Study of Bosutinib in Japanese Adult Patients With Newly Diagnosed Chronic Phase Chronic Myelogenous Leukemia

Probability of Maintaining Major Molecular Response (MMR) at Month 36

Duration of MMR: time from first date of MMR until first date of confirmed loss of MMR, treatment discontinuation due to progressive disease (PD), or death due to PD within 28 days after last dose or censoring. PD: progression to Accelerated phase (AP) or to Blast Phase (BP). AP: 15-29% blasts in blood or marrow, or\>30% blasts plus promyelocytes in blood or marrow with blasts \<30%; ≥20% basophils in blood. BP: ≥30% Blasts in blood or bone marrow, extramedullary blast proliferation, other than in spleen. Kaplan-Meier analysis was used.

Time frame: At Month 36

Probability of Maintaining Complete Cytogenetic Response (CCyR) at Month 36

Duration of CCyR, from first date of CCyR to confirmed loss of CCyR, treatment discontinuation due to PD, death due to PD within 28 days after last dose or censoring. Confirmed loss: at least 1 Ph+ metaphase confirmed by a second determination \>=4 weeks later or unconfirmed loss followed by treatment discontinuation due to suboptimal response. PD: progression to AP or to BP. Kaplan-Meier analysis was used.

Time frame: At Month 36

Cumulative Incidence of Event Free Survival (EFS) at Month 36

EFS: time from 1st dose until 1st occurrence of 1 of the following events or censoring: 1)death from any cause 2)transformation to AP or BP 3)loss of complete hematologic response (CHR) 4)loss of CCyR 5)participants not achieving CHR: doubling of WBCs \>= 1 month apart with 2nd value \>20\*10\^9/L and maintained in subsequent assessments for \>=2 weeks. Loss of CHR: appearance of any of the following confirmed by 2nd determination\>=4 weeks later (unless associated with CML-related treatment discontinuation): WBC count: \>20.0\*10\^9/L, platelet count: \>=600\*10\^9/L, appearance of palpable spleen/other extra medullary involvement, appearance of 5% myelocytes or blasts or promyelocytes in peripheral blood. Loss of CCyR:\>= one Ph+ metaphase confirmed by 2nd determination \>=4 weeks later(unless associated with CML-related treatment discontinuation). Cumulative incidence: % of participants with event at month 36 adjusted for competing risk of treatment discontinuation without event.

Time frame: Up to Month 36

Probability of Overall Survival (OS) at Month 36

Overall survival was defined as the time from first dose of study drug to death due to any cause or censoring. Kaplan-Meier analysis was used for determination of probability of overall survival.

Time frame: Up to Month 36

Trough Plasma Concentrations of Bosutinib

Time frame: Pre-dose on Day 1, Day 28, Day 56, Day 84

Summary and Analysis of Trough Bosutinib Plasma Concentration by Major Molecular Response (MMR) Response

Trough bosutinib plasma concentration is reported classified on basis of participants with MMR response as "Yes" and "No" at specified time points. A MMR is defined as less than or equal to (\<=) 0.1 percent (%) BCR-ABL transcripts on the international scale (IS), corresponding to a \>=3-log reduction from standardized baseline with at least 3000 ABL assessed by the central laboratory.

Time frame: Pre-dose on Day 28, Day 56 and Day 84

Summary and Analysis of Trough Bosutinib Plasma Concentration by CCyR Response

Trough bosutinib plasma concentration is reported classified on basis of participants with CCyR Response as "Yes" and "No" at specified time points. CCyR is based on the prevalence of Philadelphia chromosome positive metaphases among cells in metaphase on a bone marrow sample. CCyR was defined as absence of detectable Philadelphia chromosome positive cells. CCyR was achieved when there were "0" Philadelphia chromosome positive metaphases among at least 20 metaphases from a bone marrow sample or when MMR was achieved if no bone marrow analysis was performed.

Time frame: Pre-dose on Day 28, Day 56 and Day 84

Summary of Trough Bosutinib Plasma Concentration by Total Bilirubin

Trough bosutinib plasma concentration is reported classified on basis of total bilirubin level range at baseline. Level range 1: \<=7.7 micromole per liter (micromol/L), level rage 2: \>7.7 and \<= 10.3 micromol/L, level range 3: \>10.3 and \<=12.85 micromol/L and level range 4: \>12.85 micromol/L.

Time frame: Pre-dose on Day 28, Day 56 and Day 84

Summary of Trough Bosutinib Plasma Concentration by Creatinine Clearance

Trough bosutinib plasma concentration is reported classified on basis of different ranges of creatinine clearance at baseline. Level range 1: \<=71.479 milliliter per minute (mL/min), level rage 2: \>71.479 and \<=100.936 mL/min, level range 3: \>100.936 and \<=129.355 mL/min) and level range 4: \>129.355 mL/min.

Time frame: Pre-dose on Day 28, Day 56 and Day 84

Summary of Trough Bosutinib Plasma Concentration by Aspartate Aminotransferase

Trough bosutinib plasma concentration is reported classified on basis of different ranges of aspartate aminotransferase at baseline. Level range 1: \<=22 units per liter (U/L), level rage 2: \>22 and \<=26 U/L, level range 3: \>26 and \<=33 U/L and level range 4: \>33 U/L.

Time frame: Pre-dose on Day 28, Day 56 and Day 84

Summary of Trough Bosutinib Plasma Concentration by Alanine Aminotransferase

Trough bosutinib plasma concentration is reported classified on basis of different ranges of alanine aminotransferase at baseline. Level range 1: \<=17.5 U/L, level rage 2: \>17.5 and \<=25 U/L, level range 3: \>25 and \<=32 U/L and level range 4: \>32 U/L.

Time frame: Pre-dose on Day 28, Day 56 and Day 84

Summary and Analysis of Trough Bosutinib Plasma Levels by Presence/Absence Grade 1: Diarrhea

Trough bosutinib plasma concentration is reported classified on basis of presence/ or absence of grade 1 diarrhea as "Yes" and "No" at specified time points. As per national cancer institute common terminology criteria (NCI-CTCAE) version 4.03, Grade 1: increase of \<4 stools per day over baseline.

Time frame: Pre-dose on Day 28, Day 56 and Day 84 for trough bosutinib plasma concentration up to 12 March 2019; maximum of 22 months, approximately, for the adverse event of interest

Summary and Analysis of Trough Bosutinib Plasma Levels by Presence/Absence Grade 1: Nausea

Trough bosutinib plasma concentration is reported classified on basis of presence/ or absence of grade 1 Nausea as "Yes" and "No" at specified time points. As per NCI-CTCAE version 4.03, Grade 1: loss of appetite without alteration in eating habits.

Time frame: Pre-dose on Day 28, Day 56 and Day 84 for trough bosutinib plasma concentration up to 12 March 2019; maximum of 22 months, approximately, for the adverse event of interest

Summary and Analysis of Trough Bosutinib Plasma Levels by Presence/Absence Grade 1: Vomiting

Trough bosutinib plasma concentration is reported classified on basis of presence/ or absence of grade 1 vomiting as "Yes" and "No" at specified time points. As per NCI-CTCAE version 4.03, Grade 1: 1 - 2 episodes (separated by 5 minutes) in 24 hours.

Time frame: Pre-dose on Day 28, Day 56 and Day 84 for trough bosutinib plasma concentration up to 12 March 2019; maximum of 22 months, approximately, for the adverse event of interest

Summary and Analysis of Trough Bosutinib Plasma Levels by Presence/Absence Grade 1: Thrombocytopenia

Trough bosutinib plasma concentration is reported classified on basis of presence/ or absence of grade 1 thrombocytopenia as "Yes" and "No" at specified time points. As per NCI-CTCAE version 4.03, Grade 1: platelet count decreased: 75.0 - 50.0\*10\^9/L.

Time frame: Pre-dose on Day 28, Day 56 and Day 84 for trough bosutinib plasma concentration up to 12 March 2019; maximum of 22 months, approximately, for the adverse event of interest

Number of Participants With Treatment-Emergent Adverse Events (AEs): National Cancer Institute Common Terminology Criteria for AEs (NCI CTCAE) (Version 4.03) Grade 3 or Higher

An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. The severity was graded by NCI CTCAE v.4.03. Grade 1 was mild AE. Grade 2 was moderate AE. Grade 3 was severe AE. Grade 4 was life-threatening consequences and urgent intervention indicated AE. Grade 5 was death related to AE. Number of participants with Grade 3 or higher AEs are reported.

Time frame: From first dose and up to 28 days after the last dose of study drug (maximum up to 45 months)

Number of Participants With Laboratory Abnormalities, Chemistry: National Cancer Institute Common Terminology Criteria for AEs (NCI CTCAE) (Version 4.03) Grade 3 or 4

Laboratory parameters include: Alanine aminotransferase (ALT) increased: Grade 3: \>5.0-20.0\*upper limit of normal (ULN),Grade 4:\>20.0\*ULN, Alkaline phosphatase (ALP) increased: Grade 3: \>5.0 - 20.0 x ULN, Grade 4: \>20.0 x ULN, Aspartate aminotransferase (AST) increased: Grade 3: \>5.0 - 20.0 \*ULN, Grade 4: \>20.0\*ULN. Blood bilirubin increased:Grade 3:\>3.0 - 10.0\*ULN,Grade 4: \>10.0\*ULN, creatine phosphokinase (CPK) increased: Grade 3: \>5\*ULN-10\*ULN, Grade 4: \>10\*ULN, Hyperglycemia: Grade 3: \>250-500 milligrams/deciliter (mg/dL), Grade 4: \>500 mg/dL. Hypermagnesemia: Grade 3: \>3.0-8.0 mg/dL, Grade 4: \>8.0 mg/dL, Hypokalemia: Grade 3: \<3.0-2.5 millimoles/ liter (mmol/L), Grade 4:\<2.5 mmol/L); Hyponatremia: Grade 3: \<130-120 mmol/L, Grade 4: \<120 mmol/L. Hypophosphatemia: Grade 3: \<2.0-1.0 mg/dL, Grade 4: \<1.0 mg/dL. Lipase increased: Grade 3:\>2.0-5.0\*ULN, Grade 4: \>5.0\*ULN. Serum amylase increased: Grade 3: \>2.0 - 5.0\*ULN, Grade 4: \>5.0\* ULN.

Time frame: From first dose and up to 28 days after the last dose of study drug (maximum up to 45 months)

Number of Participants With Laboratory Abnormalities, Hematology: National Cancer Institute Common Terminology Criteria for AEs (NCI CTCAE) (Version 4.03) Grade 3 or 4

Laboratory parameters include: Anemia: Grade 3: hemoglobin (Hgb) \<8.0 g/dL, Grade 4: Life-threatening consequences; urgent intervention indicated, Lymphocyte count decreased: Grade 3: \<500 - 200/millimeter(mm)\^3, Grade 4: \<200/mm\^3, Neutrophil count decreased: Grade 3: \<1000 - 500/mm\^3, Grade 4: \<500/mm\^3, Platelet count decreased: Grade 3: \<50.0 - 25.0\*10\^9 /L, Grade 4: \<25.0\*10\^9 /L. White blood cell decreased: Grade 3: \<2.0 - 1.0\*10\^9 /L, Grade 4: \<1.0\*10\^9 /L. Only those rows in which at least 1 participant had data were reported.

Time frame: From first dose and up to 28 days after the last dose of study drug (maximum up to 45 months)

Number of Participants With Laboratory Abnormalities, Coagulation: National Cancer Institute Common Terminology Criteria for AEs (NCI CTCAE) (Version 4.03) Grade 3

Coagulation parameters include: APTT prolonged (Grade 3: \>2.5\*ULN and hemorrhage), and INR increased (Grade 3 \>2.5\*ULN).

Time frame: From first dose and up to 12 March 2019; maximum of 22 months, approximately

Number of Participants With Clinically Significant Vital Signs Findings

Vital signs included: body weight Increase \>= 10% change from baseline and Decrease \>= 10% change from baseline, systolic blood pressure in millimeters of mercury (mmHg): \<80 mmHg and \>210 mmHg, diastolic blood pressure in mmHg: \<40 mmHg and \>130 mmHg, heart rate in beats per minute (bpm): \<40 bpm and \>150 bpm, temperature in degree Celsius (C): \<32 and \>40 degree C.

Time frame: From first dose and up to 28 days after the last dose of study drug (maximum up to 45 months)

Number of Participants With Clinically Significant Electrocardiogram (ECG) Findings

ECG parameters included: QTc corrected by Bazett's (QTcB) interval: \>500 msec (milliseconds), QTc corrected by Fridericia's (QTcF) interval: \>500 msec and \>450 msec (men) or \>470 msec (women).

Time frame: From first dose and up to 28 days after the last dose of study drug (maximum up to 45 months)

Number of Participants Assessed for Left Ventricular Ejection Fraction

Interpretation categories included: a) normal, b) abnormal, not clinically significant and c) abnormal, clinically significant.

Time frame: At end of treatment for patients who discontinued treatment post initial dose (up to 12 March 2019)

Percentage of Participants With Major Molecular Response (MMR) at Months 3, 6, 9 and 18

A MMR is defined as less than or equal to (\<=) 0.1 percent (%) BCR-ABL transcripts on the international scale (IS), corresponding to a \>=3-log reduction from standardized baseline with at least 3000 ABL assessed by the central laboratory. The MMR value counted only if the response was demonstrated at the designated visit; any MMR gained and lost, or never achieved at or before the designated visit was considered as non-responder.

Time frame: Month 3, 6, 9 and 18

Percentage of Participants With Molecular Response 1 (MR1) at Month 3

MR1 is defined as \<= 10% BCR-ABL with a minimum of 3,000 ABL transcripts assessed by the central laboratory.

Time frame: Month 3

Percentage of Participants With Molecular Response 2 (MR2) at Month 6

MR2 is defined as \<= 1% BCR-ABL with a minimum of 3,000 ABL transcripts assessed by the central laboratory.

Time frame: Month 6

Percentage of Participants With Molecular Response 4.0 (MR4.0) and Molecular Response 4.5 (MR4.5) at Months 3, 6, 9 and 12

MR4.0 defined as either: detectable disease with \<= 0.01% BCR-ABL with a minimum of 9,800 ABL transcripts assessed by the central laboratory, or undetectable disease in cDNA with a minimum of 9,800 ABL transcripts assessed by the central laboratory. MR4.5 defined as either: detectable disease with \<= 0.0032% BCR-ABL with a minimum of 30,990 ABL transcripts assessed by the central laboratory or undetectable disease in cDNA with a minimum of 30,990 ABL transcripts assessed by the central laboratory. The MMR value counted only if the response was demonstrated at the designated visit; any MMR gained and lost, or never achieved at or before the designated visit was considered as non-responder.

Time frame: Months 3, 6, 9 and 12

Cumulative Incidence of Major Molecular Response (MMR) at Month 36

Percentage of participants with MMR at Month 36. Cumulative incidence of MMR was measured from first dose to the first date of response. Documented participants who did not have an MMR response were censored at the last molecular assessment. A MMR is defined as \<=0.1% BCR-ABL transcripts on the international scale, corresponding to a \>=3-log reduction from standardized baseline with at least 3000 ABL assessed by the central laboratory. Cumulative incidence: % of participants with event at month 36 adjusted for competing risk of treatment discontinuation without the event.

Time frame: At Month 36

Cumulative Incidence of Molecular Response 4.0 (MR4.0) at Month 36

Percentage of participants with MR4.0 at month 36. Cumulative incidence of MR4.0, was measured from first dose to the first date of MR 4.0. Documented participants who did not have an MR4.0 response were censored at the last molecular assessment. MR4.0 defined as either 1) detectable disease with \<=0.01% BCR-ABL IS or 2) undetectable disease in cDNA with a minimum number of 9800 ABL transcripts specified by the central laboratory. Cumulative incidence: % of participants with event at month 36 adjusted for competing risk of treatment discontinuation without the event.

Time frame: At Month 36

Cumulative Incidence of Molecular Response 4.5 (MR4.5) at Month 36

Percentage of participants with MR4.5 at Month 36. Cumulative incidence of MR 4.5 was measured from first dose to the first date of MR 4.5. Documented participants who did not have an MR4.5 response were censored at the last molecular assessment. MR 4.5 defined as either 1) detectable disease with \<=0.0032% BCR-ABL IS or 2) undetectable disease in cDNA with a minimum number of 30990 ABL transcripts specified by the central laboratory in the same volume of cDNA used to test for BCR-ABL. Cumulative incidence: % of participants with event at month 36 adjusted for competing risk of treatment discontinuation without the event.

Time frame: At Month 36

Cumulative Incidence of Complete Cytogenetic Response (CCyR) at Month 36

Percentage of participants with CCyR at Month 36. Cumulative incidence of CCyR, was measured from first dose to the first date of CCyR. Documented participants who did not have a CCyR response were censored at the last cytogenetic assessment. CCyR was defined as absence of detectable Philadelphia chromosome positive cells. CCyR was achieved when there were "0" Philadelphia chromosome positive metaphases among at least 20 metaphases from a bone marrow sample or when MMR was achieved if no bone marrow analysis was performed. Cumulative incidence: % of participants with event at month 36 adjusted for competing risk of treatment discontinuation without the event.

Time frame: At Month 36

Percentage of Participants With Cumulative Complete Haematological Response (CHR)

CHR is based on peripheral blood assessment: WBC \<=10\*10\^9/L, basophils \<5% in blood, no myelocytes, promyelocytes, myeloblasts in the blood differential, platelet count \<450\* 10\^9/L, spleen non-palpable. In the absence of extramedullary disease info, it was assumed that spleen was non-palpable. If CHR could not be assessed due to one or more missing components of CHR and participant had a MMR or a CCyR and all assessed components of CHR were within appropriate limits, then CHR was imputed using CCyR or MMR. CHR must be of at least 4 weeks in duration and confirmed by 2 assessments at least 4 weeks apart.

Time frame: Up to Month 36

Cumulative Incidence of Transformation to Accelerated Phase (AP) and Blast Phase (BP) at Month 36

Percentage of participants with transformation to AP and BP at Month 36. Transformation to AP or to BP CML defined as the time from first dose to the first date of transformation to accelerated phase or to blast phase CML. Documented participants who did not progress to AP or BP were censored at the last hematologic assessment. The transformation to AP or to BP was counted while participants were on treatment up to 28 days after last dose. Cumulative incidence: % of participants with event at month 36 adjusted for competing risk of treatment discontinuation without the event.

Time frame: At Month 36

Number of Participants With BCR-ABL Mutation at Treatment Discontinuation

Mutation analysis was performed in case of either lack of response, suboptimal response or loss of response, or at the End of Treatment/Withdrawal visit.

Time frame: Maximum up to 44 months of treatment