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Table 3 Results of inequality indexes for birth rate depending on educational attainment

From: The effect of educational attainment on birthrate in Japan: an analysis using the census and the vital statistics from 2000 to 2020

 

Age group

 

20–24

25–29

30–34

35–39

40–44

45–49

Year and gender

Estimates (95%CI)

Estimates (95%CI)

Estimates (95%CI)

Estimates (95%CI)

Estimates (95%CI)

Estimates (95%CI)

SII*

      

Men

      

2000

-78.9 (−135.3, −22.5)

-58.6 (−144.6, 27.3)

2.8 (-73.8, 79.5)

10.4 (-24.5, 45.2)

1.9 (-4.8, 8.5)

0.4 (-2.5, 3.3)

2010

-72.7 (−135.0, −10.4)

-54.2 (−149.4, 41.0)

15.2 (-43.5, 73.9)

15.0 (1.9, 28.2)

4.2 (-0.4, 8.8)

1.3 (-4.3, 7.0)

2020

-74.0 (−167.1, 19.0)

-51.2 (−124.8, 22.3)

29.4 (-47.6, 106.3)

19.2 (-12.0, 50.5)

5.2 (-5.7, 16.0)

2.2 (-4.0, 8.3)

Women

      

2000

-110.1 (−149.6, −70.5)

-64.0 (−205.5, 77.6)

-4.1 (−89.9, 81.7)

6.8 (4.3, 9.3)

1.9 (1.2, 2.6)

0.0 (-0.3, 0.4)

2010

-112.2 (−166.7, −57.6)

-71.9 (−169.8, 25.9)

12.3 (-60.8, 85.4)

16.0 (13.7, 18.3)

1.7 (-9.1, 12.5)

-0.1 (−2.1, 1.8)

2020

-103.3 (−210.8, 4.2)

-72.2 (−148.3, 4.0)

20.4 (-48.8, 89.5)

27.1 (6.4, 47.7)

7.8 (-2.3, 18.0)

0.5 (-0.4, 1.4)

RII*

      

Men

      

2000

0.12 (0.01, 1.24)

0.43 (0.10, 1.83)

1.04 (0.44, 2.47)

1.23 (0.63, 2.39)

1.12 (0.77, 1.63)

1.07 (0.63, 1.82)

2010

0.15 (0.03, 0.87)

0.52 (0.16, 1.74)

1.18 (0.64, 2.16)

1.34 (1.04, 1.74)

1.26 (0.98, 1.61)

1.18 (0.58, 2.39)

2020

0.09 (0.01, 0.92)

0.48 (0.16, 1.42)

1.39 (0.62, 3.13)

1.41 (0.82, 2.42)

1.30 (0.72, 2.33)

1.29 (0.59, 2.81)

Women

      

2000

0.08 (0.01, 0.41)

0.42 (0.07, 2.71)

0.95 (0.35, 2.58)

1.19 (1.11, 1.27)

1.34 (1.23, 1.45)

1.18 (0.14, 9.76)

2010

0.07 (0.01, 0.38)

0.41 (0.11, 1.61)

1.16 (0.51, 2.62)

1.36 (1.27, 1.46)

1.13 (0.49, 2.61)

0.86 (0.02, 34.64)

2020

0.05 (0.01, 0.28)

0.38 (0.12, 1.26)

1.25 (0.61, 2.55)

1.59 (1.06, 2.40)

1.57 (0.92, 2.69)

2.14 (0.51, 9.02)

  1. CI, confidence interval; SII, slope index of inequality; RII, relative index of inequality
  2. *The linear regression model was used to calculate RII and SII.