Dynamic Gait Index
There is more information about the evaluation and the result interpretation in the text below the calculator.
The dynamic gait index is addressed to patients who are at risk of fall because of different causes, including old age, Parkinson’s disease, multiple sclerosis.
This is a simple evaluation of balance and ability to perform several activities and can help monitor the status of patients with vestibular conditions.
The patient’s ability to maintain their balance and perform the standard activities is rated on a 4 point scale from no gain impairment to severe impairment.
Therefore, the final result varies from 0 to 24 points, where the higher the score, the closer to normal the gait function is.
There is a cut off set at 19 points (67% sensitivity and 86% specificity) which means that scores below 19 indicate a high risk of prospective falls and those patients should be offered appropriate assistance.
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The assessment method explained
This tool is an evaluation of gait and balance, based on eight functional walking tests, that is aimed at predicting risk of falls. The GTI was validated and is recommended for use in the following populations:
■ Vestibular disorders;
■ Geriatric patients;
■ Parkinson’s disease;
■ Multiple sclerosis.
The index can be administered in about 15 minutes and needs to take place in a space where stairs are easily available, as well as a 20’ walkaway that is 15” wide. Also, a box (shoebox) and 2 cones are used.
The eight activities and their instructions are introduced below:
1. Gait level surface: Walk at your normal speed from here to the next mark (20’).
2. Change in gait speed: Begin walking at your normal pace (for 5’), when I tell you “go”, walk as fast as you can (for 5’). When I tell you “slow”, walk as slowly as you can (for 5’).
3. Gait with horizontal head turns: Begin walking at your normal pace. When I tell you to “look right”, keep walking straight, but turn your head to the right. Keep looking to the right until I tell you “look left”, then keep walking straight and turn your head to the left. Keep your head to the left until I tell you, “look straight”, then keep walking straight, but return your head to the centre.
4. Gait with vertical head turns: Begin walking at your normal pace. When I tell you to “look up”, keep walking straight, but tip your head and look up. Keep looking up until I tell you, “look down”. Then keep walking straight and turn your head down. Keep looking down until I tell you, “look straight”, then keep walking straight, but return your head to the centre.
5. Gait and pivot turn: Begin walking at your normal pace. When I tell you, “turn and stop”, turn as quickly as you can to face the opposite direction and stop.
6. Step over obstacle: Begin walking at your normal speed. When you come to the shoebox, step over it, not around it, and keep walking.
7. Step around obstacles: Begin walking at normal speed. When you come to the first cone (about 6’ away), walk around the right side of it. When you come to the second cone (6’ past first cone), walk around it to the left.
8. Steps: Walk up these stairs as you would at home i.e. using a rail if necessary. At the top, turn around and walk down.
These activities are designed to check the subject’s ability to shift balance as to accommodate a wide range of movements, concomitant to walking and without falling.
Each of the eight activities is followed by a specific description of 4 functional statuses, for example the “Change in gait speed” is described as:
■ Normal: Able to smoothly change walking speed without loss of balance or gait deviation. Shows significant difference in walking speeds between normal, fast and slow paces. (3)
■ Mild impairment: Is able to change speed but demonstrates mild gait deviations, or no gait deviations but unable to achieve a significant change in velocity, or uses an assistive device. (2)
■ Moderate impairment: Makes only minor adjustments to walking speed, or accomplishes a change in speed with significant gait deviations, or changes speed but loses balance but is able to recover and continue walking. (1)
■ Severe impairment: Cannot change speeds, or loss balance and has to reach for a wall or be caught. (0)
After the index was published, several studies have validated its use in the assessment and monitoring of patients at risk of falls.
As introduced above, each of the eight activities benefits from a customized 4 point scale which can be summarized as follows:
■ No gait dysfunction (3 points);
■ Minimal impairment (2 points);
■ Moderate impairment (1 point);
■ Severe impairment (0 points).
The highest possible score obtainable in the DGI is 24 and the lowest is 0. Scores closer to 24 indicate an almost or completely normal condition. Scores closer to 0 indicate a severe gait impairment.
A cut off of 19 points (with 67% sensitivity and 86% specificity) delimits patients at risk of falls (scoring below 19) and those who are unlikely to suffer from prospective falls.
When used in the evaluation of multiple sclerosis patients, a cut off of 12 points is recommended as opposed to that of 19, because of better discrimination between patients who are at risk of falls and those who have good balance.
This index may also be used in the evaluation of recovery of ambulatory patients who have suffered a stroke episode.
1. Herdman SJ. Vestibular Rehabilitation. 2nd ed. Philadelphia, PA: F.A.Davis Co; 2000.
2. Shumway-Cook A, Woollacott M. Motor Control Theory and Applications, Williams and Wilkins Baltimore, 1995: 323-324.
Jonsdottir J, Cattaneo D. Reliability and validity of the dynamic gait index in persons with chronic stroke. Arch Phys Med Rehabil. 2007; 88(11):1410-5.
1. Wrisley DM, Walker ML, Echternach JL, Strasnick B. Reliability of the dynamic gait index in people with vestibular disorders. Arch Phys Med Rehabil. 2003; 84(10):1528-33.
2. Herman T, Inbar-Borovsky N, Brozgol M, Giladi N, Hausdorff JM. The Dynamic Gait Index in healthy older adults: the role of stair climbing, fear of falling and gender. Gait Posture. 2009; 29(2):237-41.
3. Whitney SL, Hudak MT, Marchetti GF. The dynamic gait index relates to self-reported fall history in individuals with vestibular dysfunction. J Vestib Res. 2000; 10(2):99-105.
App Version: 1.0.1
Coded By: MDApp
Objective: Risk Prediction
No. Of Items: 8
Year Of Study: 2000
Published On: June 18, 2017 · 10:54 AM
Last Checked: June 18, 2017
Next Review: June 18, 2018