Ponatinib for Chronic Myeloid Leukemia (CML) Evaluation and Ph+ Acute Lymphoblastic Leukemia (ALL)

MCyR is defined as percentage of participants with complete cytogenetic response (CCyR) or partial cytogenetic response (PCyR). Cytogenetic response is the percentage of Philadelphia chromosome positive (Ph+) metaphases in bone marrow (BM). Response is further defined as MCyR: CCyR or PCyR, where CCyR: no Ph+ cells; PCyR: 1 to 35% Ph+ cells.

MaHR is defined as percentage of participants with complete hematologic response (CHR) or no evidence of leukemia (NEL). Response criteria for CHR is reported as white blood cells (WBC)≤institutional upper limit of normal, absolute neutrophil count (ANC)≥1000/mm^3, platelets≥100,000/mm^3, no blasts or promyelocytes in peripheral blood, BM blasts ≤5%, <5% myelocytes plus metamyelocytes in peripheral blood, basophils in peripheral blood <5%, no extramedullary involvement; Response criteria for NEL is reported as WBC≤institutional upper limit of normal, no blasts or promyelocytes in peripheral blood, BM blasts ≤5%, <5% myelocytes plus metamyelocytes in peripheral blood, basophils in peripheral blood <5%, no extramedullary involvement, at least 1 of the following: (i) 20,000/mm^3≤platelets<100,000/mm^3; (ii) 500/mm^3≤ANC<1000/mm^3.

MaHR is defined as percentage of participants with CHR or NEL. Response criteria for CHR is reported as WBC≤institutional upper limit of normal, ANC≥1000/mm^3, platelets ≥100,000/mm^3, no blasts or promyelocytes in peripheral blood, BM blasts ≤5%, <5% myelocytes plus metamyelocytes in peripheral blood, basophils in peripheral blood <5%, no extramedullary involvement; Response criteria for NEL is reported as WBC≤ institutional upper limit of normal, no blasts or promyelocytes in peripheral blood, BM blasts ≤5%, <5% myelocytes plus metamyelocytes in peripheral blood, basophils in peripheral blood <5%, no extramedullary involvement, at least 1 of the following: (i) 20,000/mm^3 ≤platelets<100,000/mm^3; (ii) 500/mm^3≤ANC<1000/mm^3.

Response criteria for CHR is reported as WBC≤institutional upper limit of normal, platelets<450,000/mm^3, no blasts or promyelocytes in peripheral blood, <5% myelocytes plus metamyelocytes in peripheral blood, basophils in peripheral blood <5%, no extramedullary involvement (including no hepatomegaly or splenomegaly).

Confirmed MCyR is defined as 2 assessments of CCyR or PCyR at least 28 days apart. For CP participants entering the trial in PCyR, confirmed MCyR is defined as 2 assessments of CCyR at least 28 days apart.

MMR is defined as a ratio of reverse transcribed transcript of BCR-ABL to ABL ≤0.1% on the international scale (equivalent to a 3-log reduction in transcript).

MCyR is defined as percentage of participants with CCyR or PCyR. Cytogenetic response is the percentage of Ph+ metaphases in BM. Response is further defined as MCyR: CCyR or PCyR, where CCyR: no Ph+ cells; PCyR: 1 to 35% Ph+ cells.

Confirmed MCyR is defined as 2 assessments of CCyR or PCyR at least 28 days apart.

MMR is defined as a ratio of reverse transcribed transcript of BCR-ABL to ABL ≤0.1% on the international scale (equivalent to a 3-log reduction in transcript).

Time to response is defined as the interval from the first dose of study treatment until the criteria for response are first met, censored at the last assessment of response. Median time to response was estimated using the Kaplan-Meier method.

Duration of Response is defined as the interval between the first assessment at which the criteria for response are met until the criteria for progression are met, censored at the last date at which the criteria for response are met. Duration of response was estimated by the Kaplan-Meier method as the probability of remaining in response.

PFS is defined as the interval from the first dose of study treatment until the criteria for progression or death are met, censored at the last response assessment. Progression from CP is reported as death, development of AP or BP, loss of CHR (in the absence of cytogenetic response), confirmed by development in complete blood counts (CBCs) at least 4 weeks apart, loss of MCyR, increasing WBC in participant without CHR defined by doubling of WBC to >20K on 2 occasions at least 4 weeks apart; Progression from AP is reported as death, development of confirmed BP, loss of previous major or minor hematologic response over a 2-week period, no decrease from baseline levels in percentage blasts in peripheral blood or BM on all assessments over a 4-week period; Progression from BP or Ph+ ALL is reported as death, increasing blasts in peripheral blood or BM over a 4 week period.

OS is defined as the interval from the first dose of study treatment until death, censored at the last date at which participant was known to be alive.

An AE is any untoward medical occurrence in a participant administered a medicinal investigational drug. The untoward medical occurrence does not necessarily have to have a causal relationship with treatment. An SAE is any untoward medical occurrence that results in death; is life-threatening; requires inpatient hospitalization or prolongation of present hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect or is a medically important event that may not be immediately life-threatening or result in death or hospitalization, but may jeopardize the participant or may require intervention to prevent one of other outcomes listed in definition above, or involves suspected transmission via a medicinal product of an infectious agent. A TEAE is defined as an AE that occurs after administration of first dose of study drug and through 30 days after last dose of study drug or until start of subsequent antineoplastic therapy.