Dear SPSS newsgroup subscribers,
I am trying to select cases with *valid* (i.e., non-missing values) based on
two variables. The idea is to select those *same* cases based on *valid*
values for *TWO* variables: one variable represents the "baseline" value
(e.g., baseline body weight, let's call the variable "basebw") and after 10
weeks the body weight is measured again (let's call it discharge body
weight, or "disbw").
The problem that I am having is this:
At baseline I have valid (non-missing) body weight values for 600 cases
(individuals), but after 10 weeks I have valid (non-missing) body weight
values for *only* 215 cases.
What I want to is: SELECT THOSE 215 cases who have valid discharge weight
values **AND ALSO** have valid baseline weight values.
How best can this be achieved in SPSS for Windows?
I appreciate your kind and prompt assistance.
- Mamdouh Shubair