Evaluation of Real-world treatment patterns in Japanese patients with cGVHD: A retrospective claims database study.

This retrospective cohort study using the medical data vision (MDV) database included adult patients who had confirmed diagnosis of cGVHD between 2003 and 2023, were prescribed a steroid prior to diagnosis of cGVHD, and received mycophenolate mofetil (MMF), ibrutinib, or ruxolitinib as second- or later-line therapy. Duration of treatment (DoT) and steroid dose reduction during second-line therapy were assessed. Of the 1489 patients whose data were retrieved, 854 were included (median [range] age: 54 [18.0-83.0] years; males: 518 [60.7%]; mean [SD] Charlson Comorbidity Index score: 7.5 [3.5]). Data on second or later lines of treatment were available for 226 patients. The most common second-line therapy used after first-line steroid treatment was MMF (110 [48.67%]), followed by ibrutinib (88 [38.94%]) and ruxolitinib (28 [12.39%]). Median DoT (days) was 95 for MMF, 86 for ibrutinib, and 30 for ruxolitinib. Steroid doses were mostly kept below 0.5 mg/kg/day under all the 3 second-line treatments. These real-world data provide valuable insights into the management of cGVHD with the therapies currently used in Japan.