Hi! I am a researcher working on sleep stage classification. I am currently trying to choose a suitable database for my research. My question is, where can I find the number of records per subject in each database? I can only find the number of subjects now. Does anyone know how to find it? Thanks for help in advance!
For most datasets you should be able to get an idea of the number of datasets/records by reading the documentation, dataset introduction pages, and looking at variable distributions. For instance, in SHHS, you could look at these links to get a sense of how many subjects participated at each visit.
Thanks for your interest in the site and good luck on your sleep stage classification project.