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

This study aims to 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). The results show that a minimum of 2 days of monitoring is required to achieve a reliability coefficient of ≥0.80. These findings can be useful in evaluating the effect of activity-based programs designed to enhance locomotor function in persons with iSCI.

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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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