P699 The concordance of Short Form-36 Health Survey scores with Mayo scores in the tofacitinib ulcerative colitis clinical programme. (15th January 2020) - Dubinsky, M C
Abstract: Background: The Short Form-36 Health Survey version 2 (SF-36v2) is a generic health-related quality-of-life (HRQoL) instrument [1]. Tofacitinib is an oral, small molecule JAK inhibitor for the treatment of ulcerative colitis (UC). In these exploratory analyses the concordance between total and partial Mayo scores and SF-36v2 scores was evaluated in patients with UC in the Phase 3 tofacitinib 8-week OCTAVE Induction 1&2 (NCT01465763; NCT01458951) and 52-week OCTAVE Sustain (NCT01458574) studies. Methods: A repeated measures regression model was used to evaluate the relationship between total and partial Mayo scores (as predictor) and SF-36v2 component and domain scores. A sensitivity analysis to assess the linearity assumption was performed using Mayo score as a categorical anchor (represented by integer values 0–12 [total] or 0–9 [partial]). Previous analyses identified clinically important differences (CIDs) in total and partial Mayo scores as changes of 3 points and 2.25 points, respectively [2]. Mean differences in SF-36v2 component and domain scores were compared with their recommended group-level CID thresholds [3]. Results: Clinically meaningful differences of 3 points and 2.25 points in total and partial Mayo scores, respectively, were generally associated with clinically meaningful differences in SF-36v2 component and domain scores, with the exception of Role-Emotional with partial Mayo score in the pooled induction studies and with total Mayo score in the maintenance study. In the induction studies, a 3-point difference in total Mayo score was associated with a mean difference exceeding CIDs in both the SF-36v2 Physical Component Summary score (mean improvement 4.5; 95% confidence interval [CI] 4.2, 4.7) and Mental Component Summary score (mean improvement 5.0; 95% CI 4.6, 5.3). Results were closely aligned when Mayo score was used as a categorical or continuous anchor, supporting a linear relationship between Mayo score and SF-36v2 scores (Figure). Similar results were observed in the maintenance study, and when assessing the relationship of partial Mayo score with SF-36v2 scores. Conclusion: Clinically meaningful decreases in disease activity, as measured by Mayo score, were associated with clinically meaningful benefits in HRQoL, as measured by SF-36v2 component and domain scores. These findings highlight the impact that disease activity has on HRQoL and may assist with articulating the treatment effect of tofacitinib on specific domains. References: Ware JE et al. SF-36 ® Health Survey Manual and Interpretation Guide. Boston: New England Medical Center, The Health Institute, 1993 Lewis JD et al. Inflamm Bowel Dis 2008;14:1660–6 Ware JE et al. User's Manual for the Sf-36v2 Health Survey. Lincoln: Quality Metric Incorporated, 2007