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Participants were classified into the following dose groups at each timepoint: 1) ribociclib 600 mg: consisted of all participants who provided evaluable concentrations after receiving at least 10 consecutive daily ribociclib doses of 600 mg immediately prior to the blood collection without a dose change or interruption. 2) ribociclib 400 mg: consisted of all participants who provided evaluable concentrations after receiving at least 10 consecutive daily ribociclib doses of 400 mg immediately prior to the blood collection without a dose change or interruption. 3) ribociclib 200 mg: consisted of all participants who provided evaluable concentrations after receiving at least 10 consecutive daily ribociclib doses of 200 mg immediately prior to the blood collection without a dose change or interruption.","dispersionType":"Geometric Coefficient of Variation","groups":[{"description":"Ribociclib was administered orally at a daily dose of 600mg for 21 consecutive days within a 28-day cycle. This treatment was combined with fulvestrant, which was administered via intramuscular injections of 500mg every 28 days starting on Day 1 of each cycle. Additionally, an extra dose of fulvestrant was given on Day 15 of Cycle 1.","id":"OG000","title":"Ribociclib + Fulvestrant"}],"paramType":"GEOMETRIC_MEAN","populationDescription":"All participants with at least one evaluable ribociclib concentration. Number analyzed indicated the number of participants with an evaluable ribociclib concentration at the specified time point.","reportingStatus":"POSTED","timeFrame":"Cycle 1 and Cycle 2 at Day 15 pre-dose and at 2, 4, and 6 hours post-dose. Cycle=28 days","title":"Ribociclib Plasma Concentrations","type":"SECONDARY","unitOfMeasure":"nanogram (ng) / miliLiter (mL)"}