Reliability and Validity of Modified Four Square Step Test

Functional improvements are reached in patients with primary total hip arthroplasty compared to the pre-operative term however some problems as continued range of motion limitations, loss of joint proprioception sensation, and resulting balance and gait disorders may result in failure of the Four Square Step Test. Therefore, the need for the apply of the Modified Four Square Step Test in individuals with primary THA is necessary. The aim of this study is to evaluate the test-retest reliability, concurrent validity and minimal detectable change of the Modified Four Square Step Test in individuals with primary total hip arthroplasty.