Predictors of Length of Stay and DAH30 After Elective Minimally Invasive Surgery in Older Adults (HOME-30)

Predictors of Length of Stay and Days Alive and at Home Within 30 Days (DAH30) After Elective Minimally Invasive Surgery in Older Adults: A Multicenter Retrospective Observational Study With International External Validation

This retrospective observational study aims to evaluate short-term postoperative outcomes in older adults undergoing elective minimally invasive surgery. The primary focus is on patient-centered recovery measures, including length of hospital stay and the number of days patients are alive and at home within 30 days after surgery.

Using routinely collected clinical data, the study will assess demographic, clinical, and perioperative factors associated with delayed discharge and reduced time spent at home after surgery. Understanding these factors may help clinicians and healthcare systems better plan postoperative care and optimize recovery pathways for older surgical patients.

Study Overview

• Status: Completed
• Conditions: Postoperative Recovery
• Intervention / Treatment: Other: No Intervention (Observational Study)

Detailed Description

This is a multicenter, retrospective, observational cohort study designed to identify predictors of short-term postoperative outcomes in older adults undergoing elective minimally invasive surgical procedures.

The study includes patients aged 70 years and older who underwent elective laparoscopic or minimally invasive abdominal surgery. All data are derived exclusively from routinely collected medical records generated during standard clinical care. No study-related interventions, changes in clinical management, or additional patient contacts are performed.

The primary outcomes of interest are length of hospital stay and days alive and at home within 30 days after surgery (HOME-30 / DAH30). Secondary analyses explore the association of demographic characteristics, comorbidities, perioperative factors, and discharge timing with these outcomes.

The study aims to improve understanding of non-medical contributors to prolonged hospitalization in older surgical patients and to support the development of patient-centered outcome measures applicable across different healthcare systems.

• Study Type: Observational
• Enrollment (Actual): 1000

Contacts and Locations

Study Locations

• Russia
  • Moscow, Russia
    • K+31 Clinic

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Older Adult
• Accepts Healthy Volunteers: No

• Sampling Method: Non-Probability Sample

Study Population

Older adult patients aged 70 years and older who underwent elective minimally invasive surgical procedures under general anesthesia in participating centers. All data are collected retrospectively from routine clinical records.

Description

Inclusion Criteria:

• Age 70 years or older at the time of surgery
• Undergoing elective minimally invasive surgical procedures
• Surgery performed under general anesthesia
• Availability of complete medical records required to assess study outcomes

Exclusion Criteria:

• Emergency or urgent surgical procedures
• Open (non-minimally invasive) surgery
• Incomplete medical records precluding outcome assessment

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Older Adults Undergoing Elective Minimally Invasive Surgery; This cohort includes adults aged 70 years and older who underwent elective minimally invasive surgical procedures. The study is retrospective and observational in nature. No interventions were assigned as part of the study; all analyses are based on routinely collected clinical data obtained during standard care.	Other: No Intervention (Observational Study); This is a retrospective observational study. No interventions were assigned or administered as part of the study. All analyses are based on routinely collected clinical data obtained during standard clinical care.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Days Alive and at Home Within 30 Days After Surgery (DAH30)	Days Alive and at Home within 30 days after surgery (DAH30), defined as the total number of days during the first 30 days following the index surgical procedure that the patient is alive and not admitted to an acute care hospital.	Postoperative Day 0 through Postoperative Day 30

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Length of Hospital Stay After Surgery	Length of hospital stay, defined as the number of days from the date of surgery to the date of discharge from the index hospitalization.	Perioperative period
All-Cause Hospital Readmission Within 30 Days After Surgery	Any unplanned hospital readmission for any cause occurring within 30 days after discharge from the index surgical hospitalization.	Postoperative Day 1 through Postoperative Day 30
Postoperative Complications Within 30 Days	Occurrence of postoperative complications within 30 days after surgery, classified according to the Clavien-Dindo grading system.	Postoperative Day 0 through Postoperative Day 30
Discharge Destination After Surgery	Discharge destination following index hospitalization, categorized as home, rehabilitation facility, skilled nursing facility, or other healthcare institution.	Perioperative period

Collaborators and Investigators

• Sponsor: Dmitrii Semenov

Study record dates

Study Major Dates

• Study Start (Actual): January 1, 2015
• Primary Completion (Actual): January 1, 2026
• Study Completion (Actual): January 1, 2026

Study Registration Dates

• First Submitted: January 20, 2026
• First Submitted That Met QC Criteria: January 28, 2026
• First Posted (Actual): January 30, 2026

Study Record Updates

• Last Update Posted (Actual): January 30, 2026
• Last Update Submitted That Met QC Criteria: January 28, 2026
• Last Verified: January 1, 2026

More Information

Terms related to this study

• Keywords: Older adults; Minimally invasive surgery; Postoperative recovery; Days alive and at home
• Additional Relevant MeSH Terms: Investigative Techniques; Methods; Observation
• Other Study ID Numbers: HOME30-RETRO

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: De-identified individual participant data underlying the results reported in the published articles, including demographic characteristics, perioperative variables, comorbidities, surgical details, and outcome measures such as DAH30, length of hospital stay, postoperative complications, readmissions, and discharge destination.
• IPD Sharing Time Frame: Beginning 6 months after publication, with no end date.
• IPD Sharing Access Criteria: Data will be shared upon reasonable request. Requests should include a brief research proposal and will be reviewed by the study investigators. Data will be provided for non-commercial academic research purposes only, following approval and execution of a data use agreement. All shared data will be fully de-identified.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No