Time to discontinuation of TKI, and reasons for TKI treatment discontinuation to be provided

PRO-CTCAE provides assessment on individual symptom/side effect related to gastrointestinal signs/symptoms (diarrhea, constipation, nausea, vomiting), cardiovascular, sleep/wake, fatigue, headache, rash, muscle spasms, myalgia, joint pain, shortness of breath/coughing/chest pain, and edema. PRO-CTC AE scores range from 0 to 4 (4 stands for very severe)

Functional assessment of chronic illness therapy - GP5 (FACIT-GP5): A single item question from the Functional Assessment of Cancer Therapy - General (FACT-G) that asks patients to rate the side effect bother on a 5 point Likert scale from "not at all" to "very much"

The Global Health Patient-Reported Outcomes Measurement Information System (PROMIS-10) scale is a ten-item patient-reported measure that evaluates physical, mental, and social health. From the responses to the questions, two summary scores are derived: a global physical health score and a global mental health score. These scores are then normalised to the general population using the "T-score". The T scores range from 0 to 100 points, with 0 points indicating the most severe physical and/or mental impairment and 100 points representing the best possible health status.

Medication Adherence Report Scale - 10 (MARS-10): consists of 10 questions on forgetting, changing dosage, stopping, skipping, and taking less medication. Score ranges from 0 to 10, the higher the response the better the adherence to the medication.

Rates of molecular responses at/by specified timepoints. MR1 is defined as Breakpoint cluster region (BCR)::Abelson (ABL1) ratio ≤ 10%; MR2 as BCR::ABL1 ratio ≤ 1%; MMR as BCR::ABL1 ratio ≤ 0.1%; MR4 as BCR::ABL1 ratio ≤ 0.01%; and MR4.5 as BCR::ABL1 ratio ≤ 0.0032%.

Duration of a specified molecular endpoint is defined as the time between the date of the first documented achievement of the specified molecular endpoint (on/after the first day of current TKI treatment) and the earliest date of loss of the specified molecular endpoint, treatment failure, progression to accelerated phase/blast crisis (AP/BC), or CML-related death for the patients in the analysis set who achieved molecular response at any time respectively. The duration will be censored at the last molecular assessment date while on treatment for patients who have not experienced any of the above events.

CHR at specified timepoints are defined as the proportion of patients who achieve response at specified timepoints. For "by" timepoints, if a patient achieves a CHR and then loses it at or before the specified timepoint, he/she will still be classified as achieving CHR by that specific timepoint.

FFS is defined as the time from the date of treatment start to the earliest occurrence of the following events:

• Treatment failure as defined below based on investigator or designee assessment irrespective of entry into the TFR period
• Confirmed loss of MMR (in 2 consecutive tests, at any time while on treatment
• Progression to BC as defined by the WHO (Khoury et al 2022)
• Death from any cause (including deaths observed during the survival follow-up period) For patients who have not experienced an event prior to or at the analysis cut-off date, the time will be censored at the date of last treatment or last assessment (whichever is later) or last post treatment follow-up.

PFS is defined as the time from the date of treatment start to the earliest occurrence of the following events:

• progression to blastic phase
• death from any cause

Overall survival (OS) is defined as the time from the date of treatment start to the date of death from any cause or end of follow-up period.