A comparison of two time intervals for test-retest reliability of health status instruments.

By R. Marx, Alia Menezes, Lois Horovitz, Edward C. Jones, R. Warren. Journal of Clinical Epidemiology, 2003

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A reliable and valid questionnaire was developed to measure computer vision syndrome at the workplace. (2015, background): “However, the lack of correlation between the difference between scores and the time between administrations suggests that under standard conditions with the time between test administrations of 2 days to 2 weeks, as recommended in the literature [55], the difference in the ratings obtained would hav”
EULAR Sjögren's syndrome disease activity index: development of a consensus systemic disease activity index for primary Sjögren's syndrome (2009, methodology): “Reliability of disease activity scoring The evaluation of clinical vignettes common to 2 raters was used to assess inter-rater reliability: - For the 0-10 PhGA: intraclass correlation coefficient (ICC) and Bland and Altman graphical analysis[ 23 , 24] - For the 5-point scale: global agreement and Ka”