronchospasm, * anaphylactic reactions, * malignant hyperthermia
Where it's running
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The First City Clinical Hospital. n.a. E. E. Volosevich
Arkhangelsk, Russia Recruiting -
Astrakhan State Medical University
Astrakhan, Russia Recruiting -
Chelyabinsk Regional Clinical Center of Oncology and Nuclear Medicine
Chelyabinsk, Russia Recruiting -
South-Ural State Medical University
Chelyabinsk, Russia Recruiting -
Chita state medical Academy of the Ministry of health of the Russian Federation
Chita, Russia Recruiting -
Kazan State Medical University
Kazan', Russia Recruiting
Show 32 more locations
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Republic Clinical Hospital Ministry of Health care of the Republic of Tatarstan
Kazan', Russia Recruiting -
Research Institute for Complex Issues of Cardiovascular Diseases
Kemerovo, Russia Recruiting -
Regional clinical hospital №2
Krasnodar, Russia Recruiting -
Kuban State Medical University
Krasnodar, Russia Recruiting -
Research Institute Regional Clinical Hospital named after S.V. Ochapovsky
Krasnodar, Russia Recruiting -
Krasnoyarsk State Medical University named after Prof. V.F.Voino-Yasenetsky
Krasnoyarsk, Russia Recruiting -
Burnasyan federal medical biophysical center of federal medical biological agency
Moscow, Russia Recruiting -
City clinical hospital named after S.S. Yudin
Moscow, Russia Recruiting -
City clinical hospital №1 named after N.I. Pirogov
Moscow, Russia Recruiting -
City Clinical Hospital. n.a. F.I. Inozemtseva
Moscow, Russia Recruiting -
FGBU "Central clinical hospital with polyclinic" of the President administration of the Russian Federation
Moscow, Russia Recruiting -
Moscow cancer research Institute named after P. A. Herzen
Moscow, Russia Recruiting -
Moscow City Oncological Hospital № 62
Moscow, Russia Recruiting -
Moscow regional research clinical Institute named after M. F. Vladimirsky
Moscow, Russia Recruiting -
National Medical and Surgical Center named after N.I. Pirogov
Moscow, Russia Recruiting -
Privolzhsky district medical center
Nizhny Novgorod, Russia Recruiting -
State Novosibirsk Regional Clinical Hospital
Novosibirsk, Russia Recruiting -
Orenburg Regional Clinical Hospital
Orenburg, Russia Recruiting -
"Republican hospital named after V. A. Baranov"
Petrozavodsk, Russia Recruiting -
Rostov State Medical University
Rostov-on-Don, Russia Recruiting -
North-West State Medical University named after I.I.Mechnikov
Saint Petersburg, Russia Recruiting -
St. Petersburg state budgetary healthcare institution " City clinical Oncology dispensary"
Saint Petersburg, Russia Recruiting -
"Samara Regional Clinical Oncology Dispensary"
Samara, Russia Recruiting -
Clinical Hospital named after SR. Mirotvortseva (FGBOU VO "Saratov State Medical University. n.a. V.I.Razumovsky" Ministry of Health of the Russian Federation
Saratov, Russia Recruiting -
Stavropol regional clinical hospital
Stavropol, Russia Recruiting -
Regional clinical hospital №2
Vladivostok, Russia Recruiting -
Emergency hospital
Volgograd, Russia Recruiting -
Volgograd regional clinical hospital
Volgograd, Russia Recruiting -
Yakut Republican Oncological Dispensary
Yakutsk, Russia Recruiting -
Ekaterinburg City clinical hospital № 40
Yekaterinburg, Russia Recruiting -
Sverdlovsk regional clinicl hospital №1
Yekaterinburg, Russia Recruiting -
Regional Clinical Hospital No. 1
Tyumen, Russia Not yet recruiting
Study contacts
- Principal investigator: Igor Zabolotskikh, MD — Russian Federation of Anesthesiologists and Reanimatologists
- Study coordinator: Nikita Trembach, PhD
- Email: nikitkax@mail.ru
- Phone: +79528589299
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.