Can the SendMail from a form only send data from the decision checkboxes selected by the user?

Can the SendMail from a form only send data from the decision checkboxes selected by the user?

I have the email set up, so that it sends a copy of the data to the form user once they have completed it. However, as I am using a lot of decision checkboxes, with only a few actually being ticked by the user, I want to know if there is any way of limiting the data that is sent on the form to those decision checkboxes that have been checked by the user?

Does anyone know how to do this please?