I conducted a study a while back that I'm writing a manuscript on for publication.
The study was broken down into 5 different parts. Let's call them parts A, B, C, D, and E for simplicity.
Suppose that parts A through D were all connected to each other, but part E only provided descriptive data from a set of items that hasn't even been tested for Cronbach's alpha. I included part E more or less out of sheer curiosity, but it presents no reliable data or relevant information to the understanding of parts A through D. It also isn't important in replicating the study, nor does it counter any findings in parts A through D. In other words, it's more of an extension to the first four parts, but not directly related to the findings of them.
Is it necessary to include part E in the manuscript (i.e., in the methods, results, and discussion sections) since parts A through E were administered in the same overall study? Or is it okay to simply not report parts of the study, so long as it does not bias the results of the parts you are reporting?