The Dynamic Gait Index (DGI) calculator is a tool used by healthcare professionals to assess a person’s ability to modify their gait in response to changing task demands.
Remember, the DGI consists of 8 tasks, each scored from 0 to 3, with a maximum total score of 24.
DGI Calculator
| Patient | Task 1 | Task 2 | Task 3 | Task 4 | Task 5 | Task 6 | Task 7 | Task 8 | Total Score | Interpretation |
|---|---|---|---|---|---|---|---|---|---|---|
| A | 3 | 3 | 2 | 3 | 3 | 3 | 2 | 3 | 22 | Normal |
| B | 2 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 13 | Fall risk |
| C | 3 | 3 | 3 | 2 | 3 | 2 | 3 | 3 | 22 | Normal |
| D | 1 | 2 | 1 | 1 | 0 | 1 | 1 | 1 | 8 | Severe impairment |
| E | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 17 | Moderate impairment |
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What is the Dynamic Gait Index?
The Dynamic Gait Index (DGI) is a clinical tool used to assess a person’s ability to modify their gait in response to changing task demands. It is particularly useful for:
- Evaluating balance
- Assessing fall risk
- Measuring functional mobility
The DGI is commonly used for older adults and individuals with neurological conditions. It consists of 8 walking tasks that challenge the subject’s stability and adaptability.
Dynamic Gait Index Scoring Table
| Score | Performance Level | Description |
|---|---|---|
| 3 | Normal | Completes task with no difficulty |
| 2 | Mild Impairment | Completes task with minor difficulty or adaptations |
| 1 | Moderate Impairment | Completes task with significant difficulty or requires assistance |
| 0 | Severe Impairment | Unable to complete task or requires significant assistance |
Dynamic Gait Index Calculation Formula
The DGI is scored based on the subject’s performance across eight tasks. Each task is rated on a four-point ordinal scale from 0 to 3, where:
- 0 = severe impairment
- 1 = moderate impairment
- 2 = mild impairment
- 3 = normal performance
The formula for calculating the total DGI score is:
DGI Score = Sum of individual task scores
With eight tasks, the maximum possible score is 24 (8 tasks × 3 points each).
What is a Normal Dynamic Gait Index Score?
A normal DGI score is generally considered to be 22 or higher out of the maximum 24 points. Scores below this threshold may indicate an increased risk of falls or balance impairment. However, it’s important to note that the interpretation of scores can vary depending on the specific population being assessed:
- Scores of 19 or less in community-dwelling older adults suggest an increased risk of falls
- For individuals with vestibular disorders, scores of 16 or less indicate a higher likelihood of falls
- In patients with Parkinson’s disease, a cutoff score of 20 has been suggested to identify those at risk of falling
Can You Do DGI with an Assistive Device?
Yes, the Dynamic Gait Index can be performed with an assistive device if the individual typically uses one for mobility. However, it’s crucial to note that the use of an assistive device may affect the scoring and interpretation of results. When administering the DGI with an assistive device:
- The type of device should be documented
- Consistency in device use across all tasks is important
- Clinicians should consider how the device impacts the individual’s performance on each task
What is the Difference Between Functional Gait Assessment and Dynamic Gait Index?
The Functional Gait Assessment (FGA) is an enhanced version of the Dynamic Gait Index. Key differences include:
- Number of tasks: The FGA consists of 10 tasks, while the DGI has 8.
- Scoring system: Both use a 4-point scale, but the FGA has more specific scoring criteria.
- Sensitivity: The FGA is generally considered more sensitive to subtle changes in gait and balance.
- Ceiling effect: The FGA addresses the ceiling effect sometimes observed in the DGI for higher-functioning individuals.
- Task difficulty: The FGA includes more challenging tasks, such as gait with eyes closed and backwards walking.
What is the Distance for the Dynamic Gait Index?
The standard distance used for most tasks in the Dynamic Gait Index is 20 feet (approximately 6 meters). This distance is used for tasks such as:
- Gait on level surface
- Change in gait speed
- Gait with horizontal head turns
- Gait with vertical head turns
- Stepping over obstacles
