Epidemiological investigation and analysis of immigrants

Traditional epidemiological research methods can be used in the study of migration epidemiology, such as distribution research, current situation investigation, case-control study and cohort study. This comparison can be made by residents of the country of immigration, residents of the country of original residence, compatriots or by region and disease. Because there are many young and middle-aged immigrants and the population composition is different in different places, the rates used need to be adjusted before they can be compared. Compare the availability, SMR, RR and calculated expected value with the observed value. The difference test can be chi-square test and t test.

Since immigration research cannot be randomly sampled, special attention should be paid to the existence of bias.