Reliability of Sacral Slope, Pelvic Femoral Motion and Cup Ante-inclination on AP Pelvic Radiographs in Healthy Pts

Study Overview
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Brief Summary
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Currently, there are no validated anatomical landmarks that can be used to predict risk of and diagnose abnormal patterns of pelvic motion.This proposed study will measure sacral slope, pelvic femoral angle and cup ante-inclination in both sitting and standing positions, using healthy individuals without a history of spinal and/or lower extremity pathology. All radiographs will be evaluated for the three measurements by four individuals with the intent of evaluating inter-observer reliability. Determining the reproducibility of these angles between observers will give insight into the potential clinical utility of these measurements in evaluating and treating patients with hip-spine syndrome.

Detailed Description
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The purpose of this study is to evaluate the mechanics and influence of spinopelvic motion and balance from normal healthy subjects for the purpose of establishing radiographic measurements which are reliable and reproducible and which could give insight into the potential clinical utility of these measurements as future predictors of who may/may not have spinal pelvic issues and in evaluation and treatment of patients with hip-spine syndrome. This specific objective of this study will be to measure sacral slope, pelvic femoral angle and cup ante-inclination via radiographs in both sitting and standing positions. The radiographs will be evaluated for the three measurements by four individuals with the intent of evaluating inter-observer reliability.

Official Title
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Inter-observer Reliability of Sacral Slope, Pelvic Femoral Motion and Cup Ante-inclination on Anteroposterior Pelvic Radiographs in Healthy Individuals.

Conditions
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Healthy

Intervention / Treatment
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* Diagnostic Test: X-rays- total of 4


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy individuals without major co-morbidities and without spine/hip/pelvis issues including previous injuries or surgeries Exclusion Criteria: no history of spine/hip/pelvis issues females who are trying to get pregnant

Ages Eligible for Study
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Minimum Age: 25 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Females<br>15 females | Diagnostic Test: X-rays- total of 4<br>* X-rays of the sacral scope, pelvic femoral angle and cup ante-inclination in both sitting and standing positions<br>|
| Males<br>15 Males | Diagnostic Test: X-rays- total of 4<br>* X-rays of the sacral scope, pelvic femoral angle and cup ante-inclination in both sitting and standing positions<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Intraclass correlation coefficient (ICC) for Consistency in Spinopelvic Radiographic Measurements. | The intraclass correlation coefficient (ICC) will be used to evaluate the consistency of the 4 providers in measuring the sacral slope, pelvic femoral angle and cup ante-inclination via radiographs in both sitting and standing positions. | One year |