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Table 2 Absolute and relative educational inequalities in mortality in Norway over five decades, by gender

From: Trends in educational inequalities in cause specific mortality in Norway from 1960 to 2010: a turning point for educational inequalities in cause specific mortality of Norwegian men after the millennium?

  Men Women
Decade Absolute inequality* (95% CI) Absolute change in inequality* from previous period Absolute inequality* (95% CI) Absolute change in inequality* from previous period
1960s 313 (265, 361)   376 (336, 416)  
1970s 626 (583, 670) 313 (p < 0.01) 427 (395, 458) 51 (p = 0.05)
1980s 838 (796, 879) 211 (p < 0.01) 364 (336, 391) −63 (p < 0.01)
1990s 1050 (1013, 1087) 212 (p < 0.01) 495 (470, 519) 130 (p < 0.01)
2000s 1035 (1005, 1066) −14 (p = 0.561) 551 (529, 572) 56 (p < 0.01)
P-value for linear trend 0.018   0.025  
  Men Women
Decade Relative inequality** (95% CI) Change in relative inequality from previous period*** Relative inequality** (95% CI) Change in relative inequality from previous period***
1960s 1.21 (1.18, 1.26)   1.52 (1.46, 1.59)  
1970s 1.46 (1.42, 1.50) 0.18 (p < 0.01) 1.69 (1.63, 1.76) 0.11 (p < 0.01)
1980s 1.71 (1.67, 1.76) 0.16 (p < 0.01) 1.67 (1.61, 1.73) −0.01 (p = 0.59)
1990s 2.24 (2.18, 2.30) 0.27 (p < 0.01) 2.14 (2.07, 2.22) 0.25 (p < 0.01)
2000s 2.95 (2.86, 3.03) 0.27 (p < 0.01) 2.72 (2.62, 2.82) 0.24 (p < 0.01)
P-value for linear trend <0.001   0.013  
  1. *Slope Index of Inequality, SII. The number can be interpreted as the difference in absolute risk (unit is deaths per 100,000 person years) of dying related to be on a lower level in the educational hierarchy compared to be at the top.
  2. **Relative Index if Inequality, RII. The number can be interpreted as the mortality incidence rate ratio for those in the lower level in the educational hierarchy relative to those at the top.
  3. ***Change in ln(RII). Since RII is estimated on a log-scale, we investigate change using ln(RII) as this converts it to linear scale.