Start here to find articles in the medical and health sciences fields. Combine these words in your searches with a chronic disease:
Pathophysiology/Description of the disease: Use Etiology, Pathophysiology, Pathology
Prevalence of the disease: Use Epidemiology
Comorbidities(more than one disease/condition is present): Use Comorbidity
Life expectancy/Mortality: Use Prognosis, Risk Factors, Mortality
Lifestyle modifications: Use "life style" or specific kinds of modification, for example: diet, drug therapy, exercise