Bayes Theorem|Comorbidity|Computer Simulation|Data Interpretation, Statistical|Data Mining|Depression|Humans|Incidence|Irritable Bowel Syndrome|Mental Disorders|Metabolic Diseases|Migraine Disorders|Models, Statistical|Neurodegenerative Diseases|Pattern Recognition, Automated|Proportional Hazards Models|Reproducibility of Results|Risk Assessment|Sensitivity and Specificity