A Multi-centre, Double-blind, Parallel-group, Randomised Controlled Study to Investigate Efficacy, Safety and Tolerability of Orally Administered BI 409306 During a 12-week Treatment Period Compared to Placebo in Patients With Cognitive Impairment Due to Alzheimer's Disease

Change From Baseline in Neuropsychological Test Battery in Total Z-score After 12-week Treatment.

时间窗: Baseline and 12 weeks

Neuropsychological Test Battery (NTB) response, defined as change from baseline in total z-score after 12 weeks of treatment. The NTB consists of 9 validated components. Raw scores on each of the 9 NTB tests were converted to z-scores using the baseline means and standard deviations (SDs) for each test. The resultant z-scores were averaged to obtain a total z-score, incorporating all 9 NTB tests. The NTB Z-score indicates the number of standard deviations away from the mean. A Z-score of 0 is equal to the mean at baseline. Negative numbers indicate values lower than baseline and positive numbers indicate values higher than baseline. Least Squares Mean is actually an adjusted mean change from baseline.

Change From Baseline in Neuropsychological Test Battery in Total Z-score After 12-week Treatment From Two Sister Trials, Present 1289.5 (NCT02240693) and 1289.7 (NCT02337907)

时间窗: Baseline and 12 weeks

Neuropsychological Test Battery (NTB) response, defined as change from baseline in total z-score after 12 weeks of treatment. The NTB consists of 9 validated components. Raw scores on each of the 9 NTB tests were converted to z-scores using the baseline means and standard deviations (SDs) for each test. The resultant z-scores were averaged to obtain a total z-score, incorporating all 9 NTB tests. The NTB Z-score indicates the number of standard deviations away from the mean. A Z-score of 0 is equal to the mean at baseline. Negative numbers indicate values lower than baseline and positive numbers indicate values higher than baseline. The number of low test scores decreased with higher levels of intellectual abilities. Least Squares Mean is actually an adjusted mean change from baseline.