Study to Separately Evaluate the Activity of Talacotuzumab (JNJ-56022473) or Daratumumab in Transfusion-Dependent Participants With Low or Intermediate-1 Risk Myelodysplastic Syndromes (MDS) Who Are Relapsed or Refractory to Erythropoiesis-Stimulating Agent (ESA) Treatment

Percentage of participants who achieved RBC TI lasting at least 8 weeks were reported. RBC TI was defined as absence of RBC transfusion during any consecutive 56 days (8 weeks) post randomization.

Percentage of participants who achieved RBC TI lasting at least 24 weeks were reported. RBC TI was defined as absence of RBC transfusion during any consecutive 56 days (8 weeks) post randomization.

Time to transfusion independence (TI) was defined as time to the start of the TI interval. TI was defined as absence of RBC transfusion during any consecutive 56 days (8 weeks) post randomization.

Duration of TI was reported. TI was defined as absence of RBC transfusion during any consecutive 56 days (8 weeks) post randomization.

Percentage of participants who met IWG criteria for transfusion reduction were reported. IWG criteria for transfusion reduction: at least 4 units reduction in RBC transfusions in the best 8-week interval. The best 8-week interval was a post-baseline 8-week interval where the participant had the fewest post-baseline RBC transfusion units.

Percentage of participants with Myeloid Growth Factors (MGF) usage (who had used at least 1 dose of MGF) were reported.

Percentage of participants with HI per International Working Group (IWG) 2006 by investigator assessment were reported. Response criteria per IWG 2006 for HI: Erythroid response (pretreatment, less than [<]11 gram per deciliter [g/dL]) - hemoglobin increase by greater than or equal to (>=)1.5 g/dL, relevant reduction of units of RBC transfusions by an absolute number of at least 4 RBC transfusions/8 weeks compared with the pretreatment transfusion number in the previous 8 weeks. Only RBC transfusions given for a Hb of <=9 g/dL pretreatment counted in the RBC transfusion response evaluation; Platelet response (pretreatment, <100*10^9/L) - absolute increase of >=30*10^9/L for participants starting with >20*10^9/L platelets. Increase from <20*10^9/L to >20*10^9/L and by at least 100 percent (%); Neutrophil response (pretreatment, <1*10^9/L) - at least 100% increase and an absolute increase >0.5*10^9/L.

Percentage of participants with CR and marrow CR were reported. CR per International Working Group (IWG) 2006 Response criteria: Bone marrow - less than or equal to (<=)5% myeloblasts with normal maturation of all cell lines, persistent dysplasia noted; Peripheral blood - hemoglobin >=11 g/dL; platelets >=100*10^9/L; neutrophils >=1.0*10^9/L; blasts, 0%. Marrow CR: Bone marrow - <=5% myeloblasts and decrease by >=50% over pretreatment; Peripheral blood - if HI responses, they were noted in addition to marrow CR.

Percentage of participants with PR were reported. PR per International Working Group (IWG) 2006 Response criteria: All CR criteria if abnormal before treatment except: Bone marrow blasts decreased by >=50% over pretreatment but still >5%, cellularity and morphology not relevant.

Percentage of participants with cytogenetic response were reported. Cytogenetic response per International Working Group (IWG) 2006 Response criteria: Complete - disappearance of the chromosomal abnormality without appearance of new ones; Partial - at least 50% reduction of the chromosomal abnormality.

The overall survival was defined as the time from the date of first dose of study drug to date of death from any cause. Median overall survival was estimated by using the Kaplan-Meier method.

Time to progression to acute myeloid leukemia was reported. Disease progression as per IWG response criteria: For participants with:

<5% blasts: >=50% increase in blasts to >5% blasts; 5%-10% blasts: >=50% increase to >10% blasts; 10%-20% blasts: >=50% increase to >20% blasts; 20%-30% blasts: >=50% increase to >30% blasts. Any of the following: >=50% decrement from maximum remission/response in granulocytes or platelets; reduction in hemoglobin by >=2 g/dL; transfusion dependence.