Following is true about longitudinal studies
Longitudinal studies are useful in: To study the natural history of disease and it's future outcome For identifying risk factors of disease For finding out incidence rate or rate of occurrence of new cases of disease in the community Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 78
Used to study the natural history of the disease
Single outcome
Are economical
Are efficient
Epidemiology