<h1>Gait in Aging and Disease Database</h1>

<p><strong>Jeffrey Hausdorff</strong>, <strong>Patrick Purdon</strong>, <strong>Chung-Kang Peng</strong></p>

<p><strong>Published:</strong> Oct. 13, 2000. Version: 1.0.0</p>

<h2>Citation</h2>

<p>

Please include the standard citation for PhysioNet:

<br>

Goldberger, A., Amaral, L., Glass, L., Hausdorff, J., Ivanov, P. C., Mark, R., ... & Stanley, H. E. (2000).

PhysioBank, PhysioToolkit, and PhysioNet: Components of a new research resource for complex physiologic signals.

<em>Circulation</em> [Online]. 101 (23), pp. e215–e220.

</p>

<h2>Data Description</h2>

<p>

Walking stride interval time series are included for 15 subjects:

<ul>

  <li>5 healthy young adults (ages 23–29)</li>

  <li>5 healthy old adults (ages 71–77)</li>

  <li>5 older adults with Parkinson's disease (ages 60–77)</li>

</ul>

</p>

<p>

The file names indicate subject group: <strong>o</strong> for old, <strong>y</strong> for young, and <strong>pd</strong> for Parkinson’s disease.

For young and old, the filename also includes the age in years.

</p>

<p>

Subjects walked continuously on level ground along an obstacle-free path.

Stride intervals were measured using ultra-thin, force-sensitive resistors placed inside the shoe.

The analog signal was sampled at 300 Hz using a 12-bit A/D converter with an ankle-worn microcomputer.

Time between foot strikes was then automatically calculated using a validated method consistent with force-platform measurements.

</p>

<p>

Data collection:

<ul>

  <li>Healthy subjects walked for 15 minutes in a circular path</li>

  <li>Parkinson’s subjects walked for 6 minutes in a hallway</li>

</ul>

</p>

<h2>Files</h2>

<p>

You may download:

<ul>

  <li><code>gait-data.tar</code> (150K) - full dataset as a UNIX tar archive</li>

  <li><code>gait-data.tar.gz</code> (47K) - compressed version</li>

</ul>

</p>

<p>

Each file includes two columns:

<ul>

  <li><strong>Column 1:</strong> Time (seconds)</li>

  <li><strong>Column 2:</strong> Stride interval (seconds)</li>

</ul>

</p>

<p>

Data is also available in PhysioBank format with annotation (<code>.str</code>) and header (<code>.hea</code>) files,

for viewing or analysis using PhysioToolkit.

</p>

<h2>References</h2>

<ul>

  <li>JM Hausdorff et al., <em>Fractal dynamics of human gait</em>, J Appl Physiol 80:1448–1457, 1996.</li>

  <li>JM Hausdorff et al., <em>Altered fractal dynamics of gait</em>, J Appl Physiol 82:262–269, 1997.</li>

  <li>JM Hausdorff et al., <em>Gait variability and basal ganglia disorders</em>, Mov Disord 13:428–437, 1998.</li>

</ul>

<h2>More Information</h2>

<p>

A mini-tutorial and database introduction is available on the Reylab website.

For more details, please contact JM Hausdorff.

</p>