Percentage of participants with plasma human immunodeficiency virus type 1(HIV-1) ribonucleic acid (RNA) <50 copies per milliliter (c/mL) were assessed at Week 48 using the Snapshot algorithm. Analysis was performed using a stratified analysis with Cochran-Mantel-Haenszel (CMH) weights, adjusting for Baseline plasma HIV-1 RNA ( =<vs. >100,000 c/mL) and CD4+ cell count (=<350 cells per millimeter cube (cells/mm^3) or >350 cells/mm^3). Intent-to-Treat Exposed (ITT-E) Population comprised of all randomized participants who received at least one dose of study medication. Percentage values are rounded off.

ITT-E Population

Percentage of participants with plasma HIV-1 RNA <50 and <400 c/mL were assessed at Baseline, Weeks 4, 12, 24 , 36 and 48 using the Snapshot algorithm (Missing, Switch or Discontinuation = Failure). The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Percentage values are rounded off.

ITT-E Population

Plasma samples were collected for quantitative analysis of HIV-1 RNA. Percentage of participants with plasma HIV-1 RNA <50 c/mL were reported. Percentage values are rounded off.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Change from the Baseline in plasma HIV-1 RNA were assessed at indicated time points. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Change from the Baseline in plasma HIV-1 RNA were assessed at indicated time points. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Absolute Values in plasma HIV-1 RNA were assessed at indicated time points. The Baseline value was defined as the latest pre-dose assessment (Day 1) value.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Absolute Values in plasma HIV-1 RNA were assessed at indicated time points.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Change from Baseline in cluster of differentiation 4 (CD4+) cell count were assessed at indicated time points. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Change from Baseline in cluster of differentiation 4(CD4+) cell count were assessed at indicated time points. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Absolute values in CD4+ cell count were assessed at indicated time points. The Baseline value was defined as the latest pre-dose assessment (Day 1) value.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Absolute values in CD4+ cell count were assessed at indicated time points.

ITT-E Population. Only those participants with data available at indicated time points were analyzed (represented by n=X in category titles)

Clinical chemistry parameters were assessed at Baseline (Day 1), Weeks 4, 12, 24, 36 and 48. Change from Baseline in carbon dioxide, electrolytes (chloride, hyperkalemia, hypernatremia, hypokalemia, hyponatremia, phosphate, potassium, sodium), lipids (cholesterol [CHLS], high density lipoprotein [HDL] CHLS direct, low density lipoprotein (LDL) CHLS calculation, LDL CHLS direct, triglycerides), glucose (hyperglycaemia, hypoglycaemia) and urea are summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value. Laboratory parameters were assessed in Safety Population which comprised of all participants who received at least one dose of study treatment.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Clinical chemistry parameters were assessed at Baseline (Day 1), Weeks 4, 12, 24, 36 and 48. Change from Baseline in bilirubin and creatinine are summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Clinical chemistry parameters were assessed at Baseline (Day 1), Week 4, 12, 24, 36 and Week 48. Change from Baseline in albumin is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Clinical chemistry parameters were assessed at Baseline (Day 1), Week 4, 12, 24, 36 and Week 48. Change from Baseline in alanine aminotransferase, alkaline phosphatase, aspartate aminotransferase, creatine kinase is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population.Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Clinical chemistry parameters were assessed at Baseline (Day 1), Week 4, 12, 24, 36 and Week 48. Change from Baseline in creatinine clearance is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Clinical chemistry parameters were assessed at Baseline (Day 1), Week 4, 12, 24, 36 and Week 48. Change from Baseline in lipase is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Clinical chemistry parameters were assessed at Baseline (Day 1), Week 4, 12, 24, 36 and Week 48. Change from Baseline in Total CHLS/HDL CHLS ratio is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Hematology parameters were assessed at Baseline (Day 1), Week 4, 12, 24, 36 and Week 48. Change from Baseline in basophils, eosinophils, lymphocytes, monocytes is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Hematology parameters were assessed at Baseline (Day 1), Week 4, 12, 24, 36 and Week 48. Change from Baseline in erythrocytes is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Hematology parameters were assessed at Baseline (Day 1), Weeks 4, 12, 24, 36 and 48. Change from Baseline in hematocrit is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Hematology parameters were assessed at Baseline (Day 1), Week 4, 12, 24, 36 and Week 48. Change from Baseline in erythrocyte mean corpuscular volume (EMCV) is summarized. Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Change from Baseline in mean triglycerides is summarized at Week 48. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value. Adjusted mean is the estimated mean change from Baseline in fasted triglycerides at Week 48 in each arm calculated from a model adjusted for the following covariates: treatment, Baseline plasma HIV-1 RNA, Baseline CD4+ cell count, age and triglycerides at Baseline. Participants on lipid lowering therapy at Baseline were excluded from analysis. Measurements collected after a participant initiates lipid lowering therapy were set to missing. Missing values were imputed using multiple imputation under a multivariate normal model adjusting for Baseline plasma HIV-1 RNA, Baseline CD4+ cell count, fasted triglycerides and TC/HDL ratio at Baseline, Week 12 and Week 36.

Safety Population. Participants on lipid lowering therapy at Baseline were excluded from analysis. Only those participants with data available at specified time points were analyzed.

Change from Baseline in mean total cholesterol (TC)/HDL ratio is summarized at Week 48. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value. Adjusted mean is the estimated mean change from Baseline in fasted TC/HDL at Week 48 in each arm calculated from a model adjusted for the following covariates: treatment, Baseline plasma HIV-1 RNA, Baseline CD4+ cell count, age and triglycerides/HDL at Baseline. Participants on lipid lowering therapy at Baseline were excluded from analysis. Measurements collected after a participant initiates lipid lowering therapy were set to missing. Missing values were imputed using multiple imputation under a multivariate normal model adjusting for Baseline plasma HIV-1 RNA, Baseline CD4+ cell count, fasted triglycerides and TC/HDL ratio at Baseline, Week 12 and Week 36.

Safety Population. Participants on lipid lowering therapy at Baseline were excluded from analysis. Only those participants with data available at specified time points were analyzed.

Change from Baseline in urine albumin creatinine ratio at Week 24 and Week 48 is summarized. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Number of participants with Grade 1-4 AEs by maximum toxicity were assessed from the start of study treatment and until end of the Randomization phase. AEs are categorized into following grades as per The Division of Aqcuired Immuno Deficiency Syndrome (AIDS) Table for Grading the Severity of Adult and Pediatric Adverse Events (DAIDS AE Grading Table)- Grade 1- mild, Grade 2- moderate; Grade 3- severe and Grade 4- potentially life-threatening. Higher the grade, more severe the symptoms.

Safety Population

Number of participants with Grade 1-4 AEs were assessed in Continuation Phase. AEs are categorized into following grades as per The Division of Aqcuired Immuno Deficiency Syndrome (AIDS) Table for Grading the Severity of Adult and Pediatric Adverse Events (DAIDS AE Grading Table)- Grade 1- mild, Grade 2- moderate; Grade 3- severe and Grade 4- potentially life-threatening. Higher the grade, more severe the symptoms.

Safety - Continuation Phase Population comprised of all participants in the DTG/ABC/3TC group who received at least 1 dose of study treatment after entering the Continuation Phase

An AE is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a medicinal product. An SAE is any untoward medical occurrence that, at any dose results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or is a congenital anomaly/birth defect or other events that may jeopardize the participant or may require medical or surgical intervention to prevent one of the outcome listed above, liver injury and impaired liver function and grade 4 laboratory abnormalities. Number of participants with any AEs, and SAEs have been presented.

Safety Population

An AE is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a medicinal product. An SAE is any untoward medical occurrence that, at any dose results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or is a congenital anomaly/birth defect or other events that may jeopardize the participant or may require medical or surgical intervention to prevent one of the outcome listed above, liver injury and impaired liver function and grade 4 laboratory abnormalities. Number of participants with any AEs, and SAEs have been presented.

Safety-Continuation Phase Population

Number of participants with Grade 1-4 emergent chemistry toxicities were assessed from the start of study treatment and end of Randomized Phase. Chemistry toxicities were categorized into following grades as per The Division of AIDS Table for Grading the Severity of Adult and Pediatric Adverse Events (DAIDS AE Grading Table)- Grade 1- mild, Grade 2- moderate; Grade 3- severe and Grade 4- potentially life-threatening. Higher the grade, more severe the symptoms. Data has been reported for clinical chemistry parameters including hyperglycaemia, hyperkalemia, hypernatremia, hypoglycaemia, hypokalemia, hyponatremia, alanine aminotransferase, albumin, alkaline phosphatase, aspartate aminotransferase, bilirubin, carbon dioxide, cholesterol, creatine kinase, creatinine, LDL cholesterol calculation, LDL cholesterol direct, lipase, phosphate, potassium, sodium, triglycerides and glucose.

Safety Population

Number of participants with grades 1-4 emergent chemistry toxicities were assessed in Continuation Phase. Chemistry toxicities were categorized into following grades as per The Division of AIDS Table for Grading the Severity of Adult and Pediatric Adverse Events (DAIDS AE Grading Table)- Grade 1- mild, Grade 2- moderate; Grade 3- severe and Grade 4- potentially life-threatening. Higher the grade, more severe the symptoms. Data has been reported for clinical chemistry parameters including hyperglycaemia, hypernatremia, hypoglycaemia, hypokalemia, hyponatremia, alanine aminotransferase, albumin, alkaline phosphatase, aspartate aminotransferase, bilirubin, carbon dioxide, cholesterol, creatine kinase, creatinine, LDL cholesterol calculation, LDL cholesterol direct, lipase, phosphate, potassium, sodium, triglycerides and glucose.

Safety - Continuation Phase Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Number of participants with Grade 1-4 emergent hematology toxicities were assessed from the start of study treatment and end of Randomized Phase. Hematology toxicities were categorized into following grades as per The Division of AIDS Table for Grading the Severity of Adult and Pediatric Adverse Events (DAIDS AE Grading Table)- Grade 1- mild, Grade 2- moderate; Grade 3- severe and Grade 4- potentially life-threatening. Higher the grade, more severe the symptoms. Data has been reported for clinical chemistry parameters including hemoglobin, leukocytes, neutrophils and platelets.

Safety Population

Number of participants with Grade 1-4 emergent hematology toxicities were assessed in Continuation Phase. Hematology toxicities were categorized into following grades as per The Division of AIDS Table for Grading the Severity of Adult and Pediatric Adverse Events (DAIDS AE Grading Table)- Grade 1- mild, Grade 2- moderate; Grade 3- severe and Grade 4- potentially life-threatening. Higher the grade, more severe the symptoms. Data has been reported for clinical chemistry parameters including hemoglobin, leukocytes, neutrophils and platelets.

Safety - Continuation Phase Population. Only those participants with data available at specified time points were analyzed.

An AE is defined as any untoward medical occurrence in a participant temporally associated with the use of a medicinal product (MP), whether or not considered related to the MP. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of an MP. An SAE is defined as any untoward medical occurrence that, at any dose, results in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect, is an important medical event that jeopardizes the participant or may require medical or surgical intervention to prevent one of the other outcomes listed in the above definition, or is associated with liver injury and impaired liver function.

Safety Population

An AE is defined as any untoward medical occurrence in a participant temporally associated with the use of a medicinal product (MP), whether or not considered related to the MP. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of an MP. An SAE is defined as any untoward medical occurrence that, at any dose, results in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect, is an important medical event that jeopardizes the participant or may require medical or surgical intervention to prevent one of the other outcomes listed in the above definition, or is associated with liver injury and impaired liver function.

Safety - Continuation Phase Population

Bone markers were assessed at Baseline (Day 1), Weeks 24, 48. Change from Baseline in bone specific alkaline phosphatase (BSAP), osteocalcin and procollagen 1 N-terminal propeptide (PTP) is summarized. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Bone markers were assessed at Baseline (Day 1), Weeks 24, 48. Change from Baseline in Type I collagen C-telopeptides (T-1 CCT) is summarized. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Bone markers were assessed at Baseline (Day 1), Weeks 24, 48. Change from Baseline in vitamin D, vitamin D2 and vitamin D3 is summarized. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Bone markers were assessed at indicated timepoints. Bone specific alkaline phosphatase (BSAP), osteocalcin and procollagen 1 N-terminal propeptide (PTP), Type 1 Collagen C-Telopeptide, vitamin D ratio of Week 48 results over Baseline is calculated. Bone biomarkers were analyzed based on log transformed data. Estimates of adjusted mean and difference were calculated from an Analysis of covariance (ANCOVA) model adjusting for age, baseline viral load Baseline CD4+ cell count, Baseline biomarker level, body mass index category, smoking status and baseline Vitamin D use. Adjusted mean of log-transformed change from Baseline are transformed back to Week 48/Baseline ratio for each treatment group. Adjusted difference of log-transformed change from Baseline between treatment groups is transformed back to the ratio of Week 48/Baseline ratio in DTG/ABC/3TC FDC to ATV+RTV+TDF/FTC FDC.

Safety Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

The 12-Item Short Form Health Survey (SF-12) is 12 item abbreviated form of SF-36 survey. SF-12 questions make up 8 scales: Physical Functioning, Role Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role Emotional, Mental Health. SF-12 is a self-reported outcome measure assessing psychological wellness and the impact of health on an individual's everyday life. SF-12 total score ranges from 20 to 60 and higher score indicate a higher level of functioning. SF-12 total score was calculated by a clinician scoring 12-question survey filled by participants. Transformed physical component summary score (PCS) and transformed mental component summary score (MCS) are derived using the sum of all 12 items and scored onto a 0-100 scale such that a higher score indicates a better health state and better functioning. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Change from Baseline was calculated as post-dose visit value minus Baseline value.

ITT-E Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

The HIV treatment satisfaction questionnaire (HIVTSQ) is a 10-item self-reported scale that measures overall satisfaction with treatment and by specific domains e.g. convenience, flexibility. The HIVTSQ items are summed up to produce a treatment satisfaction total score (0 to 60) and an individual satisfaction rating for each item (0 to 6) and two subscales: general satisfaction/clinical and lifestyle/ease subscales. The higher the score, the greater the improvement in treatment satisfaction as compared to the past few weeks. A smaller score represents a decline in treatment satisfaction compared to the past few weeks. Statistical analysis was performed based on Wilcoxon rank sum test.

ITT-E Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Percentage of participants with plasma HIV-1 RNA <50 copies/mL at Week 48 by subgroups (age, race, country, Baseline plasma HIV-1 RNA [BPHR], Baseline CD4+ cell count [BCCC], Baseline Centers for Disease Control and Prevention [CDC] category and HIV-1 subtype) were assessed using the Snapshot algorithm (Missing, Switch or Discontinuation = Failure). Analysis was performed using a stratified analysis with CMH weights, adjusting for Baseline plasma HIV-1 RNA ( =<versus [vs]. >100,000 c/mL) and CD4+ cell count (=<350 cells/mm^3 or >350 cells/mm^3). Different participants may have been analyzed at different time points, so the overall number of participants analyzed reflects everyone in the ITT population. Percentage values are rounded off.

ITT-E Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Number of participants with post-Baseline HIV-1disease progression were assessed during study period. The CDC Classification System for HIV Infection is the medical classification system used by the United States Centers for Disease Control and Prevention (CDC) to classify HIV disease and infection. The clinical categories of HIV infection are defined as follows: Category A: Mildly symptomatic, Category B: Moderately symptomatic, Category C: Severely symptomatic. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Only those participants available at the specified time points were analyzed. Different participants may have been analyzed at different time points, so the overall number of participants analyzed reflects everyone in the ITT population.

ITT-E Population, only those participants who experienced a disease progression to CDC Class C or death were analyzed.

Number of participants with post-Baseline HIV-1disease progression were assessed during study period. The CDC Classification System for HIV Infection is the medical classification system used by the United States Centers for Disease Control and Prevention (CDC) to classify HIV disease and infection. The clinical categories of HIV infection are defined as follows: Category A: Mildly symptomatic, Category B: Moderately symptomatic, Category C: Severely symptomatic. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. Only those participants available at the specified time points were analyzed. Different participants may have been analyzed at different time points, so the overall number of participants analyzed reflects everyone in the ITT population.

ITT-E Population, only those participants who experienced a disease progression to CDC Class C or death were analyzed

Number of participants, who meet confirmed virologic withdrawal criteria, with treatment emergent genotypic resistance to integrase strand transfer inhibitor (INSTI), Non-nucleoside reverse transcriptase inhibitor (NNRTI), nucleoside reverse transcriptase inhibitor (NRTI), protease inhibitors (PI) will be summarized. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. On-treatment Genotypic Resistance Population comprised of all participants in the ITTE population with available On-treatment genotypic resistance data at the time confirmed virologic withdrawal criterion was met.

On-treatment Genotypic Resistance Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)

Number of participants, who meet confirmed virologic withdrawal criteria, with treatment emergent genotypic resistance to integrase strand transfer inhibitor (INSTI), Non-nucleoside reverse transcriptase inhibitor (NNRTI), nucleoside reverse transcriptase inhibitor (NRTI), protease inhibitors (PI) will be summarized. The Baseline value was defined as the latest pre-dose assessment (Day 1) value. On-treatment Genotypic Resistance Population comprised of all participants in the ITTE population with available On-treatment genotypic resistance data at the time confirmed virologic withdrawal criterion was met.

On-treatment Genotypic Resistance Population. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles)