A Study to Compare the Efficacy and Safety of Oral Azacitidine Plus Best Supportive Care Versus Best Supportive Care as Maintenance Therapy in Japanese Participants With Acute Myeloid Leukemia (AML) in Complete Remission

The time from randomization to the date of documented relapse after CR or CRi per central review, or death from any cause, whichever occurs first. Participants who are still alive without documented relapse after CR or CRi, or who were lost to follow-up without documented relapse, will be censored at the date of their last response assessment.

The time from randomization to death from any cause and will be calculated using the randomization date and date of death, or date of last follow-up for censored participants. All participants will be followed until dropout, death, or study termination. Participants who dropout or are alive at study termination will have their OS times censored at the time of last contact, as appropriate.

The interval from the date of randomization to the date of documented relapse after CR or CRi, as defined according to the IWG AML response criteria. Time to relapse will be analyzed using a competing risk analysis where death without documented relapse is treated as a competing risk for relapse from CR/CRi. Similar censoring rules as in primary analysis of RFS will be applied.

The interval from the date of randomization to the date of discontinuation from IP. Subjects who are ongoing in treatment at the time of study closure will be censored at the date of last visit.

Number of participants with clinically significant changes in physical examination

Vital signs include the following: systolic blood pressure, diastolic blood pressure, heart rate, respiratory rate, temperature and weight.

Concomitant medications are defined as non-study medications that are started after the date of randomization but before the end of the study treatment period or started on or before the date of randomization but ended or remain ongoing during the study treatment period.

The FACIT-Fatigue Scale is a short, 13-item, easy-to-administer tool that measures an individual's level of fatigue during usual daily activities over the past week. The level of fatigue is measured on a five-point Likert scale (0 = not at all fatigued to 4 = very much fatigued). It has scores that range from 0 to 52, with higher scores indicating less fatigue. Quality of life (QoL)scores on these FACIT scales significantly decline as patient performance status worsens.

The European Quality of Life 5D-5L Scale (EQ-5D-5L) assesses general health-related quality of life. Health is defined in 5 dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems, and extreme problems. Responses are coded so that a '1' indicates no problem, and '5' indicates the most serious problem. The responses for the 5 dimensions are combined in a 5-digit number. The EQ-5D-5L health utility index (HUI) is assessed using the Crosswalk algorithm for France based on the individual responses to the 5 EQ-5D-5L domains ranging from -0.530 to 1.000. The smallest change considered clinically meaningful, is defined as a score difference of 0.08 points. The lower the score the better.

Cmax is defined as maximum plasma concentration of the drug.

Tmax is defined is the time to maximum plasma concentration

Area under the plasma concentration time-curve. AUC from time 0 to the last time of quantifiable concentration.

the time required for the amount or concentration of a drug to decrease by one-half

the volume of plasma from which a substance is completely removed per unit time.

the amount of drug in the body to the concentration of drug measured in a biological fluid