Immigration and suicide: the role of marital status, duration of residence, and social integration.

The purpose of the study was to assess the impact of immigration on suicide. An unmatched case-control design was employed. Data on cases were obtained on suicides in Riverside County, California, 1998 to 2001. Information on controls was obtained from the 2000 Census. Immigration increased suicide risk. Immigrant divorced persons were over 2 times more likely to commit suicide than natives. Single immigrants were nearly 2.6 times more likely to kill themselves than the native born. Shorter duration of residence was associated with higher suicide risk. Integration of immigrants in receiving societies is important for decreasing suicide. Policies aimed at reducing suicide should target more recent immigrants.