I'm trying to understand why it's important to adjust for comorbidities. Isn't this a major factor with any variant? Honest question. What good does it do to adjust for this when it's always a major reason for hospitalization and death?
If you sort of think backwards, starting from the assumption that the article's conclusion is correct, it implies that comorbidity complications have decreased compared to previous waves. That could be a case of the authors covarying away an effect, but it could mean some comorbid conditions have declined in the pandemic in the study population. It might also mean treatment of the comorbidities has improved (?)