A Proof-of-Concept Study of Faricimab (RO6867461) in Participants With Choroidal Neovascularization (CNV) Secondary to Age-Related Macular Degeneration (AMD)

Percentage of Participants Gaining Greater Than or Equal to (≥) 15 Letters From Baseline in BCVA Letter Score at Week 36, in Treatment-Naive Participants

Best corrected visual acuity (BCVA) at a starting test distance of 4 meters was measured using a set of three Precision VisionTM or Lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified visual acuity examiner masked to study drug arm assignment. The BCVA examiner was masked to study eye and treatment assignment and only performed the refraction and BCVA assessment, but was not allowed to perform any other tasks involving direct care. The BCVA examiner was also masked to the BCVA letter scores of a participant's previous visits and could only know the participant's refraction data from previous visits. The BCVA letter score ranges from 0 to 100 (best score attainable), and a gain in BCVA letter score from baseline indicates an improvement in visual acuity. The outcome measure was analyzed using a Generalized Estimating Equations Model. Missing values were not imputed; it was assumed that the data were missing at random.

Time frame: Baseline, Week 36

Percentage of Participants Gaining ≥15 Letters From Week 12 in BCVA Letter Score at Week 36, in Anti-VEGF Incomplete Responders

Best corrected visual acuity (BCVA) at a starting test distance of 4 meters was measured using a set of three Precision VisionTM or Lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified visual acuity examiner masked to study drug arm assignment. The BCVA examiner was masked to study eye and treatment assignment and only performed the refraction and BCVA assessment, but was not allowed to perform any other tasks involving direct care. The BCVA examiner was also masked to the BCVA letter scores of a participant's previous visits and could only know the participant's refraction data from previous visits. The BCVA letter score ranges from 0 to 100 (best score attainable), and a gain in BCVA letter score from baseline indicates an improvement in visual acuity. Missing values were not imputed; it was assumed that the data were missing at random.

Time frame: Weeks 12 and 36

Percentage of Participants With BCVA Snellen Equivalent of 20/40 or Better at Week 36, in Treatment-Naive Participants

Best corrected visual acuity (BCVA) at a starting test distance of 4 meters was measured using a set of three Precision VisionTM or Lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified visual acuity examiner masked to study drug arm assignment. The BCVA examiner was masked to study eye and treatment assignment and only performed the refraction and BCVA assessment, but was not allowed to perform any other tasks involving direct care. The BCVA examiner was also masked to the BCVA letter scores of a participant's previous visits and could only know the participant's refraction data from previous visits. The BCVA letter score ranges from 0 to 100 (best score attainable), and a gain in BCVA letter score from baseline indicates an improvement in visual acuity. The outcome measure was analyzed using a Generalized Estimating Equations Model. Missing values were not imputed; it was assumed that the data were missing at random.

Time frame: Week 36

Percentage of Participants With BCVA Snellen Equivalent of 20/40 or Better at Week 36, in Anti-VEGF Incomplete Responders

Best corrected visual acuity (BCVA) at a starting test distance of 4 meters was measured using a set of three Precision VisionTM or Lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified visual acuity examiner masked to study drug arm assignment. The BCVA examiner was masked to study eye and treatment assignment and only performed the refraction and BCVA assessment, but was not allowed to perform any other tasks involving direct care. The BCVA examiner was also masked to the BCVA letter scores of a participant's previous visits and could only know the participant's refraction data from previous visits. The BCVA letter score ranges from 0 to 100 (best score attainable), and a gain in BCVA letter score from baseline indicates an improvement in visual acuity. Missing values were not imputed; it was assumed that the data were missing at random.

Time frame: Week 36

Percentage of Participants With BCVA Snellen Equivalent of 20/200 or Worse at Week 36, in Treatment-Naive Participants

Best corrected visual acuity (BCVA) at a starting test distance of 4 meters was measured using a set of three Precision VisionTM or Lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified visual acuity examiner masked to study drug arm assignment. The BCVA examiner was masked to study eye and treatment assignment and only performed the refraction and BCVA assessment, but was not allowed to perform any other tasks involving direct care. The BCVA examiner was also masked to the BCVA letter scores of a participant's previous visits and could only know the participant's refraction data from previous visits. The BCVA letter score ranges from 0 to 100 (best score attainable), and a gain in BCVA letter score from baseline indicates an improvement in visual acuity. The outcome measure was analyzed using a Generalized Estimating Equations Model. Missing values were not imputed; it was assumed that the data were missing at random.

Time frame: Week 36

Percentage of Participants With BCVA Snellen Equivalent of 20/200 or Worse at Week 36, in Anti-VEGF Incomplete Responders

Best corrected visual acuity (BCVA) at a starting test distance of 4 meters was measured using a set of three Precision VisionTM or Lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified visual acuity examiner masked to study drug arm assignment. The BCVA examiner was masked to study eye and treatment assignment and only performed the refraction and BCVA assessment, but was not allowed to perform any other tasks involving direct care. The BCVA examiner was also masked to the BCVA letter scores of a participant's previous visits and could only know the participant's refraction data from previous visits. The BCVA letter score ranges from 0 to 100 (best score attainable), and a gain in BCVA letter score from baseline indicates an improvement in visual acuity. Missing values were not imputed; it was assumed that the data were missing at random.

Time frame: Week 36

Mean Change From Baseline in Foveal Center Point Thickness at Week 36, as Measured by Spectral Domain Optical Coherence Tomography (SD-OCT), in Treatment-Naive Participants

Foveal center point thickness (FCPT) is defined as the thickness from the inner limiting membrane to the retinal pigment epithelial at the horizontal slice closest to the center of the fovea. Foveal center point thickness was measured using spectral domain optical coherence tomography (SD-OCT). Anatomic outcome measures were based on results from a central reading center. This analysis used a Mixed Effects Model for Repeated Measurements (MMRM). Missing data were implicitly imputed by the MMRM, assuming a missing-at-random mechanism.

Time frame: Baseline, Week 36

Mean Change From Week 12 in Foveal Center Point Thickness at Week 36, as Measured by SD-OCT, in Anti-VEGF Incomplete Responders

Foveal center point thickness (FCPT) is defined as the thickness from the inner limiting membrane to the retinal pigment epithelial at the horizontal slice closest to the center of the fovea. Foveal center point thickness was measured using spectral domain optical coherence tomography (SD-OCT). Anatomic outcome measures were based on results from a central reading center. This analysis used a Mixed Effects Model for Repeated Measurements (MMRM). Missing data were implicitly imputed by the MMRM, assuming a missing-at-random mechanism.

Time frame: Weeks 12 and 36

Mean Change From Baseline in Central Subfield Thickness at Week 36, as Measured by SD-OCT, in Treatment-Naive Participants

Central subfield thickness (CST) is defined as the mean thickness from the inner limiting membrane to the retinal pigment epithelial over the 1 millimetre (mm) central subfield. Central subfield thickness was measured using spectral domain optical coherence tomography (SD-OCT). Anatomic outcome measures were based on results from a central reading center. This analysis used a Mixed Effects Model for Repeated Measurements (MMRM). Missing data were implicitly imputed by the MMRM, assuming a missing-at-random mechanism.

Time frame: Baseline, Week 36

Mean Change From Week 12 in Central Subfield Thickness at Week 36, as Measured by SD-OCT in Anti-VEGF Incomplete Responders

Central subfield thickness (CST) is defined as the mean thickness from the inner limiting membrane to the retinal pigment epithelial over the 1 millimetre (mm) central subfield. Central subfield thickness was measured using spectral domain optical coherence tomography (SD-OCT). Anatomic outcome measures were based on results from a central reading center. This analysis used a Mixed Effects Model for Repeated Measurements (MMRM). Missing data were implicitly imputed by the MMRM, assuming a missing-at-random mechanism.

Time frame: Weeks 12 and 36

Number of Participants With Resolution of Dry Retina at Week 36, Defined as Absence of Cysts, Intraretinal Fluid, Pigment Epithelial Detachment, or Subretinal Fluid as Measured by SD-OCT, in Treatment-Naive Participants

The presence of cysts, intraretinal fluid, pigment epithelial detachment, or subretinal fluid, as per the study's dry retina definition, were evaluated as individual dry retina outcomes. Cysts were defined as the presence of cystoid space (fluid) in the retina. Intraretinal fluid was defined as the presence of fluid within the retina. Pigment epithelial detachment was defined as the presence of a detachment of the pigment epithelium from the Bruch's membrane. Subretinal fluid was defined as the presence of fluid between the retina and the retinal pigment epithelium. All parameters were measured using spectral domain optical coherence tomography (SD-OCT). Anatomic outcome measures were based on results from a central reading center.

Time frame: Baseline, Week 36

Number of Participants With Resolution of Dry Retina at Week 36, Defined as Absence of Cysts, Intraretinal Fluid, Pigment Epithelial Detachment, or Subretinal Fluid as Measured by SD-OCT, in Anti-VEGF Incomplete Responders

The presence of cysts, intraretinal fluid, pigment epithelial detachment, or subretinal fluid, as per the study's dry retina definition, were evaluated as individual dry retina outcomes. Cysts were defined as the presence of cystoid space (fluid) in the retina. Intraretinal fluid was defined as the presence of fluid within the retina. Pigment epithelial detachment was defined as the presence of a detachment of the pigment epithelium from the Bruch's membrane. Subretinal fluid was defined as the presence of fluid between the retina and the retinal pigment epithelium. All parameters were measured using spectral domain optical coherence tomography (SD-OCT). Anatomic outcome measures were based on results from a central reading center.

Time frame: Weeks 12 and 36

Mean Change From Baseline in Total Area of Choroidal Neovascularization (CNV) at Week 36, as Measured by Fundus Fluorescein Angiography (FFA), in Treatment-Naive Participants

The total area of choroidal neovascularization (CNV) was evaluated by a central reading center using fundus fluorescein angiography (FFA). This analysis used a Mixed Effects Model for Repeated Measurements (MMRM). Missing data were implicitly imputed by the MMRM, assuming a missing-at-random mechanism.

Time frame: Baseline, Week 36

Mean Change From Week 12 in Total Area of Choroidal Neovascularization (CNV) at Week 36, as Measured by FFA, in Anti-VEGF Incomplete Responders

The total area of choroidal neovascularization (CNV) was evaluated by a central reading center using fundus fluorescein angiography (FFA).

Time frame: Weeks 12 and 36

Mean Change From Baseline in Total Area of Choroidal Neovascularization (CNV) Component at Week 36, as Measured by FFA, in Treatment-Naive Participants

The total area of choroidal neovascularization (CNV) component (i.e., total area of CNV membrane) was evaluated by a central reading center using fundus fluorescein angiography (FFA). This analysis used a Mixed Effects Model for Repeated Measurements (MMRM). Missing data were implicitly imputed by the MMRM, assuming a missing-at-random mechanism.

Time frame: Baseline, Week 36

Mean Change From Week 12 in Total Area of Choroidal Neovascularization (CNV) Component at Week 36, as Measured by FFA, in Anti-VEGF Incomplete Responders

The total area of choroidal neovascularization (CNV) component (i.e., total area of CNV membrane) was evaluated by a central reading center using fundus fluorescein angiography (FFA).

Time frame: Weeks 12 and 36

Mean Change From Baseline in Total Area of Leakage at Week 36, as Measured by FFA, in Treatment-Naive Participants

The total area of leakage was evaluated by a central reading center using fundus fluorescein angiography (FFA). This analysis used a Mixed Effects Model for Repeated Measurements (MMRM). Missing data were implicitly imputed by the MMRM, assuming a missing-at-random mechanism.

Time frame: Baseline, Week 36

Mean Change From Week 12 in Total Area of Leakage at Week 36, as Measured by FFA, in Anti-VEGF Incomplete Responders

The total area of leakage was evaluated by a central reading center using fundus fluorescein angiography (FFA).

Time frame: Weeks 12 and 36

Safety Summary of the Overall Number of Participants With at Least One Adverse Event by Event Type, in All Participants

This safety summary reports the number and percentage of participants who experienced at least one adverse event (AE) during the study. AEs are categorized as any AEs, ocular AEs occurring in the study eye or fellow eye, systemic AEs, serious AEs, AEs related to treatment with study drug, AEs leading to discontinuation (withdrawal) of treatment with study drug, and AEs with fatal outcome. The investigator independently assessed the seriousness and severity for each AE. Severity was graded according to the following grading scale: Mild = Discomfort noticed, but no disruption of normal daily activity; Moderate = Discomfort sufficient to reduce or affect normal daily activity; Severe = Incapacitating with inability to work or to perform normal daily activity. Severity and seriousness are not synonymous; regardless of severity, some AEs may have also met seriousness criteria.

Time frame: From Baseline until 28 days after the last dose of study treatment (up to 36 weeks)

Number of Participants With at Least One Ocular Adverse Event in the Study Eye or the Fellow Eye by Highest Intensity, in All Participants

The investigator assessed adverse event severity according to the following grading scale: Mild = Discomfort noticed, but no disruption of normal daily activity; Moderate = Discomfort sufficient to reduce or affect normal daily activity; Severe = Incapacitating with inability to work or to perform normal daily activity. Only the most severe intensity was counted for multiple occurrences of the same adverse event per participant at the preferred term level. Severity and seriousness are not synonymous; regardless of severity, some adverse events may have also met seriousness criteria.

Time frame: From Baseline until 28 days after the last dose of study treatment (up to 36 weeks)

Number of Participants With at Least One Systemic Adverse Event by Highest Intensity, in All Participants

The investigator assessed adverse event severity according to the following grading scale: Mild = Discomfort noticed, but no disruption of normal daily activity; Moderate = Discomfort sufficient to reduce or affect normal daily activity; Severe = Incapacitating with inability to work or to perform normal daily activity. Only the most severe intensity was counted for multiple occurrences of the same adverse event per participant at the preferred term level. Severity and seriousness are not synonymous; regardless of severity, some adverse events may have also met seriousness criteria.

Time frame: From Baseline until 28 days after the last dose of study treatment (up to 36 weeks)

Number of Participants With Abnormal Systolic Blood Pressure, in All Participants

Abnormal systolic blood pressure (supine) was defined as any value outside of the standard reference range, from \<70 (low) to \>140 (high) millimetres of mercury (mmHg). Baseline was defined as the last non-missing predose assessment. Not every abnormal vital sign qualified as an adverse event, only if it met any of the following criteria: clinically significant (per investigator); accompanied by clinical symptoms; resulted in a change in study treatment; or required a change in concomitant therapy.

Time frame: Assessed at each study visit from Baseline until 28 days after the last dose of study treatment (up to 36 weeks)

Number of Participants With Abnormal Diastolic Blood Pressure, in All Participants

Abnormal diastolic blood pressure (supine) was defined as any value outside of the standard reference range, from \<40 (low) to \>90 (high) millimetres of mercury (mmHg). Baseline was defined as the last non-missing predose assessment. Not every abnormal vital sign qualified as an adverse event, only if it met any of the following criteria: clinically significant (per investigator); accompanied by clinical symptoms; resulted in a change in study treatment; or required a change in concomitant therapy.

Time frame: Assessed at each study visit from Baseline until 28 days after the last dose of study treatment (up to 36 weeks)

Number of Participants With Abnormal Heart Rate, in All Participants

Abnormal heart rate (supine) was defined as any value outside of the standard reference range, from \<40 (low) to \>100 (high) beats per minute. Baseline was defined as the last non-missing predose assessment. Not every abnormal vital sign qualified as an adverse event, only if it met any of the following criteria: clinically significant (per investigator); accompanied by clinical symptoms; resulted in a change in study treatment; or required a change in concomitant therapy.

Time frame: Assessed at each study visit from Baseline until 28 days after the last dose of study treatment (up to 36 weeks)

Number of Participants With Abnormal Body Temperature, in All Participants

Abnormal body temperature (supine) was defined as any value outside of the standard reference range, from \<36.5 (low) to \>37.5 (high) degrees Celsius. Baseline was defined as the last non-missing predose assessment. Not every abnormal vital sign qualified as an adverse event, only if it met any of the following criteria: clinically significant (per investigator); accompanied by clinical symptoms; resulted in a change in study treatment; or required a change in concomitant therapy.

Time frame: Assessed at each study visit from Baseline until 28 days after the last dose of study treatment (up to 36 weeks)

Number of Participants With Marked Laboratory Abnormalities in Hematology and Coagulation Tests, in All Participants

Clinical laboratory tests for hematology and coagulation parameters were performed and any marked abnormal values (High or Low) were based on Roche's predefined standard reference ranges. Marked laboratory abnormalities are presented according to COG3007 abnormality criteria: Single, Not Last = abnormality detected at a single assessment, but not at the last assessment; Last or Replicated = abnormality detected at the last assessment or replicated at one or more assessments. Not every laboratory abnormality qualified as an adverse event, only if it met any of the following criteria: clinically significant (per investigator); accompanied by clinical symptoms; resulted in a change in study treatment; or required a change in concomitant therapy. Abs. = absolute count; Corp. = corpuscular; Ery. = erythrocyte; INR = International Normalized Ratio

Time frame: Predose at Baseline, Weeks 12 and 36, and at Early Termination and Unscheduled Visits (up to 36 weeks)

Number of Participants With Marked Laboratory Abnormalities in Blood Chemistry Tests, in All Participants

Clinical laboratory tests for blood chemistry parameters were performed and any marked abnormal values (High or Low) were based on Roche's predefined standard reference ranges. Marked laboratory abnormalities are presented according to COG3007 abnormality criteria: Single, Not Last = abnormality detected at a single assessment, but not at the last assessment; Last or Replicated = abnormality detected at the last assessment or replicated at one or more assessments. Not every laboratory abnormality qualified as an adverse event, only if it met any of the following criteria: clinically significant (per investigator); accompanied by clinical symptoms; resulted in a change in study treatment; or required a change in concomitant therapy. GGT = gamma-glutamyltransferase; SGOT/AST = serum glutamic oxaloacetic transaminase / aspartate aminotransferase; SGPT/ALT = serum glutamic pyruvic transaminase / alanine aminotransferase

Time frame: Predose at Baseline, Weeks 12 and 36, and at Early Termination and Unscheduled Visits (up to 36 weeks)

Mean Change From Baseline in Intraocular Pressure in the Study Eye Over Time, in All Participants

Intraocular pressure is the fluid pressure inside the eye. The method used to measure intraocular pressure (e.g., Goldmann tonometry) for each participant was to be applied consistently by the investigator throughout the study. On the day of dosing, intraocular pressure was monitored at 30 minutes post-treatment administration, and if intraocular pressure was ≥30 mmHg in the study eye, it was reassessed at 1 hour post-treatment administration.

Time frame: Baseline, 0.5 hours postdose on Day 1, predose and 0.5 hours postdose at Weeks 4, 8, 12, 16, 20, 24, 28, and 32, and at Weeks 1, 13, and 36

Change From Baseline in the Number of Participants With Anti-Drug Antibodies to Faricimab at Any Post-Baseline Timepoint

Blood samples were obtained for measurement of anti-faricimab antibodies by a validated enzyme-linked immunosorbent assay (ELISA).

Time frame: Baseline, Predose (0 hour) on Days 1, 28, 84, 112, 168, and 252 or early termination (up to 36 weeks)

Mean Plasma Concentration of Faricimab Over Time, in All Participants

Plasma concentrations of faricimab were measured by a specific validated enzyme-linked immunoabsorbent assay (ELISA) only from samples of participants randomized to receive faricimab. Baseline was defined as the last non-missing predose assessment. The lower limit of quantification (LLOQ) for the faricimab assay was 0.800 nanograms per millilitre (ng/mL). Values below the limit of quantification were imputed as LLOQ divided by 2.

Time frame: Predose (on days when treatment was administered) at Baseline and Weeks 4, 12, 13, 16, 24, and 36

Mean Change From Baseline in Free Vascular Endothelial Growth Factor-A (VEGF-A) Plasma Concentrations Over Time, in All Participants

The concentration of free VEGF was determined in plasma samples using an enzyme-linked immunosorbent assay (ELISA) method. The lower limit of quantification (LLOQ) of the assay was 15.6 picograms per millilitre (pg/mL). Plasma free VEGF concentrations below the limit of quantification were imputed as LLOQ divided by 2.

Time frame: Baseline, Weeks 4, 12, 13, 16, 24, and 36

Mean Change From Baseline in Total Angiopoietin-2 (Ang-2) Plasma Concentrations Over Time, in All Participants

Total Ang-2 concentrations were determined in plasma samples using an appropriate assay method. The lower limit of quantification (LLOQ) of the assay was 0.09 nanograms per millilitre (ng/mL). Plasma total Ang-2 concentrations below the limit of quantification were imputed as LLOQ divided by 2.

Time frame: Baseline, Weeks 4, 12, 13, 16, 24, and 36

Mean Change From Baseline in Free Angiopoietin-2 (Ang-2) Plasma Concentrations Over Time, in All Participants

Free Ang-2 concentrations were determined in plasma samples using an appropriate assay method. The lower limit of quantification (LLOQ) of the assay was 0.9 nanograms per millilitre (ng/mL). Plasma free Ang-2 concentrations below the limit of quantification were imputed as LLOQ divided by 2.

Time frame: Baseline, Weeks 4, 12, 13, 16, 24, and 36