Hi all,

I want to present the results of some subgroup analysis.
There are two potential effect modifiers, both are binary in nature.
I want to present the 4 possible subgroups in 1 forest plot, as below:

Subgroup: Ia
Study 1
Study 2
Study 3
Study 4
Study 5
Pooled analysis of subgroup Ia

Subgroup: Ib
Study 6
Study 7
Study 8
Study 9
Study 10
Pooled analysis of subgroup Ib

Pooled analysis of subgroup I (a+b)

Subgroup: IIa
Study 11
Study 12
Study 13
Study 14
Study 15
Pooled analysis of subgroup IIa

Subgroup: IIb
Study 16
Study 17
Study 18
Study 19
Study 20
Pooled analysis of subgroup IIb

Pooled analysis of subgroup II (a+b)

Is this possible?

Thanks in advance!