with young people, women and people suffering with anxiety or depression the highest

[Maybo]

Reports of nightmares among citizens also rose during national lockdowns, with young people, women and people suffering with anxiety or depression the highest risk. (Why we shouldn’t be afraid of nightmares by William Park)

Is "had" omitted between "depression" and "the highest risk"?

 

[5jj]

No.

 

[GoesStation]

It's missing something. Having is possible, or the could be replaced with "at".

 

[jutfrank]

It's missing something. Having is possible,

Yes. Or facing, perhaps.

the could be replaced with "at"

Yes. Or the whole phrase could be among the highest-risk groups affected.