comorbidity female human 5 male 5 Article 4 rheumatoid arthritis 4 Female 3 Humans 3 adult 3 depression 3 major clinical study 3 Cohort Studies 2 Male 2 Middle Aged 2 Risk Assessment 2 Young Adult 2 adolescent 2 aged 2 all cause mortality 2 chronic lung disease 2 cohort analysis 2 congestive heart failure 2 controlled study 2 diabetes mellitus 2 incidence 2 liver disease 2 malignant neoplasm 2 metastasis 2 middle aged 2 peptic ulcer 2