Trial Outcomes & Findings for A Study of Switching to RPV Plus Other ARVs in HIV-1-infected Children (Aged 2 to <12 Years) Who Are Virologically Suppressed (NCT NCT04012931)

Participant flow is based on the initial administered dose, irrespective of subsequent dose-alterations. Out of the 2 participants weighing \<20 kg who received rilpivirine 15 mg, 1 participant switched to rilpivirine 12.5 mg group after the first 4 weeks. This participant was counted in the \<20 kg rilpivirine 15 mg group in the Participant flow section, whereas it was counted in the \<20 kg rilpivirine 12.5 mg group for the pharmacokinetic assessments reported in the outcome measure section.

A Study of Switching to RPV Plus Other ARVs in HIV-1-infected Children (Aged 2 to <12 Years) Who Are Virologically Suppressed

AUC(0-24h) was defined the area under the plasma concentration-time curve from time of administration up to 24 hours postdose of rilpivirine. As planned, data was not summarized for arms where number of participants analyzed was less than 3. Only individual participant data was available and reported in this outcome measure. Out of the 2 participants weighing \<20 kg who received rilpivirine 15 mg, 1 participant switched to rilpivirine 12.5 mg group after the first 4 weeks. This participant was counted in the \<20 kg rilpivirine 12.5 mg group for the pharmacokinetic assessments, hence the number of participants analyzed for this outcome measure in this arm are exceeding the participants that started this arm. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

AUC(0-24h) was defined the area under the plasma concentration-time curve from time of administration up to 24 hours postdose of rilpivirine. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

AUC(0-24h) was defined the area under the plasma concentration-time curve from time of administration up to 24 hours postdose of rilpivirine. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

AUC(0-24h) was defined the area under the plasma concentration-time curve from time of administration up to 24 hours postdose of rilpivirine. As planned, data was not summarized for arms where number of participants analyzed was less than 3. Only individual participant data was available and reported in this outcome measure. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

Percentage of participants with a HIV-1 RNA less than (\<) 50 copies per mL and greater than or equal to (\>=)50 copies/mL were assessed using Food and Drug Administration (FDA) snapshot approach which defines a participant's virologic response status using only the viral load at the predefined time point within a window of time, along with study drug discontinuation status. HIV-1 RNA level \<50 copies per mL, was considered as virologic success and \>= 50 copies/mL was considered as virological failure as per the snapshot approach. The FDA snapshot analysis at Week 24 and Week 48 was based on the last observed plasma viral load data within the visit window (that is, Weeks 24 and 48).

Percentage of participants with viral load (plasma HIV-1 RNA levels) \<400 copies/mL and \>=400 copies/mL were assessed by the FDA snapshot approach which defines a participant's virologic response status using only the viral load at the predefined time point within a window of time, along with study drug discontinuation status. HIV-1 RNA level \<400 copies per mL, was considered as virologic success and \>=400 copies/mL was considered as virological failure as per the snapshot approach. The FDA snapshot analysis at Week 24 and Week 48 was based on the last observed plasma viral load data within the visit window (that is, Weeks 24 and 48).

The immunologic change was determined by changes in CD4+ cell count using non-completer = failure imputation, that was, missing values after discontinuation were imputed with the baseline value, thus resulting in a 0 change. For intermittent missing data, last observation carried forward (LOCF) approach was applied.

C(0h) was defined as the predose plasma concentration of rilpivirine. As planned, data was not summarized for arms where number of participants analyzed was less than 3. Only individual participant data was available and reported in this outcome measure. Out of the 2 participants weighing \<20 kg who received rilpivirine 15 mg, 1 participant switched to rilpivirine 12.5 mg group after the first 4 weeks. This participant was counted in the \<20 kg rilpivirine 12.5 mg group for the pharmacokinetic assessments, hence the number of participants analyzed for this outcome measure in this arm are exceeding the participants that started this arm. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

C(0h) was defined as the predose plasma concentration of rilpivirine. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

C(0h) was defined as the predose plasma concentration of rilpivirine. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

C(0h) was defined as the predose plasma concentration of rilpivirine. As planned, data was not summarized for arms where number of participants analyzed was less than 3. Only individual participant data was available and reported in this outcome measure. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

Cmax was defined as the maximum observed plasma concentration of rilpivirine. As planned, data was not summarized for arms where number of participants analyzed was less than 3. Only individual participant data was available and reported in this outcome measure. Out of the 2 participants weighing \<20 kg who received rilpivirine 15 mg, 1 participant switched to rilpivirine 12.5 mg group after the first 4 weeks. This participant was counted in the \<20 kg rilpivirine 12.5 mg group for the pharmacokinetic assessments, hence the number of participants analyzed for this outcome measure in this arm are exceeding the participants that started this arm. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

Cmax was defined as the maximum observed plasma concentration of rilpivirine. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

Cmax was defined as the maximum observed plasma concentration of rilpivirine. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

Cmax was defined as the maximum observed plasma concentration of rilpivirine. As planned, data was not summarized for arms where number of participants analyzed was less than 3. Only individual participant data was available and reported in this outcome measure. As per protocol, the intensive PK samples were collected at anytime during Day 28 to Day 32 after first dose at the specified dose regimen.

Percentage of participants with viral genotype at the time of virologic failure (that is, HIV 1 RNA \>=50 copies/mL and \>=400 copies/mL) per FDA snapshot approach were reported. Confirmed virologic failure was defined as 2 consecutive HIV-1 RNA plasma viral load measurements \>=200 copies/mL and suspected virologic failure was defined as HIV-1 RNA \>=200 copies/mL. No participant achieved virologic failure hence this outcome measure could not be evaluated.

Percentage of participants with treatment adherence greater than (\>) 95 percent (%) as assessed by tablet count (study intervention accountability) up to Weeks 24 and 48 of study treatment were reported. Treatment adherence was defined as having a treatment adherence of \>95% by tablet count.

The immunologic change was determined by changes in CD4+ cell count using non-completer = failure imputation, that was, missing values after discontinuation were imputed with the baseline value, thus resulting in a 0 change. For intermittent missing data, last observation carried forward (LOCF) approach was applied.