Triaxial Accelerometry Study

April 2, 2026 updated by: Rijnstate Hospital

Physical Activity in Patients After Resurfacing and Total Hip Arthroplasty: an Observational Follow-up Study 15 Years After Surgery.

This study looks at how physical activity levels are in the long term after hip surgery. Arthritis can make everyday movement difficult, and hip replacement surgeries-such as total hip arthroplasty (THA) and hip resurfacing-help reduce pain and improve function. However, it is not clear how these surgeries affect long-term physical activity.

To learn more, researchers are following up with patients who had one of these surgeries 15 years ago. Participants will wear two small activity-tracking devices (accelerometers): one on their wrist for 10 days and one on their thigh for 48 hours. These devices will measure how much and how intensely they move. Participants will also complete short physical activity questionnaires.

By comparing activity levels between the two types of hip surgery, the study aims to understand their long-term effects on mobility and health. The results could help doctors improve treatment and recovery plans for future patients. All data will be kept private, and participation is voluntary.

Study Overview

Status

Active, not recruiting

Conditions

Detailed Description

Arthritis significantly impacts patients' quality of life, leading to pain, fatigue, and reduced mobility. Treatment strategies include medication, lifestyle changes, and surgical interventions such as total hip arthroplasty (THA) and hip resurfacing. While these procedures improve function and alleviate pain, their long-term effects on physical activity levels remain unclear. Given the importance of physical activity in maintaining health and reducing mortality risks, understanding post-surgical activity levels is crucial.

Wearable technology has revolutionized the measurement of physical activity, providing objective, large-scale data collection. This study utilizes accelerometers to evaluate physical activity in patients who underwent hip resurfacing or THA 15 years ago. By comparing these groups, researchers aim to understand the long-term impact of different surgical interventions on mobility and activity levels.

The primary objective of the study is to compare the volume and intensity of physical activity in patients who underwent hip resurfacing versus those who had a total hip replacement. We will also explore associations between physical activity levels and functional outcome scores.

This is a cross-sectional observational study involving a follow-up of patients who participated in a randomized controlled trial 15 years ago. Participants will be asked to complete questionnaires and wear two different accelerometers to monitor their physical activity. They will wear a GENEActiv triaxial accelerometer on the non-dominant wrist for 10 days and nights. They will also wear an Axivity AX3 Logging triaxial accelerometer on the surgical thigh for 48 hours. Both will measure physical activity energy expenditure (PAEE), intensity distribution of PAEE, and step count.

All participants will receive an information letter and provide informed consent before participation. Data privacy will be maintained through coded identifiers, and no personally identifiable information will be stored with the accelerometry data.

This study will provide valuable insights into the long-term mobility outcomes of patients who have undergone hip resurfacing or total hip arthroplasty. The findings will help clinicians understand the implications of surgical choices on patients' activity levels and overall health, potentially influencing future treatment recommendations and rehabilitation strategies.

Study Type

Observational

Enrollment (Estimated)

60

Contacts and Locations

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

Study Locations

  • Netherlands
    • Gelderland
      • Arnhem, Gelderland, Netherlands, 6815 AB
        • Rijnstate Hospital
  • United Kingdom
      • London, United Kingdom, W12 0BZ
        • Imperial College London

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

Patients that have previously participated in a randomised controlled trial during which they received either hip resurfacing or total hip arthroplasty.

Description

Inclusion Criteria:

• Patient must have participated in a previous randomised controlled trial that was conducted in Rijnstate hospital between 2007-2008.

Exclusion Criteria:

• None.

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
Resurfacing Hip Arthroplasty
Patients 15 years after hip resurfacing surgery
Total Hip Arthroplasty
Patients 15 years after Total Hip Arthroplasty

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Objective physical activity
Time Frame: Physical activity measured continuously for a duration of 10 days
Physical activity energy expenditure (PAEE) and physical activity intensity distribution as measured by two accelerometers
Physical activity measured continuously for a duration of 10 days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Self-reported physical activity
Time Frame: Seven days prior to the first day of accelerometer use
Self-reported physical activity using a Dutch version of the International Physical Activity Questionnaire - Short Form (IPAQ-SF).
Seven days prior to the first day of accelerometer use
Self-reported physical activity
Time Frame: Seven days prior to the first day of accelerometer use
Self-reported physical activity using a Dutch version of the Short Questionnaire to Assess health-enhancing physical activity (SQUASH).
Seven days prior to the first day of accelerometer use

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Step count
Time Frame: Daily steps taken over a period of 10 days
The participants' daily number of steps taken as measured by two accelerometers
Daily steps taken over a period of 10 days

Collaborators and Investigators

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

Sponsor

Rijnstate Hospital

Collaborators

Imperial College London

Investigators

  • Principal Investigator: Job LC Susante, MD, PhD, Stichting Rijnstate Ziekenhuis

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Actual)

November 22, 2025

Primary Completion (Actual)

April 1, 2026

Study Completion (Estimated)

August 1, 2026

Study Registration Dates

First Submitted

March 5, 2025

First Submitted That Met QC Criteria

March 12, 2025

First Posted (Actual)

March 19, 2025

Study Record Updates

Last Update Posted (Actual)

April 3, 2026

Last Update Submitted That Met QC Criteria

April 2, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2025-2605
  • 2025-17970 (Other Identifier: METC Oost-Nederland)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

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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