Motor and gait is a composite measure of global motor function calculated using the following items:

1. Purdue Pegboard Test (no. of pegs)
2. Finger-tapping test (taps/10 seconds)
3. Time to cover a distance of 8 feet (1/seconds)
4. Number of steps required to cover 8 feet (1/no. of steps)
5. 360 degree turn time (1/seconds)
6. Number of steps to complete a 360 degree turn (1/no. of steps)
7. Leg stand (seconds)
8. Toe stand (seconds)
9. Grip strength (pounds)
10. Pinch strength (pounds)

Each motor performance is scaled by dividing by the sex-specific mean from all participants at baseline and then averaging all the scaled motor tests together.

The individual components of this variable are available upon request.