All of the following features are true about cross sectional study except-
Although a cross-sectional study provides information about disease prevalence it provide very little information of about the natural history of the disease or about the rate of occurrence of the disease (refer pg no:69 park 23 rd edition)
All cases are seen at one point in time
Follow up is not a necessary feature
More useful for chronic disease
Cause and effect relationship can be established
Epidemiology