[R-meta] Subgroup analyses

Dear list members,

I am trying to run subgroup analyses in my meta analysis. I have the 
issue that I do not know whether I should include an intercept or not, 
meaning whether I should do mods = ~ Coil.Type (with intercept) or 
mods = ~ Coil.Type - 1 (without intercept).

From what I know so far we can leave out the intercept if for x = 0 -> 
y = 0. Unfortunately I don't think that logic applies here. My 
variables (as for example Coil Type) do not have a 'zero' condition, 
it compares for example Coil A with Coil B.
If I want to write down the values as a table, I cannot do that well 
when including the intercept because then the estimate, standard error 
and CI are from the difference to the intercept and not from the level 
itself.

Since the Moderator tests become more easily significant when 
excluding the intercept, I was hesitant to do so. Therefore I would be 
thankful if anyone could clear me up on when/if I am allowed to get 
rid of the Intercept in my case.

Thanks in advance.

Best,
David