The Predictive Value of Lower Extremity Hypertonia on Neurogenic Detrusor Overactivity After Spinal Cord Injury

July 9, 2026 updated by: Xue Jiang, Shengjing Hospital

The Predictive Value of Increased Lower Limb Muscle Tone on Neurogenic Detrusor Overactivity in Patients With Spinal Cord Injury: A Retrospective Analysis

The goal of this observational study is to evaluate whether increased lower extremity muscle tone can serve as an independent predictor of neurogenic detrusor overactivity (NDO) in adult patients (aged 18-80 years) with upper sacral spinal cord injury .

The main questions it aims to answer are:

Is increased lower extremity muscle tone independently associated with the presence of detrusor overactivity after adjusting for age, sex, injury level, injury type, and injury cause?

Does the predictive value of muscle tone for detrusor overactivity differ across subgroups defined by injury level, injury severity, and time since injury?

Researchers will compare patients with lower extremity hypertonia (Modified Ashworth Scale ≥ 1) to patients with normal muscle tone (Modified Ashworth Scale = 0) to see if muscle tone elevation independently predicts detrusor overactivity.

Participants will not be asked to do anything beyond their routine clinical care, as this is a retrospective study that only collects data from existing medical records, including neurological examination results, Modified Ashworth Scale scores, and urodynamic study reports.

Study Overview

Status

Not yet recruiting

Conditions

Study Type

Observational

Enrollment (Estimated)

300

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

This study looks at adults aged 18 to 80 with suprasacral Spinal Cord Injury who stayed at the Shengjing Hospital of China Medical University from January 2020 to January 2025. All participants have full medical records, including neurological exams, Modified Ashworth Scale checks, and urodynamic test results. Anyone missing key data or with assessments spaced out by more than two weeks was left out.

Description

Inclusion Criteria:

Diagnosis of spinal cord injury confirmed by CT or MRI imaging

Suprasacral spinal cord injury according to the International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI, 2011 revision)

Age between 18 and 80 years

Complete medical records, including detailed neurological examination, Modified Ashworth Scale assessment, and urodynamic study report

Exclusion Criteria:

Critical missing information in medical records or urodynamic reports

Interval between Modified Ashworth Scale assessment and urodynamic study exceeding 2 weeks

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Hypertonia Group
Patients with lower extremity hypertonia, defined as a Modified Ashworth Scale (MAS) score of 1 or higher at admission.
Normal Tone Group
Patients with normal lower extremity muscle tone, defined as a Modified Ashworth Scale (MAS) score of 0 at admission.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Presence of Neurogenic Detrusor Overactivity Confirmed by Urodynamic Study
Time Frame: Baseline (At hospital admission)
Neurogenic detrusor overactivity (NDO) is defined as the presence of involuntary detrusor contractions during the filling phase of a urodynamic study, according to International Continence Society (ICS) standards. Urodynamic studies were performed as part of routine clinical care during the hospital admission. This outcome measures the presence or absence of NDO based on the urodynamic report. The result is reported as a binary outcome (present/absent).
Baseline (At hospital admission)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Shengjing Hospital

Investigators

  • Principal Investigator: Xue Jiang, Rehabilitation Center of Shengjing Hospital, China Medical University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

July 7, 2026

Primary Completion (Estimated)

December 31, 2026

Study Completion (Estimated)

June 14, 2027

Study Registration Dates

First Submitted

July 6, 2026

First Submitted That Met QC Criteria

July 9, 2026

First Posted (Actual)

July 10, 2026

Study Record Updates

Last Update Posted (Actual)

July 10, 2026

Last Update Submitted That Met QC Criteria

July 9, 2026

Last Verified

July 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2026PS1154K

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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