The healthy migrant effect in primary care.

Area of Science:

• Public Health
• Epidemiology
• Health Services Research

Background:

• Primary care patient registries offer a comprehensive view of health system utilization.
• Understanding immigrant health is crucial for equitable healthcare planning.
• The "healthy immigrant effect" suggests immigrants initially have better health outcomes than native populations.

Purpose of the Study:

• To compare the morbidity burden between immigrant and native populations in Aragón, Spain.
• To analyze health status differences using primary care data.
• To investigate the influence of length of stay on immigrant morbidity.

Main Methods:

• Retrospective observational study linking electronic health records and insurance data.
• Analysis of the entire population of Aragón, Spain (over 1.25 million individuals).
• Utilized the Adjusted Clinical Group System to assess morbidity profiles and logistic regression for comparisons.

Main Results:

• Confirmed the "healthy immigrant effect," with immigrants exhibiting lower disease prevalence than natives, particularly men.
• Natives had a higher prevalence of moderate to very high morbidity (52%) compared to various immigrant groups (20-33%).
• The health advantage diminished for immigrants residing in the country for 5 years or more.

Conclusions:

• Length of residency significantly impacts the morbidity burden of immigrants.
• Both immigrant men and women experienced a worsening health status with extended stays in the host country.
• Primary care data provides valuable insights into population health trends and disparities.