2.2. Study Design
Alzheimer’s, daytime sleepiness, dementia, dementias
A randomized, single-blind, multicenter clinical trial was conducted in two associations of Alzheimer’s and other dementias to evaluate the effect of two non-pharmacological treatments, TE and NN, on sleep quality, daytime sleepiness, and cognitive function in patients with dementia. For this purpose, participants were randomly assigned to one of the three study groups (TEG; NNG; CG), using a fixed-size block design generated by the data manager to ensure a balanced randomization for each of the groups and in each of the participating centers. The allocation process was performed using probability convenience sampling [