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Reliability of daily step activity monitoring in adults with incomplete spinal cord injury

Reliability of daily step activity monitoring in adults with incomplete spinal cord injury . Saori Ishikawa, MS, ATC, CSCS; Sandy L. Stevens, PhD; Minsoo Kang, PhD; Don W. Morgan, PhD . Study Aim

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Reliability of daily step activity monitoring in adults with incomplete spinal cord injury

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  1. Reliability of daily step activity monitoring in adults with incomplete spinal cord injury Saori Ishikawa, MS, ATC, CSCS; Sandy L. Stevens, PhD; Minsoo Kang, PhD; Don W. Morgan, PhD

  2. Study Aim • Determine the number of days of step activity monitoring required to establish stable measures of walking activity in adults with incomplete spinal cord injury (iSCI). • Relevance • Before quantifying changes in physical activity status due to therapeutic interventions in persons with iSCI, researchers must be able to accurately and reliably assess locomotor activity.

  3. Methods • 11 adults with iSCI wore a StepWatch Activity Monitor during waking hours for 7 consecutive days. • We used generalizability theory to identify sources of variance in daily step counts and determine the minimum number of days necessary to obtain a reliability coefficient ≥0.80.

  4. Results • Average daily step activity was 1,281 ± 1,594 steps. • Minimum of 2 days was required to achieve a reliability coefficient ≥0.80. Relationship between days of step activity monitoring and mean reliability coefficient (G-coefficient) values.

  5. Conclusions • An acceptably stable measure of walking activity in adults with iSCI can be obtained by averaging step count values from any 2-day period in a week. • These results should be useful in evaluating the effect of activity-based programs designed to enhance locomotor function in persons with iSCI.

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