Validity and Reliability Test on Sleep Quality Scale (SQS) Instruments in Indonesia Version on Cancer Patients

Many cancer patients experience sleep disturbances or have poor sleep quality. The measurement of sleep quality in cancer patients has not been carried out in hospitals in Indonesia. The tools for measuring sleep are costly. Sleep quality measurement with sleep quality instruments has not been applied as a standard for patient assessment. To test the validity and reliability of the Indonesian version of the Sleep Quality Scale instrument to measure the quality of one's sleep and to test the internal consistency and retest reliability of the Indonesian version of the Sleep Quality Scale instrument to measure the quality of one's sleep. The instrument used was SQS with six components and 28 items.  This research is a quantitative approach with a cross-sectional design. This research is a study of the validity and reliability of the instrument. The content validity test was measured using Aiken's V formula. The construct validity was measured using the product-moment, and using factor analysis, the reliability of SQS was measured using the Cronbach Alphand the reliability of the retest was using the ICC test. The Sleep Quality Scale shows good validity, namely the content validity value of Aiken's value V0.976, the validity of the extract of all SQS items, is valid. Internal consistency reliability shows good results. Cronbach Alpha 0.849, the ICC value on the test-retest test is 0.903. The goodness of fit test shows unsatisfactory results with a p-value of chi-square 0.00, RSMEA = 0.067, GFI = 0.750 and CFI = 0.869. Clinicians can use the Indonesian version of the Sleep Quality Scale instrument as an instrument to measure sleep quality in cancer patients.