First of all, let me send my best wishes to all scientists and researchers, especially statistics experts.

Can experts help me with the following content?

1. I am studying a topic related to statistics in medicine, which is post-stratification weighting or multilevel modeling and sensitivity analyses. Do you have any documents, books or articles on that topic that you can share with me?

2. When conducting post-stratification weighting or multilevel modeling and sensitivity analyses on SPSS, how should I proceed?

Thank you very much.