A+ additonal form field Email Macros

Hi - Hope you are all well at wpmu

We would like to make use of the additional fields functionality in the A+ form.

However when we create an additional field and set to checkbox and then use the macro in the notification email it just shows '1' when checked and nothing when unchecked as if directly reflecting the value.

How best can we use this in our confirmation emails and is there any way to use e.g. ternary php if statements within the email notification to show or hide text based on the checkbox value?

Is there a Hook that we could use to achieve this?

Regards
SteveB