Reliability of Functional Measures in Hemodialysis Patient.

Study Overview
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Brief Summary
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The investigators pretend to calculate values absolute and relative reliability that have not been yet reported (Short Physical Performance Battery, one-leg balance and Timed Up and go).

Detailed Description
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Patients suffering from End Stage Renal Disease are commonly involved in haemodialysis treatment, which is the most common treatment at this stage. Haemodialysis substitutes the renal function but is associated with several alterations that lead to decrease in functional capacity and health related quality of life (HRQoL). Many studies show that functional capacity, physical activity level and HRQoL is significantly worse than their healthy sedentary age - matched counterparts. It is unknown if low physical activity, uraemia or anaemia are responsible for the decreased functional capacity of this cohort. Physical performance tests are frequently used to assess haemodialysis patients since is a feasible and low-cost evaluation. The purpose of the present study is quantified how the functional capacity changes over a -6 months period in a group of haemodialysis patients. Additionally the investigators pretend to calculate values absolute and relative reliability that have not been yet reported (Short Physical Performance Battery, one-leg balance and Timed Up and go).

Official Title
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Test-retest Reliability and Minimal Detectable Change Scores for the Short Physical Performance Battery (SPPB), One Leg Balance and Timed up and go.

Conditions
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End Stage Renal Disease

Intervention / Treatment
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* Other: functional tests


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: people under hemodialysis treatment at least 3 months be medicable stable complete all the physical tests Exclusion Criteria: heart stroke in the previous 6 weeks of the study inferior limb amputation without artificial aids cerebral vascular disease (ictus, ischemic) disability to complete functional tests

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 90 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Other: functional tests|Test-retest reliability of physical function in hemodialysis patients|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Short Physical Performance Battery | Assess lower extremity, which includes objective performance-based measure of balance (side-by-side, semitanden and tandem), endurance (4m gait speed) and strength (five chair stands). Each component was scored from 0 to 4 and when summed yielded SPPB scores between 0 (poor) and 12 (best). | It will perform the test twice with one to two weeks interval between the testing session | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| One Leg Standing Test | Consist in maintain one leg stance for as long as possible. The test was considered normal if the one leg standing time reached 45 seconds. | It will perform the test twice with one to two weeks interval between the testing session | 
| Timed Up and Go | To stand up from a standard arms chair, walk 3 meters, turn back the cone walk back and sit down to the chair. The time in seconds is record. | It will perform the test twice with one to two weeks interval between the testing session |