569 - Impact of therapeutic inertia on patient-reported outcomes in moderate-to-severe atopic dermatitis: a 12-month longitudinal study from the TARGET-DERM AD registry

Abstract Background Therapeutic inertia, defined as the delay or reluctance in modifying treatment when goals are unmet, is a significant challenge in managing chronic diseases, including atopic dermatitis (AD). This inertia can lead to suboptimal control of the disease, affecting patient outcomes. Objectives This study aims to evaluate the effect of therapeutic inertia on patient-reported outcomes (PROs) in individuals with moderate-to-severe AD undergoing systemic treatment over 3 to 12 months. Methods We analyzed longitudinal data from the TARGET-DERM AD registry, which includes 3,457 patients with moderate-to-severe AD from 39 centers across the U.S. and Canada. Eligible patients had documented outcomes at the initiation of systemic therapy and at subsequent 3-month intervals up to 12 months of follow-up. We assessed patient-reported outcomes (PROs) to determine the proportion of patients not meeting predefined treatment targets for PROs based on expert consensus. Patients had a validated Investigator Global Assessment (vIGA-AD) score of 3 or more at initiation of either an advanced systemic therapy (AST) such as biologics or JAK inhibitors or a conventional systemic therapy (CST) such as cyclosporine, methotrexate, or prednisone. PROs were evaluated at 3-month intervals up to 12 months, assessing achievement against predefined treatment targets based on expert consensus. PRO measures included Worst-Itch (PROMIS Itch-Severity), POEM, PO-SCORAD, NRS-sleep, and NRS-pain with specific moderate and optimal target levels established for each. Itch-Severity (range: 0–10; moderate target: ≥4-point reduction, optimal target: score ≤1), POEM (range: 0-28; moderate target: ≥4-point reduction, optimal target: score ≤2), PO-SCORAD (range: 0-103; moderate target: score ≤24; optimal target: score ≤10), NRS-sleep and NRS-pain (range: 0-10; moderate target: reduction ≥3-points; optimal target: score ≤1). Results Out of 2107 patients with moderate-to-severe AD, 445 qualifying participants were included (63.8% adult, 62.0% female, 45.4% Non-Hispanic White, mean age of 31 years). Most patients (88.8%) initiated AST, with dupilumab being the most common (86.5%). At 6 months, significant proportions of AST-treated patients failed to reach moderate and optimal targets for itch (67% and 79%, respectively), POEM (46% and 69%), and NRS-sleep (59% and 47%). By 12 months, these figures were similar, with 66% and 88% failing to meet itch targets, 53% and 73% failing to meet POEM targets, and 62% and 45% failing to meet NRS-sleep targets, respectively. A similar pattern was observed for other PROs. CST-treated patients exhibited similar trends. Conclusions The study highlights the profound impact of therapeutic inertia on the quality of life of patients with moderate-to-severe AD. Despite systemic therapy, a considerable proportion failed to meet treatment targets over a 12-month period, underscoring the need for more proactive and responsive treatment strategies in AD management.