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Completed

NCT Number: NCT01909258

Pelvic Area Extension Measurements for Four Types of Lumbopelvic Balance Using Three Different Methods

The main objective of this study is to describe for the first time the expansion reserve of the pelvic area (measurements using the EOS system) for each of the four morphotypes (Roussouly classification) commonly found in a population of healthy volunteers.

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Key information

Conditions

Healthy Volunteer

Age range

20 year–40 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

CHU de Montpellier - Hôpital Lapeyronie, Montpellier, France

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About this study

Secondary objectives:

A. The intra-judge reproducibility and the interrater reliability for the different tools used to measure hip extension will be evaluated. Intra-judge reproducibility (photography) and interrater reliability (goniometry and photography) for the different tools used for measuring hip extension will be evaluated.

B. The concordance between EOS measurements and measurements acquired via goniometry and photography will be evaluated.

C. Describe certain radiographic measurements via the EOS system for the four morphotypes

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • The healthy volunteer must have given his/her informed and signed consent
  • The healthy volunteer must be insured or beneficiary of a health insurance plan

Exclusion criteria

  • The healthy volunteer is participating in another study
  • The healthy volunteer is in an exclusion period determined by a previous study
  • The healthy volunteer is under judicial protection, under tutorship or curatorship
  • The healthy volunteer refuses to sign the consent
  • It is impossible to correctly inform the healthy volunteer
  • The healthy volunteer is pregnant, parturient, or breastfeeding
  • The healthy volunteers had a history of chronic pain or surgery at the hip, the thoracolumbar spine or the sacroiliac area
  • The healthy volunteer has a hip, knee or ankle abnormality

Treatment and study plan

Goniometric measure of pelvic extension reserve.

Other

The pelvic extension reserve (°) is measured via goniometry.

The goniometric measurements will be taken once by an investigator on all subjects and once by a different investigator on half of the subjects (with balanced distribution of morphotypes).

Photographic measure of pelvic extension reserve.

Other

The pelvic extension reserve (°) is measured using photography.

Photographic measurements will be performed twice one investigator and 1 time by a different investigator (total of three measurements).

EOS measure of pelvic extension reserve.

Other

The pelvic extension reserve (°) is measured using the imaging system EOS.

Five X-rays will be made for each volunteer on the EOS system. The first is a frontal shot in a bipedal position, reference snapshot for verifying the absence of spinal deformity or hip pathology. The second and third are profile shots, one on the left and one on the right, whole body, bipedal position; serving as a reference picture. The fourth is profile shot, whole body, with the left hip in hyperextension. For maximum left hip hyperextension, the right leg rests on a step of varying height, and the hip is maximally flexed. The fifth is a profile shot, full body, with the right hip in hyperextension. For a maximum right hip hyperextension, the left leg rests on a step of varying height, and the hip is maximally flexed.

Primary outcomes

  1. EOS measurement of intrinsic reserve extension = angular variation of the sacral slope (left and right sides)

    Time frame: baseline (day 0)

    = RIEeos

  2. EOS measurement of extrinsic extension reserve

    Time frame: Baseline (day 0)

    = REEeos = angular variation of a specific angle (line joining the center of the sacral plate and the midpoint of the segment involving the center of the femoral head and the line joining this point to the top of the intercondylar knee notch) (left and right sides)

  3. EOS measurement of global extension reserve

    Time frame: Baseline (day 0)

    = RIEeos + REEeos (left and right sides)

Secondary outcomes

  1. Goniometric measurement of global extension reserve

    Time frame: baseline (day 0)

    (left and right sides)

  2. Photographic measurement of global extension reserve

    Time frame: baseline (day 0)

    (left and right sides)

  3. Roussouly classification: 1, 2, 3 or 4

    Time frame: baseline (day 0)

  4. Pelvic incidence (°)

    Time frame: Baseline (day 0)

    Pelvic Incidence is defined as the angle between two lines: the line perpendicular to the sacral endplate at the middle of the sacral endplate to the line between the middle of the sacral endplate to the middle of the femoral heads.

  5. Standing sacral slope at rest

    Time frame: Baseline (day 0)

  6. Standing sacral slope in extension

    Time frame: Baseline (day 0)

  7. Standing pelvic tilt at rest

    Time frame: Baseline (day 0)

  8. Standing pelvic tilt in extension

    Time frame: Baseline (day 0)

  9. Standing anterior pelvic plane

    Time frame: Baseline (day 0)

  10. The front acetabular inclination while standing

    Time frame: Baseline (day 0)

  11. The sagittal acetabular inclination while standing

    Time frame: Baseline (day 0)

Sponsors and collaborators

Lead sponsor

Centre Hospitalier Universitaire de Nīmes

Other

Registry information

Official study title

Comparison and Reproducibility of Pelvic Area Extension Measurements for Four Types of Lumbopelvic Balance Using Three Different Methods: Clinical Observation Versus Photography Versus the EOS Imaging System

Acronym: CRESPEOS

Important dates

Study start
2015
Primary completion
2016
Study completion
2016
First posted
Jul 26, 2013
Registry last updated
Dec 22, 2025

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

View the official ClinicalTrials.gov record (opens in a new tab)

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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