Mean reduction in serum HBV DNA determined by PCR assay (log10 copies/mL) at Week 24 adjusted for baseline HBV DNA and lamivudine resistance (LVDr) status, based on linear regression analysis.

Treated Subjects - As-Randomized, modified intention-to-treat (ITT) efficacy data set. Includes on-treatment data (obtained after the start of therapy and no more than 5 days after the last dose of study therapy) collected for treated subjects. Includes those participants with PCR measurements in the Week 24 analysis window.

Mean change from baseline in HBV DNA by PCR at Week 48, adjusted for baseline HBV DNA and LVDr Status.

Treated Subjects - As-Randomized, modified intention-to-treat (ITT) efficacy data set. Includes on-treatment data (obtained after the start of therapy and no more than 5 days after the last dose of study therapy) collected for treated subjects. Includes those participants with PCR measurements in the Week 48 analysis window.

Treated Subjects - As-Randomized population, responders only (non-completer=failure).

Treated Subjects - As-Randomized population, responders only (non-completer=failure).

Number of participants in each group who achieved ALT normalization (≤1.0 x upper limit of normal [ULN]) among those with baseline ALT >1.0 x ULN at Weeks 24 and 48

Treated Subjects - As-Randomized population, responders only (non-completer=failure).Participants in each group who achieved ALT normalization among those with baseline ALT >1.0 x ULN.

Treated Subjects - As-Randomized, modified intention-to-treat (ITT) efficacy data set (includes on-treatment data collected for treated subjects. On-treatment data are those obtained after the start of therapy and no more than 5 days after the last dose of study therapy.) n=number of participants with measurement at baseline and timepoint.

Child-Pugh classification assesses the prognosis of chronic liver disease by 5 clinical measures, scored 1-3 each (most severe derangement=3). Score range: 5 (best prognosis) to 15 (worst prognosis).

Treated Subjects-As-Randomized, modified intention-to-treat (ITT) efficacy data set (includes on-treatment data collected for treated subjects. On-treatment data are those obtained after start of therapy and <=5 days after the last dose of study therapy.) Non-completer=Failure. n=number of participants with measurement at baseline and timepoint.

Number of participants in each group with improvement or no worsening in Child-Pugh score from baseline to Week 48 as measured by improvement or no worsening in Child-Pugh score. Child-Pugh classification assesses the prognosis of chronic liver disease by 5 clinical measures, scored 1-3 each (most severe derangement=3). Score range: 5 (best prognosis) to 15 (worst prognosis).

Treated participants (as-randomized). Non-completer=Failure. The modified intention-to-treat (ITT) efficacy data set included on-treatment data collected for treated subjects. On-treatment data are those obtained after the start of therapy and no more than 5 days after the last dose of study therapy.

Mean change from baseline in Child-Pugh score through week 48. Child-Pugh classification assesses the prognosis of chronic liver disease by 5 clinical measures, scored 1-3 each (most severe derangement=3). Score range: 5 (best prognosis) to 15 (worst prognosis).

Treated Subjects - As-Randomized, modified intention-to-treat (ITT) efficacy data set (includes on-treatment data collected for treated subjects. On-treatment data are those obtained after the start of therapy and no more than 5 days after the last dose of study therapy.) n=number of participants with measurement at baseline and timepoint.

Number of Participants in each group with improvement in Child-Pugh score from baseline to Week 48 as measured by improvement in Child-Pugh class. Improvement in Child-Pugh Class is defined as change from B to A or C to A. Evaluable subjects are subjects with Child-Pugh Class B or C at Baseline. Child-Pugh classification assesses the prognosis of chronic liver disease by 5 clinical measures, scored 1-3 each (most severe derangement=3). Score range: 5 (best prognosis) to 15 (worst prognosis). Child-Pugh class A to C employs the added score from above: 5-6=Class A; 7-9=Class B; 10-15=Class C.

Treated participants (as-randomized). The modified intention-to-treat (ITT) efficacy data set included on-treatment data collected for treated subjects. On-treatment data are those obtained after the start of therapy and no more than 5 days after the last dose of study therapy.

Adjusted mean change from baseline in MELD score through Week 48 (adjusted for baseline value). The Model for End-Stage Liver Disease (MELD), is a scoring system for assessing the severity of chronic liver disease. MELD uses the patient's values for serum bilirubin, serum creatinine, and the international normalized ratio for prothrombin time (INR) to predict survival. In interpreting the MELD Score in hospitalized patients, the 3 month mortality is: 40 or more=100% mortality; 30-39=83% mortality; 20-29=76% mortality; 10-19=27% mortality; <10=4% mortality.

Treated participants - as-randomized populations; n=number of participants with assessment at baseline and timepoint. The modified intention-to-treat (ITT) efficacy data set included on-treatment data collected for treated subjects. On-treatment data are obtained after the start of therapy and <=5 days after the last dose of study therapy.

Participants with improvement or no worsening (any decrease or no change from baseline in score) in MELD score through Week 48. The Model for End-Stage Liver Disease (MELD), is a scoring system for assessing the severity of chronic liver disease. MELD uses the patient's values for serum bilirubin, serum creatinine, and the international normalized ratio for prothrombin time (INR) to predict survival. In interpreting the MELD Score in hospitalized patients, the 3 month mortality is: 40 or more=100% mortality; 30-39=83% mortality; 20-29=76% mortality; 10-19=27% mortality; <10=4% mortality.

Treated Subjects - As-Randomized, modified intention-to-treat (ITT) efficacy data set (includes on-treatment data collected for treated subjects. On-treatment data are those obtained after the start of therapy and no more than 5 days after the last dose of study therapy.) n=number of participants with measurement at baseline and timepoint.

Scoring for the SF-36 will be done using the algorithm developed by the Research ANd Development(RAND) Corporation (a scale of 0-100). Higher scores represent better quality of life. Coding for items with 2-category responses=0 and 100; 3-category=0/50/100; 5-category=0/25/50/75/100; 6-category=0/20/40/60/80/100. Scores of items in the same scale are combined to create the 8 scale scores (physical functioning, role-physical, bodily-pain, general health, vitality, social functioning, role-emotional, mental health). Physical and mental health composite scores will be computed for the group.

This endpoint was not analyzed due to lack of complete data at 48 Weeks, but will be assessed at future time points.

The EQ-5D has 5 attributes (mobility, self-care, usual activity, pain/discomfort, and anxiety/depression), each with 3 levels (no problem, some problems, and major problems). This algorithm gives valuation (weights) to each of the 15 responses on the form. Each valuation is a negative number, subtracted from the maximum score of 1 (perfect well being). The overall health index score ranges from 0 (dead) to 1 (perfect health) value scale, and the visual analog scale ranges from 0 to 100. Item weights will be obtained from the EuroQol group.

This endpoint was not analyzed due to lack of complete data at 48 Weeks, but will be assessed at future time points.

Mean albumin levels, and mean change from baseline in albumin, a measure of synthetic liver function. Normal range for albumin = 3.5 - 5.3 g/dL.

Treated participants - as randomized; n=number of participants with value at baseline and given timepoint.

Mean prothrombin time, and mean change from baseline in prothrombin time, a measure of synthetic liver function. Prothrombin time is the time it takes (in seconds) for a sample of blood to clot. Normal range for prothrombin time (PT) = 10-13 seconds.

Treated, as-randomized. Subjects with normal values at baseline were excluded from the analysis. n=number of participants with value at baseline and given timepoint.

Mean total bilirubin levels, and mean change from baseline in total bilirubin, a measure of liver secretory function.Normal range for total bilirubin = 0.2 - 1.2 mg/dL.

Treated, as-randomized. Subjects with normal values at baseline were excluded from the analysis. n=number of participants with value at baseline and given timepoint.

Mean baseline platelet count and mean change from baseline in platelet count at specific timepoints. Platelets are the smallest particles found in the blood, which play a major role in forming blood clots. Normal range for platelets = 140 - 450 X 10*9 c/L.

Treated, as-randomized. Subjects with normal values at baseline were excluded from the analysis. n=number of participants with value at baseline and given timepoint.

Number of participants who achieved normalization of albumin (>= 1 x lower limit of normal [LLN]), a measure of liver function, at specific timepoints.

Treated subjects (as randomized). Excludes subjects with normal albumin at Baseline. Non-completer = failure.

Number of participants who achieved normalization of prothrombin time (<= 1 x ULN), a measure of liver function, at specific timepoints.

Treated subjects - as-randomized. Excludes participants with normal prothrombin time at baseline. Non-completer = failure.

Number of participants who achieved normalization of total bilirubin (<= 1 x ULN), a measure of liver function, at specific timepoints.

Treated subjects - as-randomized. Excludes participants with normal prothrombin time at baseline. Non-completer = failure.

Number of participants who achieved normalization of platelet count (>= 1 x lower limit of normal [LLN]), a measure of liver function, at specific timepoints.

Treated subjects - as-randomized. Excludes participants with normal prothrombin time at baseline. Non-completer = failure.

HCC-free survival was analyzed using life tables. Measured values show the number of HCC events among treated participants at given time points.

Treated, through Week 48 - (analyzed as-treated). (Week 48 on-treatment safety data contain all on-treatment data up to study Day 336, if the subject is still on treatment. If the subject discontinued before study Day 336, then all data up to 5 days after the discontinuation date were included.) n=number of participants at risk at each timepoint.

AE=any new untoward medical occurrence/worsening of a pre-existing medical condition regardless of causal relationship. SAE=any untoward medical occurrence at any dose that: results in death; is life-threatening; requires/prolongs inpatient hospitalization; results in persistent/significant disability; is cancer; is congenital anomaly/birth defect; results in drug dependency/abuse; is an important medical event. Grades:1=Mild, 2=Moderate, 3=Severe, 4=Life-threatening/disabling, 5=Death. Confirmed increase in serum creatinine=values ≥0.5 mg/dL compared with baseline on 2 sequential measures.

As-treated population (all randomized subjects treated with at least 1 dose of study therapy, ETV or ADV, based on actual treatment received). Note that 5 additional enrolled participants died prior to initiation of treatment and are not included in this table.

Grade 3/4 laboratory abnormalities (hematology, electrolyte, lipase, liver function, metabolic, renal function, urinalysis). The Week 48 data set was used to evaluate the Week-48 on-treatment safety. The cumulative data set was used to evaluate the safety while on treatment. Common Terminology Criteria for Adverse Events v3.0 (CTCAE) Grades:1=Mild, 2=Moderate, 3=Severe, 4=Life-threatening/disabling, 5=Death.

As-treated population (all randomized subjects treated with at least 1 dose of study therapy, ETV or ADV, based on actual treatment received).

ALT flare=ALT > 2 x baseline and > 10 x upper limit of normal (ULN) by clinical laboratory evaluation. Table includes number of participants with selected clinical events and/or laboratory abnormalities during ALT flares. Selected clinical events during ALT flares=ascites, hepatic encephalopathy, jaundice, bacterial peritonitis. Selected Laboratory abnormalities during ALT flares=international normalized ratio > 1.5 or prothrombin time >= 1.2 x ULN and total bilirubin >2.5 mg/dL and > 1 mg/dL increase from baseline.

Treated participants - as treated. The on-treatment safety data set contains data from all randomized subjects treated with at least 1 dose of study therapy, ETV or ADV. Treatment group for safety data set is based on actual treatment received.

Data includes type of malignant neoplasm.

The on-treatment safety data set contains data from all randomized subjects treated with at least 1 dose of study therapy, ETV or ADV. Treatment group for safety data set is based on actual treatment received.

The on-treatment safety data set contains data from all randomized subjects treated with at least 1 dose of study therapy, ETV or ADV. Treatment group for safety data set is based on actual treatment received.