Inclusion Criteria:  current users of lower limb prosthesis of minum 6 month, to be able to fully understand and appropriately complete the questionnaire, to be unilater amputee.  Exclusion Criteria:  inability to understand and complete the questionnair (e.g. cognitive or language impairment; not native-Arabic speaker), less the 6 month of using the prosthesis, bilateral and partial lower limb amputees