American Journal of Epidemiology Vol. 122, No. 2: 291-301
Copyright © 1985 by The Johns Hopkins University School of Hygiene and Public Health
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LONGITUDINAL ANALYSIS OF THE RELATIONSHIP BETWEEN BLOOD PRESSURE AND MIGRATION: THE TOKELAU ISLAND MIGRANT STUDY
1Epidemiology Unit, Wellington Hospital Private Bag, Wellington, New Zealand
2Department of Epidemiology, School of Public Health, University of Michigan Ann Arbor, MI
3Departments of Community Health and Sociology, Brown University Providence, RI
Reprint requests to Clare E. Salmond
The Pacific atoll population of Tokelau has been followed since 1968 to assess the health consequences of migration to a western society. The blood pressure of a cohort of 532 adults who were still living in Tokelau in 1976 (nonmigrants) are compared with those of a cohort of 280 adults who had migrated to New Zealand (migrants). Significant differences between migrants and nonmigrants were detected in the rates of change of both systolic and diastolic pressures in men, and in the rates of change of diastolic pressures in women. The age-, body mass-, and blood pressure-corrected rates of change were greater in migrants than in nonmigrants, and greater in men than in women. Blood pressures tend to rise 1 mmHg/year faster among male migrants than among male nonmigrants, and about 0.4 mmHg/year faster among female migrants than among female nonmigrants. These findings have dear implications for the health of migrants.
acculturation; blood pressure; longitudinal studies
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