Comparison of Doravirine, Tenofovir, Lamivudine (MK-1439A) and ATRIPLA™ in Treatment-Naive Human Immunodeficiency Virus Type 1 (HIV-1)-Infected Participants (MK-1439A-021)

The percentage of participants in each arm with HIV-1 RNA levels <50 copies/mL at Week 48 was determined. Plasma HIV-1 RNA levels were quantified with the Abbott RealTime HIV-1 Assay. Data were handled according to the US Food and Drug Administration (FDA) "snapshot" approach in which all missing data are considered treatment failures, regardless of the reason.

The percentage of participants in each arm experiencing ≥1 pre-specified Tier-1 neuropsychiatric AEs was determined. The list of Tier-1 neuropsychiatric AE categories included "dizziness", "sleep disorders and disturbances", and "altered sensorium" (including disturbance in attention).

The percentage of participants in each arm with HIV-1 RNA levels <50 copies/mL at Week 96 were determined. Plasma HIV-1 RNA levels were quantified with the Abbott RealTime HIV-1 Assay. The US Food and Drug Administration (FDA) "snapshot" approach (i.e., all missing data handled as treatment failures, regardless of the reason) were used for efficacy analyses.

The percentage of participants in each arm with HIV-1 RNA levels <40 copies/mL (including target detected and target not detected) at Week 48 was determined. Plasma HIV RNA levels were quantified with the Abbott RealTime HIV-1 Assay. Data were handled according to the US Food and Drug Administration (FDA) "snapshot" approach in which all missing data are considered treatment failures, regardless of the reason.

The percentage of participants in each arm with HIV-1 RNA levels <40 copies/mL (including target detected and target not detected) at Week 96 were determined. Plasma HIV-1 RNA levels were quantified with the Abbott RealTime HIV-1 Assay. The US Food and Drug Administration (FDA) "snapshot" approach (i.e., all missing data handled as treatment failures, regardless of the reason) were used for efficacy analyses.

The mean change from baseline in CD4 cell counts at Week 48 was assessed using the Observed Failure (OF) approach. With the OF approach, baseline values were carried forward for participants who discontinued prior to Week 48 due to lack of efficacy. Cell counts at Baseline and Week 48 were measured and expressed as cells/mm^3, and percent change was then calculated as [(Baseline counts - Week 48 counts)*100]. CD4 cell counts were quantified by a central laboratory using a commercially available assay.

The mean change from baseline in CD4 cell counts at Week 96 were assessed using the OF approach. With the OF approach, baseline values were carried forward for participants who discontinued prior to Week 96 due to lack of efficacy. Cell counts at Baseline and Week 96 were measured and expressed as cells/mm^3, and percent change was calculated as [(Baseline counts - Week 96 counts)*100]. CD4 cell counts were quantified by a central laboratory using a commercially available assay.

An AE is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment.

An AE is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment.

The percentage of participants in each arm experiencing ≥1 pre-specified Tier-2 neuropsychiatric AEs was determined. The list of Tier-2 neuropsychiatric AE categories included "depression and suicide/self-injury" and "psychosis and psychotic disorders".

The mean percent change from baseline in fasting (fast duration of ≥8 hours) LDL-C levels at Week 48 was determined for each arm. The Last Observation Carry Forward (LOCF) approach was applied to missing data and data collected after a participant initiated lipid-modifying therapy.

The mean percent change from baseline in fasting (fast duration of ≥8 hours) non-HDL-C levels at Week 48 was determined for each arm. The LOCF approach was applied to missing data and data collected after a participant initiated lipid-modifying therapy.

The mean percent change from baseline in fasting (fast duration of ≥8 hours) cholesterol levels at Week 48 was determined for each arm. The LOCF approach was applied to missing data and data collected after a participant initiated lipid-modifying therapy.

The mean percent change from baseline in fasting (fast duration of ≥8 hours) triglycerides levels at Week 48 was determined for each arm. The LOCF approach was applied to missing data and data collected after a participant initiated lipid-modifying therapy.

The mean percent change from baseline in fasting (fast duration of ≥8 hours) HDL-C levels at Week 48 was determined for each arm. The LOCF approach was applied to missing data and data collected after a participant initiated lipid-modifying therapy.

The percentage of participants in each arm with HIV-1 RNA levels BLoQ of 40 copies/mL and target not detected at Week 48 was determined. Plasma HIV RNA levels were quantified with the Abbott RealTime HIV-1 Assay. Data were handled as observed.

The percentage of participants in each arm with HIV-1 RNA levels BLoQ of 40 copies/mL and target not detected at Week 96 was determined. Plasma HIV RNA levels was quantified with the Abbott RealTime HIV-1 Assay. Data was handled as observed.

Plasma samples were collected for analysis of doravirine concentration at Week 48. A total of 2 samples were collected: 1 prior to dosing and 1 collected between 0.5 and 2 hours post-dose.