The Fatigue severity scale translated into Slovenian language (LSU) is a reliable and sensitive tool for determining chronic fatigue in stroke. A cut-off value > ali ≥ 4 was used to determine chronic fatigue. The prevalence of fatigue in subjects in the chronic phase after stroke was 73 %. People with orthopedic diseases have a lower prevalence (57 %) of fatigue than the people in the chronic phase after a stroke. In the first measurement of LSU, more than 50 % of all people with orthopedic diseases responded to six claims with a score of 4 or higher, and in second measurement to 8 claims. At the 3rd and 8th claim people with orthopedic diseases rarely responded above the limit (46 %). With a score of 4 or higher, more than 70 % of all people in the cronic phase after a stroke answered all 9 LSU test claims. At the 1st statement, both groups had the highest percentage of responses above the threshold, both in the first measurement and in the second. In the first measurement they answered the last, ninth claim with the lowest percentage above > ali ≥ 4 (40,1 % in pearsons with orthopedic diseases and 73,2% in pearsons in the chronic phase after stroke). In the second measurement, the group with orthopedic diseases had the lowest % of responses above the threshold in 3rd claim. The group in the chronic phase after stroke responded to claims 3 and 6 in the second measurement of LSU with the lowest % above the threshold (73,2 %).
LSU had a good internal reliability in individuals with orthopedic disease and excellent in individuals in the chronic phase after stroke, as Cronbach α was 0,897 and 0,997, respectively. The ICC was 0,955 (individual measurements) and 0,977 (average of measurements) for pearsons after stroke and 0,813 (individual measurements) and 0,897 (average of measurements) for persons with orthopedic diseases.
The Visual analog scale (VAL) is not sensible to distinguish fatigue between pearsons with orthopedic diseases and pearsons in the chronic phase after stroke. LSU is slightly more sensible, but is still not able to distinguish fatigue between groups. Claim 3, 8 and 9 most distinguish between fatigue in people with orthopedic disease and people in the chronic phase after a stroke.
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