RAND Corporation, Santa Monica, CA 90407, USA.
J Aging Health. 2013 Feb;25(1):136-58. doi: 10.1177/0898264312468155. Epub 2012 Dec 21.
Investigate the "salmon-bias" hypothesis, which posits that Mexicans in the U.S. return to Mexico due to poor health, as an explanation for the Hispanic health paradox in which Hispanics in the United States are healthier than might be expected from their socioeconomic status.
Sample includes Mexicans age 50 years or above living in the United States and Mexico from the 2003 Mexican Health and Aging Study and the 2004 Health and Retirement Study. Logistic regressions examine whether nonmigrants or return migrants have different odds than immigrants of reporting a health outcome.
The salmon-bias hypothesis holds for select health outcomes. However, nonmigrants and return migrants have better health outcomes than immigrants on a variety of indicators.
Overall, the results of this study do not support the salmon-bias hypothesis; other explanations for the paradox could be explored.
调查“三文鱼偏差”假说，该假说认为，美国的墨西哥人由于健康状况不佳而返回墨西哥，这是解释西班牙裔健康悖论的一种假说，即在美国的西班牙裔人比其社会经济地位所预期的更健康。
样本包括年龄在 50 岁或以上的居住在美国和墨西哥的墨西哥人，来自 2003 年墨西哥健康和老龄化研究和 2004 年健康和退休研究。逻辑回归检验非移民或返回移民与移民相比报告健康结果的几率是否不同。
三文鱼偏差假说适用于某些健康结果。然而，在各种指标上，非移民和返回移民的健康结果均优于移民。
总的来说，这项研究的结果并不支持三文鱼偏差假说；可以探索其他解释悖论的方法。
