Test-retest reliability
bleeding, ulcer, ’
BLEEDING, ULCER
Test-retest reliability was used to evaluate the stability of the PIB score and the Decision Tree score in relation to the PGIS, PGIC, CGIS, and CGIC anchor. Moreover, the stability of the weeping, bleeding, and ulcer items were evaluated using the same four anchors. The test-retest reliability measured the degree to which the given score was similar at different points in time in a subset of ‘stable’ patients. A stable subject was defined as a subject with no change in PGIS and CGIS scores from Visit 1 to Visit 2 and similarly no change for the PGIC and CGIC scores from Visit 1 to Visit 2.The test-retest reliability was determined by calculating the intraclass correlation coefficient (ICC). Specifically, an ICC based on a single measurement, absolute agreement, two-way mixed effects model was used which has been specifically recommended for use in test-retest reliability analyses (