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Related Experiment Video

Updated: Jul 2, 2026

Impact Mitigation in Modern Football Helmets: Advances and Limitations of Position-Specific Designs

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The Hip Impact Protection Project: design and methods.

Bruce A Barton¹, Stanley J Birge, Jay Magaziner

¹Maryland Medical Research Institute, Baltimore, MD, USA. bbarton@mmri.org

Clinical Trials (London, England)

|August 14, 2008

Summary

This summary is machine-generated.

Hip protectors can reduce hip fractures in nursing home residents. The Hip Impact Protection Project (HIP PRO) used a novel design where each resident acted as their own control, improving adherence and efficacy assessment.

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Imaging of the Microstructural Failure Mechanism in the Human Hip

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Last Updated: Jul 2, 2026

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Imaging of the Microstructural Failure Mechanism in the Human Hip

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Published on: September 29, 2023

Area of Science:

Gerontology
Biomechanics
Public Health

Background:

Hip fractures are a significant health issue in the elderly, with U.S. cases projected to double in 40 years.
Nearly 340,000 hip fractures occur annually in the U.S., posing a substantial burden on healthcare.

Purpose of the Study:

To investigate the efficacy and safety of hip protectors in a nursing home population.
To describe an innovative clustered matched-pair research design for the Hip Impact Protection Project (HIP PRO).

Main Methods:

37 nursing homes were recruited across three clinical centers and randomized for hip protector use on either the right or left hip.
A clustered matched-pair design was employed, with each resident serving as their own control to minimize confounding variables.
The study targeted 580 residents, with provisions for replacement due to dropouts, fractures, or death.

Main Results:

The clustered matched-pair design successfully mitigated issues of unbalanced risk factors seen in previous cluster-randomized trials.
Each resident acting as their own control effectively eliminated imbalances in risk factors influencing treatment effects.
Frequent adherence assessments provided insights into demographic and environmental factors affecting hip protector use.

Conclusions:

The study design enhanced adherence compared to previous research through a run-in period, staff incentives, and frequent assessments.
While generalizability may be limited due to pad design evolution and potential behavioral changes, adherence factors are valuable for future studies.
The research design provided a robust method for assessing hip protector efficacy in a vulnerable elderly population.