Study to Evaluate Efficacy and Safety of Darunavir/Cobicistat/Emtricitabine/Tenofovir Alafenamide (D/C/F/TAF) Regimen Versus Boosted Protease Inhibitor (bPI) Along With Emtricitabine/Tenofovir Disoproxil Fumarate (FTC/TDF) Regimen in Virologically-Suppressed, HIV-1 Infected Participants

Percentage of Participants With Virologic Rebound (Plasma HIV-1 RNA >=20 Copies/mL) Cumulative Through 48 Weeks

Virologic rebound was defined as: confirmed plasma HIV-1 RNA \>=20 copies/mL up to, and including the upper bound of the Week 48 window (ie, 54 weeks) and last available on-treatment (single) HIV-1 RNA \>=20 copies/mL at premature discontinuation (irrespective of reason). Percentage of participants with virologic rebound were reported.

Time frame: Through 48 Weeks

Percentage of Participants With Virologic Rebound (Plasma HIV-1 RNA >=200 Copies/mL) Cumulative Through 48 Weeks

Virologic rebound was defined as: confirmed plasma HIV-1 RNA \>=200 copies/mL up to, and including the upper bound of the Week 48 window (ie, 54 weeks) and last available on-treatment (single) HIV-1 RNA \>=200 copies/mL at premature discontinuation (irrespective of reason). Percentage of participants with virologic rebound were reported.

Time frame: Through 48 Weeks

Percentage of Participants With Non-Virologic Rebound at Week 48 by Kaplan-Meier Estimates

Virologic rebound was defined as: confirmed plasma HIV-1 RNA \>=50 copies/mL up to, and including the upper bound of the Week 48 window (ie, 54 weeks) and last available on-treatment (single) HIV-1 RNA \>=50 copies/mL at premature discontinuation (irrespective of reason). Here Kaplan-Meier estimates percentage of participants with non-virologic rebound at week 48.

Time frame: Baseline up to Week 48

Percentage of Participants Experiencing Grade 3 and 4 Adverse Events (AEs), Serious Adverse Events (SAEs), and Premature Discontinuation Due to AEs Through Week 48

An AE is any untoward medical occurrence in participant who received study drug without regard to possibility of causal relationship. Grade 3 (Severe) events were symptoms causing inability to perform usual social \& functional activities. Grade 4 (Life-threatening) events were symptoms causing inability to perform basic self-care functions or medical or operative intervention indicated to prevent permanent impairment, persistent disability, or death.

Time frame: Up to Week 48

Change From Baseline in Serum Creatinine Levels at Weeks 24 and 48

Change from baseline in serum creatinine levels at Weeks 24 and 48 was assessed.

Time frame: Baseline and Weeks 24 and 48

Change From Baseline in Estimated Glomerular Filtration Rate Based on Serum Creatinine (eGFRcr, by Cockcroft-Gault Formula [eGFRcg]) at Weeks 24 and 48

Change from baseline in eGFRcr (by Cockcroft-Gault formula) was assessed at Weeks 24 and 48. eGFRcr according to the Cockcroft Gault formula- Male: (140 - age in years)\*(weight in kilogram \[kg\])/72\*(serum creatinine in milligram per deciliter \[mg/dL\])=eGFRcr (milliliter per minute \[mL/min\]); Female: (140 - age in years)\*(weight in kg)/72\*(serum creatinine in mg/dL)\*0.85=eGFRcr (mL/min).

Time frame: Baseline, Weeks 24 and 48

Change From Baseline in Estimated Glomerular Filtration Rate Based on Serum Creatinine (eGFRcr, by Chronic Kidney Disease Epidemiology Collaboration [CKD-EPI]) at Weeks 24 and 48

Change from baseline in eGFRcr (by CKD-EPI) was assessed at Weeks 24 and 48. eGFRcr per CKD-EPI formula - Female: 1) Serum creatinine (Scr) less than or equal to (\<=)0.7 mg/dL: 144\*(Scr/0.7)\^-0.329\*0.993age; 2) Scr greater than (\>)0.7 mg/dL: 144\*(Scr/0.7)\^-1.209\*0.993age. Male: 1) Scr \<=0.9 mg/dL: 141\*(Scr/0.9)\^-0.411\*0.993age; 2) Scr \>0.9 mg/dL: 141\*(Scr/0.9)\^-1.209\*0.993age.

Time frame: Baseline, Weeks 24 and 48

Change From Baseline in Estimated Glomerular Filtration Rate Based on Serum Cystatin C (eGFRcyst, by Chronic Kidney Disease Epidemiology Collaboration [CKD-EPI]) at Weeks 24 and 48

Change from baseline in eGFRcyst (by CKD-EPI) was assessed at Weeks 24 and 48. eGFRcyst according to the CKD-EPI formula - 1) Serum Cystatin C (Scyst) \<=0.8 mg/L: 133\*(Scyst/0.8)\^-0.499\*0.996age (\*0.932 if female); 2) Scyst \>0.8 mg/L: 133\*(Scyst/0.8)\^-1.328\*0.996age (\*0.932 if female).

Time frame: Baseline, Weeks 24 and 48

Change From Baseline in Urine Albumin to Creatinine Ratio (UACR) and Urine Protein to Creatinine Ratio (UPCR) at Weeks 24 and 48

Change from baseline in UACR and UPCR was assessed at Weeks 24 and 48. Lower levels of albumin or protein in the urine indicates better proximal tubular function.

Time frame: Baseline, Weeks 24 and 48

Change From Baseline in Urine Retinol Binding Protein to Creatinine Ratio (URBPCR) and Urine Beta-2 Microglobulin to Creatinine Ratio (UB2MGCR) at Weeks 24 and 48

Change from baseline in URBPCR and UB2MGCR was assessed at Weeks 24 and 48. Retinol binding protein is a marker of proximal tubular function.

Time frame: Baseline, Weeks 24 and 48

Percent Change From Baseline in Urine Fractional Excretion of Phosphate (FEPO4) at Weeks 24 and 48

Percent change from baseline in urine FEPO4 was assessed at Weeks 24 and 48.

Time frame: Baseline, Weeks 24 and 48

Percentage of Participants With Virologic Response Based on HIV-1 RNA Less Than (<)20, <50, and <200 Copies/mL Threshold at Week 48 as Defined by the Food and Drug Administration (FDA) Snapshot Approach

Percentage of participants with virologic response based on HIV-1 RNA \<20, \<50, and \<200 copies/mL threshold were analyzed at Week 48 using FDA snapshot approach. FDA Snapshot approach analysis was based on the last observed viral load data: virologic response was defined as HIV-1 RNA \<20/50/200 copies/mL (observed case).

Time frame: Week 48

Percentage of Participants With Virologic Response Based on HIV-1 RNA <20, <50, and <200 Copies/mL Threshold at Week 48 as Defined by the Time to Loss of Virologic Response (TLOVR) Algorithm

Percentage of participants with virologic response based on HIV-1 RNA \<20, \<50, and \<200 copies/mL threshold were analyzed at Week 48 using TLOVR algorithm approach. TLOVR was defined as sustained HIV-1 RNA \<20/50/200 copies/mL.

Time frame: Week 48

Change From Baseline in Cluster of Differentiation 4 Plus (CD4+) Cell Count at Weeks 24 and 48

Change from baseline in CD4+ cell count was assessed at Weeks 24 and 48.

Time frame: Baseline, Weeks 24 and 48

Percentage of Participants With Treatment Adherence of Greater Than (>)95 Percent (%) (Approach 1) Through Week 48

Treatment adherence (defined as adherence of \>95%) was assessed by the drug accountability cumulative through Week 48 (Approach 1).

Time frame: Through Week 48

Percentage of Participants With Treatment Adherence of >95% (Approach 2) Through Week 48

Treatment adherence (defined as adherence of \>95%) was assessed by the drug accountability cumulative treatment adherence up to time point where not more than one bottle was missing, or if available, through Week 48, whichever came sooner (Approach 2).

Time frame: Through Week 48

Number of Participants With Resistance to Study Drug

HIV-1 genotypes were analyzed from samples of participants with confirmed virologic rebound (virologic rebound was defined as: confirmed HIV-1 RNA \>=50 copies/mL up to, and including the upper bound of the Week 48 window) and with HIV-1 RNA value \>=400 copies/mL or who discontinued with last HIV-1 RNA \>=400 copies/mL. Number of participants who developed resistance to any of the study drug was determined.

Time frame: Up to Week 48

Predose (Trough) Plasma Concentration (C0h) of Darunavir

Predose (trough) plasma concentration (C0h) of darunavir was determined. Pharmacokinetic (PK) data was only analyzed for participants in the D/C/F/TAF group as per planned analysis.

Time frame: Predose at Weeks 2, 4, 8, 12, 24, 36, and 48

Percent Change From Baseline in Serum Procollagen 1 N-Terminal Propeptide (P1NP) and Serum Collagen Type 1 Beta Carboxy Telopeptide (CTX) Levels at Weeks 24 and 48

Percent change from baseline in bone biomarkers: P1NP and CTX was assessed at Weeks 24 and 48.

Time frame: Baseline, Weeks 24 and 48

Percent Change From Baseline in Parathyroid Hormone (PTH) at Weeks 24 and 48

Percent change from baseline in bone biomarker: PTH was assessed at Weeks 24 and 48.

Time frame: Baseline, Weeks 24 and 48

Percent Change From Baseline in 25-hydroxy Vitamin D at Weeks 24 and 48

Percent change from baseline in bone biomarker: 25-hydroxy vitamin D was assessed at Weeks 24 and 48.

Time frame: Baseline, Weeks 24 and 48

Percent Change From Baseline in Spine and Hip Bone Mineral Density (BMD) at Weeks 24 and 48

Percent change from baseline in spine and hip BMD was assessed at Weeks 24 and 48.

Time frame: Baseline, Weeks 24 and 48

Change From Baseline in Bone Mineral Density (BMD) T-Score at Weeks 24 and 48

Change from baseline in spine, hip, and femoral neck BMD T-Score was assessed at Week 24 and 48. T-score values \>= -1.0 were considered normal, T-score values \< -1.0 to -2.5 indicate osteopenia and T-score values \< -2.5 indicate osteoporosis.

Time frame: Baseline, Weeks 24 and 48

Percentage of Participants With Virologic Rebound (HIV-1 RNA >=20 Copies/mL) Cumulative Through Week 96

Virologic rebound was defined as: confirmed plasma HIV-1 RNA level \>=20 copies/mL up to and including Week 96, last available on-treatment (single) HIV-1 RNA \>=20 copies/mL at premature discontinuation (irrespective of reason), and last available on-treatment HIV-1 RNA \>=20 copies/mL at the study cutoff of Week 96 (that is, any last viral load \[re\]test having occurred no later than 6 weeks after Week 96). Percentage of participants with virologic rebound were reported.

Time frame: Through Week 96 (D/C/F/TAF arm) and from Week 52 to Week 96 (Switch to D/C/F/TAF arm)

Percentage of Participants With Virologic Rebound (HIV-1 RNA >=50 Copies/mL) Cumulative Through Week 96

Virologic rebound was defined as: confirmed plasma HIV-1 RNA level \>=50 copies/mL up to and including Week 96, last available on-treatment (single) HIV-1 RNA \>=50 copies/mL at premature discontinuation (irrespective of reason), and last available on-treatment HIV-1 RNA \>=50copies/mL at the study cutoff of Week 96 (that is, any last viral load \[re\]test having occurred no later than 6 weeks after Week 96). Percentage of participants with virologic rebound were reported.

Time frame: Through Week 96 (D/C/F/TAF arm) and from Week 52 to Week 96 (Switch to D/C/F/TAF arm)

Percentage of Participants With Virologic Rebound (HIV-1 RNA >=200 Copies/mL) Cumulative Through Week 96

Virologic rebound was defined as: confirmed plasma HIV-1 RNA level \>=200 copies/mL up to and including Week 96, last available on-treatment (single) HIV-1 RNA \>=200 copies/mL at premature discontinuation (irrespective of reason), and last available on-treatment HIV-1 RNA \>=200 copies/mL at the study cutoff of Week 96 (that is, any last viral load \[re\]test having occurred no later than 6 weeks after Week 96). Percentage of participants with virologic rebound were reported.

Time frame: Through Week 96 (D/C/F/TAF arm) and from Week 52 to Week 96 (Switch to D/C/F/TAF arm)

Percentage of Participants With Non-Virologic Rebound at Week 96 by Kaplan-Meier Estimates

Here Kaplan-Meier estimates percentage of participants with non-virologic rebound at Week 96.

Time frame: Baseline to Week 96 (D/C/F/TAF arm) and from Week 52 to Week 96 (Switch to D/C/F/TAF arm)

Percentage of Participants With Virologic Response Based on HIV-1 RNA <20, <50, and <200 Copies/mL Threshold at Week 96 as Defined by the FDA Snapshot Approach

Percentage of participants with virologic response based on HIV-1 RNA \<20, \<50, and \<200 copies/mL threshold were analyzed at Week 96 using FDA snapshot approach. FDA Snapshot approach analysis was based on the last observed viral load data: virologic response was defined as having last available HIV-1 RNA \<20/50/200 copies/mL (observed case).

Time frame: Week 96 (Comprising up to Week 96 for D/C/F/TAF and 44 weeks of D/C/F/TAF exposure [that is, from the switch to D/C/F/TAF at Week 52 up to Week 96])

Percentage of Participants With Virologic Response Based on HIV-1 RNA <20, <50, and <200 Copies/mL Threshold at Week 96 as Defined by the TLOVR Algorithm

Percentage of participants with virologic response based on HIV-1 RNA \<20, \<50, and \<200 copies/mL threshold were analyzed at Week 96 using TLOVR algorithm approach. TLOVR was defined as sustained HIV-1 RNA \<20/50/200 copies/mL.

Time frame: Week 96 (Comprising up to Week 96 for D/C/F/TAF and 44 weeks of D/C/F/TAF exposure [that is, from the switch to D/C/F/TAF at Week 52 up to Week 96])

Percentage of Participants With Virologic Failure Based on HIV-1 RNA >=20, >=50, and >=200 Copies/mL Threshold at Week 96 as Defined by the FDA Snapshot Approach

Percentage of participants with virologic failure based on HIV-1 RNA \>=20, \>=50, and \>=200 copies/mL threshold were analyzed at Week 96 using FDA snapshot approach. FDA Snapshot approach analysis was based on the last observed viral load data: virologic failure was defined by the FDA snapshot approach as having last available HIV-1 RNA \>=20/50/200 copies/mL at Week 96; virologic failure - leading to discontinuation; virologic failure - discontinued due to other reason and last available HIV-1 RNA \>=20/50/200 copies/mL.

Time frame: Week 96 (Comprising up to Week 96 for D/C/F/TAF and 44 weeks of D/C/F/TAF exposure [that is, from the switch to D/C/F/TAF at Week 52 up to Week 96])

Change From Reference in CD4+ Cell Count at Week 96

Change from reference in CD4+ cell count was assessed at Week 96. The change from reference in CD4+ count at a given time point is defined as: CD4+ at a given time point minus reference CD4+. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF (Comprising 44 weeks of D/C/F/TAF exposure [that is, from the switch to D/C/F/TAF at Week 52])

Number of Participants With Resistance to Study Drug Through Week 96

HIV-1 genotypes were analyzed from samples of participants with confirmed virologic rebound in case they had HIV-1 RNA values \>=400 copies/mL at failure or at later time points, including participants who discontinued with last HIV-1 RNA \>=400 copies/mL. Virologic rebound was defined as: confirmed plasma HIV-1 RNA level \>=20 copies/mL up to and including Week 96, last available on-treatment (single) HIV-1 RNA \>=20 copies/mL at premature discontinuation (irrespective of reason), and last available on-treatment HIV-1 RNA \>=20 copies/mL at the study cutoff of Week 96 (that is, any last viral load \[re\]test having occurred no later than 6 weeks after Week 96). Number of participants who developed resistance to any of the study drug (DRV, FTC, and TFV/TAF) were reported.

Time frame: Through Week 96 (D/C/F/TAF arm), up to Week 48 (Control arm) and from Week 52 to Week 96 (Switch to D/C/F/TAF arm)

Percentage of Participants With Treatment Adherence of >95 (Approach 1) Through Week 96

Treatment adherence (defined as adherence of \>95%) was assessed by the drug accountability cumulative through Week 96 (Approach 1).

Time frame: Through Week 96 (D/C/F/TAF arm) and from Week 52 to Week 96 (Switch to D/C/F/TAF arm)

Percentage of Participants With Treatment Adherence of >95% (Approach 2) Through Week 96

Treatment adherence (defined as adherence of \>95%) was assessed by the drug accountability cumulative treatment adherence up to time point where not more than one bottle was missing, or if available, through Week 96, whichever came sooner (Approach 2).

Time frame: Through Week 96 (D/C/F/TAF arm) and from Week 52 to Week 96 (Switch to D/C/F/TAF arm)

Percentage of Participants Experiencing Grade 3 and Grade 4 AEs, SAEs, and Premature Discontinuation Due to AEs Through Week 96

AE is any untoward medical occurrence in participant who received study drug without regard to possibility of causal relationship. Grade 3 (Severe) events were symptoms causing inability to perform usual social \& functional activities. Grade 4 (Life-threatening) events were symptoms causing inability to perform basic self-care functions or medical or operative intervention indicated to prevent permanent impairment, persistent disability, or death. SAE is any AE that results in: death, persistent or significant disability/incapacity, requires inpatient hospitalization or prolongation of existing hospitalization, is life-threatening experience, is a congenital anomaly/birth defect and may jeopardize participant and/or may require medical or surgical intervention to prevent one of the outcomes listed above.

Time frame: Through Week 96 (D/C/F/TAF arm) and from Week 52 to Week 96 (Switch to D/C/F/TAF arm)

Change From Reference in Serum Creatinine Levels at Week 96

Change from reference in serum creatinine levels at Week 96 was assessed. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Change From Reference in Estimated Glomerular Filtration Rate Based on Serum Creatinine (eGFRcr, by Cockcroft-Gault Formula [eGFRcg]) at Week 96

Change from reference in eGFRcr (by Cockcroft-Gault formula) was assessed at Week 96. eGFRcr according to the Cockcroft Gault formula- Male: (140 - age in years)\*(weight in kilogram \[kg\])/72\*(serum creatinine in milligram per deciliter \[mg/dL\])=eGFRcr (milliliter per minute \[mL/min\]); Female: (140 - age in years)\*(weight in kg)/72\*(serum creatinine in mg/dL)\*0.85=eGFRcr (mL/min). For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Change From Reference in Estimated Glomerular Filtration Rate Based on Serum Creatinine (by CKD-EPI) at Week 96

Change from reference in eGFRcr (by CKD-EPI) was assessed at Week 96. eGFRcr per CKD-EPI formula - Female: 1) Serum creatinine (Scr) less than or equal to (\<=)0.7 mg/dL: 144\*(Scr/0.7)\^-0.329\*0.993\^age; 2) Scr greater than (\>)0.7 mg/dL: 144\*(Scr/0.7)\^-1.209\*0.993\^age. Male: 1) Scr \<=0.9 mg/dL: 141\*(Scr/0.9)\^-0.411\*0.993\^age; 2) Scr \>0.9 mg/dL: 141\*(Scr/0.9)\^-1.209\*0.993\^age. . For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Change From Reference in Estimated Glomerular Filtration Rate Based on Serum Cystatin C (by CKD-EPI) at Week 96

Change from reference in eGFRcyst (by CKD-EPI) was assessed at Week 96. eGFRcyst according to the CKD-EPI formula - 1) Serum Cystatin C (Scyst) \<=0.8 mg/L: 133\*(Scyst/0.8)\^-0.499\*0.996\^age (\*0.932 if female); 2) Scyst \>0.8 mg/L: 133\*(Scyst/0.8)\^-1.328\*0.996\^age (\*0.932 if female). For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Change From Reference in UACR at Week 96

Change from reference in UACR was assessed at Week 96. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Change From Reference in URBPCR at Week 96

Change from reference in URBPCR was assessed at Week 96. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Change From Reference in UPCR at Week 96

Change from reference in UPCR was assessed at Week 96. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Change From Reference in UB2MGCR at Week 96

Change from reference in UB2MGCR was assessed at Week 96. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Percent Change From Reference in FEPO4 at Week 96

Percent change from reference in FEPO4 at Week 96 was reported. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ F/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Percent Change From Reference in Levels of Serum P1NP at Week 96

Percent change from reference in serum P1NP levels at Week 96 was reported. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ FTC/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Percent Change From Reference in Levels of Serum CTX at Week 96

Percent change from reference in serum CTX at Week 96 was reported. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ FTC/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Percent Change From Reference in Levels of PTH at Week 96

Percent change from reference in PTH at Week 96 was reported. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ FTC/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Percent Change From Reference in Levels of 25-OH Vitamin D at Week 96

Percent change from reference in 25-OH Vitamin D at Week 96 were reported. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ FTC/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Percent Change From Reference in Hip and Spine BMD at Week 96

The BMD is the amount of mineral in gram per square centimeter of bone, which was assessed by DXA scan. Positive values are "best values" and negative values are "worst values" of change. Percent change from reference in hip and spine BMD was assessed. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ FTC/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Change From Reference in BMD T-score of Hip and Spine at Week 96

BMD status was assessed using BMD T-scores; normal bone status was defined by a BMD T-score \>= -1, osteopenia by a T-score \>= -2.5 to \<-1.0, and osteoporosis by a T-score \<-2.5. For the D/C/F/TAF group, reference is the comparative treatment phase baseline as in Week 48 analysis (Reference 1). For the Switch to D/C/F/TAF (late switch) group, the last value prior to the switch was used as reference (reference 2).

Time frame: From Reference 1 to Week 96 for D/C/F/TAF+ FTC/TDF Group and Reference 2 to Week 96 for Switch to D/C/F/TAF

Percentage of Participants With Non-Virologic Rebound by Kaplan-Meier Estimates

Virologic rebound is defined as participants who show confirmed HIV-1 RNA \>=50 copies/mL, or for which the last available (single) HIV-1 RNA value on treatment was \>=50 copies/mL. Here, Kaplan-Meier estimates (%) of non-virologic rebound at every 6 months interval are presented.

Time frame: Week 96 to end of extension (at every 6 months, up to 42 months)

Percentage of Participants With Non-Treatment Failure by Kaplan-Meier Estimates

Percentage of participants with non-treatment failure by Kaplan-Meier Estimates were reported. Treatment failure was defined as having either protocol-defined virologic rebound or having discontinued for reasons other than alternate access to D/C/F/TAF (or other antiretroviral \[ARV\]).

Time frame: Week 96 to end of extension (up to 42 months)

Percentage of Participants With HIV RNA <50, <20, <200 Copies/mL Post Week 96 to End of Extension

Percentage of participants with HIV RNA \<50, \<20, \<200 copies/mL post Week 96 to end of extension were reported.

Time frame: Week 96 to end of extension (up to 42 months)

CD4+ Cell Count Post-Week 96 to End of Extension

The immunologic change was determined by Cluster of CD4+ cell count. CD4+ cell count post-Week 96 to end of extension were assessed.

Time frame: Week 96 to end of extension (up to 42 months)

Percentage of Participants With Treatment Adherence of >95% From Week 96 to End of Extension

Treatment adherence (defined as adherence of \>95%) was assessed by the drug accountability and was calculated cumulative from start of treatment/switch to last study drug intake by determination of the cumulative treatment adherence in participants who returned all dispensed bottles prior to or at the last visit in the study from Week 96 to end of extension.

Time frame: Week 96 to end of extension (up to 42 months)

Percentage of Participants Experiencing Grade 3 and 4 AEs, Serious Adverse Events (SAEs), and Premature Discontinuation Due to AEs Post-Week 96 to End of Extension

AE is any untoward medical occurrence in participant who received study drug without regard to possibility of causal relationship. Grade 3 (Severe) events were symptoms causing inability to perform usual social \& functional activities. Grade 4 (Life-threatening) events were symptoms causing inability to perform basic self-care functions or medical or operative intervention indicated to prevent permanent impairment, persistent disability, or death. SAE is any AE that results in: death, persistent or significant disability/incapacity, requires inpatient hospitalization or prolongation of existing hospitalization, is life-threatening experience, is a congenital anomaly/birth defect and may jeopardize participant and/or may require medical or surgical intervention to prevent one of the outcomes listed above.

Time frame: From Week 96 to end of extension (up to 42 months)