Welcome to the Gait & Brain Lab dual-task gait based MCI to dementia progression risk calculator app. You will automatically advance to the home page in a few seconds. If you want to skip directly to the home page, click on the 'Home' button at the top left corner.

This is the home page of the app. You can click on the 'Home' button at the top left corner of the screen at any time to jump back here. The home page has three buttons:

Assessment Mode: This mode walks you through the various dual-task gait assessment steps, including providing a timer to measure gait velocity. The data collected during the assessment process is then used to make the MCI to dementia progression risk prediction.

Calculator Mode: This mode allows you to directly enter previously collected dual-task gait assessment data and immediately provides the MCI to dementia progression risk prediction based on the data.

About: This button takes you to the 'About' page that provides background information about this app.

This page provides background information about this app, including its utility, authors and data reference. Click on the 'Home' button at the top left corner to return to the home page.

This page allows you to enter the demographic and baseline data for the gait assessment. You must select at least one dual-task option in order to proceed with the assessment.

Click on the 'Back' arrow button to return to the home page. Click on the 'Reset' button to clear all entered data on this page, as well as the recorded data on the subsequent pages. Click on the 'Next' arrow button to proceed to the usual gait measurement page.

This page allows you to record the gait performance in real time. The usual gait measurement page only has a timer to record the velocity, whereas the dual-task gait measurement pages also have the ability to track the number of correct and incorrect subtractions or animal names.

Ideal gait testing distance is 8 to 10 meters in an area with minimal distractions. For usual gait measurement, ask the patient to walk casually at their usual walking speed. For the dual-task gait measurement, ask the patient to perform the respective cognitive task while walking casually and emphasize that they should try their best to actually perform the task while continuing to walk without stopping.

Click on the green 'Start' button to start the timer when the patient starts walking, and the red 'Stop' button to stop the timer when the patient crosses the finish line. The timer field value can also be manually edited if desired.

For the counting backwards gait, ask the patient to count backwards by 1 out loud starting at a multiple of 10 (i.e. 50, 80, 100), and record number of correct subtractions while walking. Similarly, for the serial sevens gait, ask the patient to count backwards in steps of 7. For the naming animals gait, ask the patient to name animals (such as dog, cat, horse) out loud, and record the number of unique animals correctly named while walking.

On the dual-task gait pages, click on the green 'Correct' button to increment the correct attempt counter or the red 'Incorrect' button to increment the incorrect attempt counter. The correct and incorrect attempt counters can also be manually edited if desired.

Click on the 'Back' arrow button to return to the previous page. Click on the 'Reset' button to clear all entered data on this page. The data on the other assessment pages will be preserved. Click on the 'Next' arrow button to proceed to the next assessment page or the result page.

This page presents a summary of the data collected during the gait assessment and the MCI to dementia progression risk prediction based on the data.

Four sets of probabilities are calculated based on: (1a) the unadjusted dual-task costs (DTC), (1b) the adjusted dual-task costs (ADTC; adjusted with respect to the dual-task scores, a measure of the cognitive effort during dual-tasking), (2a) the patient's age and DTC categories, and (2b) bilinear interpolation of age and DTC to better estimate the risk for the patient's exact age and DTC.

Click on the 'Go Back' button to return to the previous page, or the 'Home' button at the top left corner to return to the home page.

This page allows you to directly enter previously collected gait assessment data to obtain the MCI to dementia progression risk prediction based on the data.

You must select at least one dual-task option in order to make a prediction. If the number of attempts and errors are not available, please enter 0 for both to ignore the parameters.

Click on 'Calculate' button to compute and display the data summary and prediction. If any field is not appropriately filled, a relevant error message will pop up at the field. Click on 'Reset' button to clear all entered data.

This page presents a summary of the data entered on the previous page and the MCI to dementia progression risk prediction based on the given data.

Four sets of probabilities are calculated based on: (1a) the unadjusted dual-task costs (DTC), (1b) the adjusted dual-task costs (ADTC; adjusted with respect to the dual-task scores, a measure of the cognitive effort during dual-tasking), (2a) the patient's age and DTC categories, and (2b) bilinear interpolation of age and DTC to better estimate the risk for the patient's exact age and DTC.

Click on the 'Go Back' button to return to the data entry page, or the 'Home' button at the top left corner to return to the home page.