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Table 1 Descriptive statistics for various immigrant characteristicsa

From: An observational study of immigrant mortality differences in Norway by reason for migration, length of stay and characteristics of sending countries

  Deaths (21429) Person-years (7.2 mill)
  Number Percent Number Percent
Reason for migration
 Refugee 3568 16.7 1.6 mill 22.0
 Family 1527 7.1 1.5 mill 20.5
 Labor 846 3.9 1.2 mill 16.4
 Education 81 0.4 252,181 3.5
 Other 80 0.4 19,185 0.3
 Nordic immigrants 7431 34.7 1.3 mill 18.6
 Unknown 7896 36.8 1.4 mill 18.9
Length of stay
  < 3 years 1294 6.0 1.5 mill 21.4
 3–6 years 1624 7.6 1.4 mill 20.1
 7–15 years 3220 15.0 1.9 mill 26.0
 16–30 years 5803 27.1 1.6 mill 22.5
 31–45 years 7005 32.7 604,610 8.4
  > 46 years 2483 11.6 117,609 1.6
Age at immigration
 Age < 3 123 0.6 52,955 0.7
 Age 3–6 135 0.6 91,905 1.3
 Age 7–15 604 2.8 337,066 4.7
 Age 16–18 601 2.8 274,292 3.8
 Age 19–30 8168 38.1 3.8 mill 53.3
 Age 31–45 7859 36.7 2.1 mill 29.7
 Age 46–60 2738 12.8 403,650 5.6
 Age > 60 1201 5.6 61,787 0.9
Human Development Indexb
 EU countries 5025 23.4 1.9 mill 26.4
 Other European countries 2109 9.8 795,466 11.0
 Low HDI (<  55) 1865 8.7 882,353 12.2
 Medium HDI (55–74) 2365 11.0 1.4 mill 18.7
 High HDI (≥ 75) 2634 12.3 941,577 13.1
  1. aDescriptive statistics (numbers and percentages) for deaths and person-years by immigrant characteristics. The distributions for socioeconomic covariates are shown in the Additional file 1, Table A2
  2. bHDI categorizations were applied to countries outside Europe, according to the United Nations’ classification. The most recent figures available were employed. The Nordic immigrants were categorized separately and are portrayed in the reason for migration category above. As such, the percentages do not add up to a 100 for this category