The amputee mobility predictor: an instrument to assess determinants of the lower-limb amputee's ability to ambulate.

Objectives: To describe the development of the Amputee Mobility Predictor (AMP) instrument designed to measure ambulatory potential of lower-limb amputees with (AMPPRO) and without (AMPnoPRO) the use of a prosthesis, and to test its reliability and validity.

Design: Measurement study using known groups method and concurrence with existing measures.

Setting: Academic medical center.