I just ranted to the top two commenters so I'll keep this response brief.

Say in advance which parameters and subgroups you, as a researcher, care about in terms of significance. And keep your conclusions and discussions focused on the results for those groups. Report all of the other stuff, whether p-significant, or not, as supplementary data.

Hopefully, yours is not the only study that will use your data. Don't limit future researchers to your hypotheses.