The GA lesion area was measured by a quantified central reading center based on FAF images. LS mean was calculated using a mixed effect model for repeated measure (MMRM) model. Baseline was defined as the last available, non-missing observation prior to first study drug administration.

The modified ITT (mITT) analysis set consisted of all subjects assigned to treatment who received at least 1 injection of pegcetacoplan or sham and had baseline and at least 1 post-baseline value of GA lesion area in the study eye as assessed by FAF. Subjects with a baseline and at least 1 post-baseline value of the outcome at a scheduled visit by Month 12 were included in the analysis.

The GA lesion area was measured by a quantified central reading center based on FAF images. LS mean was calculated using a MMRM model. Baseline was defined as the last available, non-missing observation prior to first study drug administration.

The mITT analysis set consisted of all subjects assigned to treatment who received at least 1 injection of pegcetacoplan or sham and had baseline and at least 1 post-baseline value of GA lesion area in the study eye as assessed by FAF. Subjects with a baseline and at least 1 post-baseline value of the outcome at a scheduled visit by Month 24 were included in the analysis.

The mean change in GA lesion area through Month 24 was measured by assuming a piecewise linear trend in time with knots by FAF images at Months 6, 12, and 18 and was calculated using a MMRM model. Baseline was defined as the last available, non-missing observation prior to first study drug administration.

The mITT analysis set consisted of all subjects assigned to treatment who received at least 1 injection of pegcetacoplan or sham and had baseline and at least 1 post-baseline value of GA lesion area in the study eye as assessed by FAF.

The maximum reading speed of the study eye was calculated per Minnesota Low-Vision Reading Test (MNREAD) or Radner Reading Charts user manuals, with no adjustment for reading inaccuracy. An additional step to cap resulting reading speed values at a maximum of 300 words per minute (wpm) was implemented. Maximum reading speed was calculated as the mean of the 3 highest non-zero reading speeds (or 2, or 1 value, as available), except when all wpm were calculated as 0 then the maximum reading speed was calculated as 0. LS mean was calculated using a MMRM model. Baseline was defined as the last available, non-missing observation prior to first study drug administration.

The mITT analysis set consisted of all subjects assigned to treatment who received at least 1 injection of pegcetacoplan or sham and had baseline and at least 1 post-baseline value of GA lesion area in the study eye as assessed by FAF. Subjects with a baseline and at least 1 post-baseline value of the outcome at a scheduled visit by Month 24 were included in the analysis.

The FRI was an interviewer-administered questionnaire with 7 items on functional reading activities most relevant to GA AMD subjects. It had 1 total index score. For each FRI Index reading activity performed in the past 7 days, subjects were asked about the extent to which they required assistance beyond eyeglasses/contact lenses, including the use of low-vision aids, adjustments in the activity, or help from another subject. Mean FRI Index scores ranged from 1 (unable to do independently) to 4 (totally independent), with higher scores indicating higher functional reading independence. A negative change from baseline indicated a decrease in the FRI; disease worsening. LS mean was calculated using a MMRM model. Baseline was defined as the last available, non-missing observation prior to first study drug administration.

The mITT analysis set consisted of all subjects assigned to treatment who received at least 1 injection of pegcetacoplan or sham and had baseline and at least 1 post-baseline value of GA lesion area in the study eye as assessed by FAF. Subjects with a baseline and at least 1 post-baseline value of the outcome at a scheduled visit by Month 24 were included in the analysis.

The NL-BCVA was assessed by early treatment diabetic retinopathy study (ETDRS) chart prior to dilating the eyes at a starting distance of 4 meters and ranged from 0 (least score) to 100 (best score). If the 4-meter score was >19 letters read correctly, the visual acuity score was the sum of total letters correctly read at 4 meters plus the addition of 30. If the 4-meter score was ≤19 letters read correctly, the visual acuity score was the sum of total letters read correctly at 4 meters and total letters read correctly at the 1-meter distance. If no letters were read correctly at either the 4-meter distance or the 1-meter distance, the visual acuity score was 0. A positive change in the value indicated improvement in visual acuity. LS mean was calculated using a MMRM model. Baseline was defined as the last available, non-missing observation prior to first study drug administration.

The mITT analysis set consisted of all subjects assigned to treatment who received at least 1 injection of pegcetacoplan or sham and had baseline and at least 1 post-baseline value of GA lesion area in the study eye as assessed by FAF. Subjects with a baseline and at least 1 post-baseline value of the outcome at a scheduled visit by Month 24 were included in the analysis.