The higher the dose of the antibody drug, which was given by subcutaneous injection, the larger the effect, Lilly said.
The Indianapolis-based drugmaker is launching a Phase III study of the experimental antibody, remternetug, but declined to comment on which doses will be selected for larger, later-stage trials.
Lilly, at a medical conference in Gothenburg, Sweden, presented interim data from 41 study participants.
Trial results published last year showed that, in patients with early Alzheimer's, Leqembi reduced the rate of cognitive decline by 27% compared with a placebo.
Brooks said that sharing its early remternetug data "reinforces Lilly's commitment and investment in the Alzheimer's disease space ...