Indonesian Version of Swedish Occupational Fatigue Inventory (SOFI): Validity and Reliability Test of Worker’s Fatigue Assessment Instrument

Background: The Swedish Occupational Fatigue Inventory (SOFI) is an instrument to assess a person’s fatigue, which not limited workers of company, but can also be used for the general public. SOFI determine fatigue from physical, cognitive and psychosocial conditions.1 This study aims translate so that it in Indonesia, then its validity reliability.Methods: was conducted using 10-step transcultural adaptation method ISPOR followed by item reliability tests on 224 at geothermal company Indonesia. Item-total correlation Confirmatory Factor Analysis performed online version 0.14.3 JASP statistic program. And test SPSS tool.Results: has been adapted into Indonesian through method. All items amounted 20 proved this questionnaire very good (α-Cronbach 0.969) showed: model (224, p < 0,001) = 337.649, CFI 0,958, NFI 0,924, RFI 0,909, IFI TLI 0,950, dan RMSEA 0,070, 90% CI: 0,060 – 0,081. Fit indices results had acceptable fits corresponding structure original instrument. Item-rest range 0.321 0.847, these reveal each item-rest extremely strong.Conclusion: proven have as assessing fatigue/work