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NCT Number: NCT03891563

Prospective Evaluation of Sport Activity and the Development of Femoroacetabular Impingement in the Adolescent Hip

Femoroacetabular impingement (FAI) is a condition of the hip where there is a mis-fit between the femoral head (ball) and hip acetabulum (socket). The abnormalities on the hip bones collide or "impinge" during movements such as hip flexion and rotation. Typically, patients with this condition are young adults who present with hip pain, loss of hip function, and in many cases, osteoarthritis later in life. The rate of diagnoses of FAI has dramatically risen across all age groups, but it has been especially notable within adolescent populations. There has been a corresponding increase in the number of surgeries performed on younger and younger hips to treat pain and loss of function due to this condition. Preliminary small-scale research has hypothesized that increased activity, such as sport specialization (i.e. playing only one sport for most of the year) at an early age when the hip is still developing, may be the cause. In the past 20 years, sport injuries among children have dramatically increased, where close to 45 million young athletes participate in organized sports annually in Canada and the US alone. There is a current trend among coaches and parents to have children focus on one sport with the thought that this dedication will allow them to reach an elite level. We are proposing the first international, longitudinal cohort study to determine the effect of sport specialization on the development of FAI during the critical phase of hip development (i.e. between the ages of 12-14 years). Volunteer participants will be recruited across Canada and internationally and will be evaluated clinically and radiographically (i.e. using MRI) over 2 years. This study will not only prospectively evaluate the role of sport activity the development of FAI, but also inform preventative training protocols to potentially reduce its incidence among adolescents, and later as adults, as well as identify parameters to detect hips that are at risk for developing FAI.

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Key information

Conditions

Femoroacetabular Impingement Femoracetabular Impingement Joint Diseases Musculoskeletal Diseases Pathologic Processes Pathological Conditions, Signs and Symptoms

Age range

12 year–14 year

Sex eligibility

All sexes

Study type

Observational

Primary location

McMaster University, Hamilton, Ontario, Canada

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About this study

This is a multi-centre, international longitudinal cohort study evaluating 200 participants between the ages of 12-14 that include sport specialists at the moderate to vigorous physical activity (MVPA) level and non-sport specialists at any activity level. Participant groups will be defined according to the AOSSM and AMSSM early sport specialization criteria (2016). We will monitor physical activity levels of all participants using an activity log and a wrist-mounted activity tracker, with synced data collected every 3 months during the study period. In addition, participants will be evaluated clinically and radiographically at time of enrollment and 6, 12, 18, and 24 months. The primary study outcome is the incidence of FAI between groups at 2 years, determined via MRI. Secondary outcomes include hip function and health-related quality of life between subjects diagnosed with FAI versus no FAI at 2 years, as determined by the HOS and PedsQL questionnaires.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • asymptomatic males and females between the ages of 12-14 years
  • ability to speak, understand, and read the language of the clinical site
  • provision of informed child assent (if applicable) and parental consent.

Exclusion criteria

  • hip is mature (i.e. closed physes) based on the baseline MRI scan
  • hip complaints or pain in the hip
  • previous trauma to the hip
  • previous surgery on the hip
  • significant medical co-morbidities (requiring daily assistance for ADLs)
  • history of or ongoing paediatric hip disease (Legg-Calve-Perthes; slipped capital femoral epiphysis, hip dysplasia)
  • participants that have contraindications and/or are unwilling to undergo an MRI (e.g. claustrophobia)
  • participants who will likely have problems, in the judgment of the investigator, with maintaining follow-up
  • any other reasons the investigator feels is relevant for excluding the subject.

Treatment and study plan

Primary outcomes

  1. Incidence of radiographic FAI

    Time frame: 2 years

    The primary outcome is the incidence of radiographic FAI between groups at 2 years, as determined by the dedicated MRI of the hip. We will identify both symptomatic and asymptomatic cases, where asymptomatic FAI can become symptomatic in young adulthood, and/or could be associated with idiopathic osteoarthritis later in life.

Secondary outcomes

  1. Hip function

    Time frame: 2 years

    As determined by the Hip Outcome Score

  2. Health-related quality of life

    Time frame: 2 years

    As determined by the Pediatric Quality of Life questionnaire

Sponsors and collaborators

Lead sponsor

McMaster University

Other

Collaborators

  • Arthroscopy Association of North America
  • Canadian Institutes of Health Research (CIHR)
  • Conmed
  • McMaster Surgical Association

Registry information

Official study title

Prospective Evaluation of Sport Activity and the Development of Femoroacetabular Impingement in the Adolescent Hip (PREVIEW)

Acronym: PREVIEW

Important dates

Study start
2017
Primary completion
2025
Study completion
2025
First posted
Mar 27, 2019
Registry last updated
Nov 21, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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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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