title: The amputee mobility predictor: an instrument to assess determinants of the lower-limb amputee's ability to ambulate.
abstract: 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.
  
  
  
  Measurement study using known groups method and concurrence with existing measures.
  
  
  
  Academic medical center.
  
  
  
  A convenience sample of 191 lower-limb amputee subjects who had completed prosthetic training, 24 in the reliability study (mean age +/- standard deviation, 68.3+/-17.9y, range, 28-99y) and 167 in the validity study (mean age, 54.8+/-18.6y; range, 18-100y).
  
  
  
  Not applicable.
  
  
  
  Intra- and interrater reliability; construct validity by known groups method; concurrent validity by comparisons with 6-minute walk test, Comorbidity Index, age, and time since amputation; predictive validity by comparison with 6-minute walk test after controlling for other factors.
  
  
  
  Interrater reliability was.99 for subjects tested with and without their prosthesis; intrarater reliability was.96 and.97. Both the AMPnoPRO (P<.0001) and the AMPPRO scores (P<.0001) distinguished among the 4 Medicare functional classification levels. The AMP correlated strongly with 6-minute walk scores (AMPnoPRO r=.69, P<.0001; AMPPRO r=.82, P<.0001) and the amputee activity survey (AMPnoPRO r=.67, P<.0001; AMPPRO r=.77, P<.0001), and negatively correlated with age (AMPnoPRO r=-.69, P<.0001; AMPPRO r=.56, P<.0001) and comorbidity (AMPnoPRO r=-.43, P<.0001; AMPPRO r=.38, P<.0001).
  
  
  
  The AMP with and without a prosthesis are reliable and valid measures for the assessment of functional ambulation in lower-limb amputee subjects.
authors: Division of Physical Therapy, Department of Orthopaedics & Rehabilitation, University of Miami School of Medicine, Miami, FL 33146, USA. rgailey@bellsouth.net
authors: Robert S
authors: RS
authors: Gailey
authors: Kathryn E
authors: KE
authors: Roach
authors: E Brooks
authors: EB
authors: Applegate
authors: Brandon
authors: B
authors: Cho
authors: Bridgid
authors: B
authors: Cunniffe
authors: Stephanie
authors: S
authors: Licht
authors: Melanie
authors: M
authors: Maguire
authors: Mark S
authors: MS
authors: Nash
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000674:Amputees / Q000534:rehabilitation*; D001186:Artificial Limbs; D005260:Female; D006801:Humans; D007866:Leg / Q000503:physiopathology*; D008124:Locomotion / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D011237:Predictive Value of Tests; D020127:Recovery of Function / Q000502:physiology; D015203:Reproducibility of Results