Percent change in lumbar CSF concentrations of Aβ1-40 and Aβ1-42 from baseline at 12 weeks post-dose was calculated. The units for CSF were picograms per milliliter (pg/mL). Least Squares (LS) means of percent change in concentration from baseline was calculated using analysis of covariance (ANCOVA) with baseline as a covariate and treatment as a fixed effect.

All randomized participants with evaluable post-baseline CSF Aβ1-40 or Aβ1-42 data.

Percent change in lumbar CSF concentrations of Aβ1-40 and Aβ1-42 from baseline at 26 weeks post-dose was to be calculated. The units for CSF were picograms per milliliter (pg/mL). LS means of percent change in concentration from baseline was calculated using ANCOVA with baseline as a covariate and treatment as a fixed effect.

Zero participants analyzed. CSF Aβ1-40 and Aβ1-42 concentrations data was not collected for analysis at 26 weeks.

Percent change in plasma concentrations of Aβ1-40 and Aβ1-42 from baseline at 12 weeks and 26 weeks post-dose was calculated. The units for CSF were picograms per milliliter (pg/mL).

All randomized participants with evaluable post-baseline CSF Aβ1-40 or Aβ1-42 data.

The NTB is a composite cognitive measure in clinical Alzheimer's disease studies and is a collection of several written and oral tests that examines verbal and nonverbal brain functions. NTB Z-score typically ranges from -3 to 3, with lower scores suggesting greater cognitive impairment. LS means were calculated using ANCOVA with baseline as a covariate and treatment as a fixed effect.

All randomized participants with evaluable NTB data.

ADAS-Cog11 is an 11-item instrument measuring impairment in memory (Items 1-4, 7, 11), praxis (Items 4 and 5), orientation (Item 6), and language (Items 8-10). Item 1 ranged 0 (all items recalled correctly)-10 (none recalled correctly); Items 2-5 and 8-11 ranged 0 (all items named, performed, drawn, spoken, remember correctly/clearly)-5 (none correct/not clearly spoken); Item 6 ranged 0 (no incorrect responses)-8 (all incorrect); and Item 7 ranged 0 (all words remembered correctly)-12 (no words remembered correctly) for a total ADAS-Cog11 score of 0-70 with higher scores indicating greater disease severity. A score of 0-10 for delayed free recall and a conversion code of 0-5 for digit cancellation and maze completion was added to the total ADAS-Cog11 score for a total ADAS-Cog14 score ranging 0-90 with higher scores indicating greater impairment. LS means were calculated using Mixed Model Repeated Measures (MMRM) with Treatment + Visit + Treatment*Visit + Baseline + Baseline*Visit.

All randomized participants with evaluable ADAS-Cog data.

The CDR-SB is a composite measure of 6 domains of cognitive and functional performance: memory, orientation, judgment and problem solving, community affairs, home and hobbies, and personal care. Scores ranged from 0 to 18, with higher scores indicating greater impairment. LS means were calculated using MMRM with Treatment + Visit + Treatment*Visit + Baseline + Baseline*Visit.

All randomized participants with evaluable CDR-SB data.

The MMSE (Folstein et al. 1975) is one of the most widely used screening instruments for cognitive impairment. The test consists of five sections (orientation, registration, attention-calculation, recall, and language) and provides a total score ranging from 0 to 30, with lower scores indicative of greater cognitive impairment. LS means were calculated using MMRM with Treatment + Visit + Treatment*Visit + Baseline + Baseline*Visit.

All randomized participants with evaluable MMSE data.

Percent change in lumbar CSF tau and ptau-181 concentrations from baseline at 12 weeks post-dose and 26 weeks post-dose was calculated. The units for CSF were picograms per milliliter (pg/mL). Least Squares (LS) means of percent change in concentration from baseline was calculated using analysis of covariance (ANCOVA) with baseline as a covariate and treatment as a fixed effect.

All randomized participants at 12 weeks with evaluable post-baseline CSF Tau or Ptau data.

Zero participants analyzed for 26 week CSF Tau or Ptau as data was not collected for analysis.