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. 2014 Jul 9;68(10):958–964. doi: 10.1136/jech-2014-204191

Table 2.

Distribution by length of first interbirth interval, education, marital status, age at first birth, parity and change of coparent since previous birth

  Length of 1st interbirth interval (months)
Men Women
0 1–17 18–29 30–41 42–59 60–89 90+ Deaths Person- years (000s) 0 1–17 18–29 30–41 42–59 60–89 90+ Deaths Person- years (000s)
Education
 10 years 1.0 13.4 25.6 21.9 18.8 11.7 7.8 15 227 2498.8 0.8 12.3 25.8 21.9 19.5 12.3 7.4 12 483 3259.3
 11–13 1.0 10.0 25.4 24.7 20.9 11.4 6.5 20 083 4965.9 0.9 10.4 25.3 24.6 21 11.6 6.2 12 256 5191.7
 14–17 1.2 7.3 25.5 26.4 21.8 11.5 6.5 5838 2161.2 1.2 7.8 27.6 26.5 20.6 10.6 5.8  3617 2322.7
 18+ 1.2 6.8 29.5 27.5 20.0 9.7 5.2 2139 975.8 1.5 6.7 29.2 25.9 20 10.7 6.1 376 286.3
Marital status
 Never-married 2.2 5.8 19.7 19.6 19.9 16.9 15.9 882 359.0 2.4 4.5 17.4 18.2 19.2 18.1 20.4 447 287.5
 Married 1.0 9.8 26.3 25.4 20.8 11.0 5.8 29 304 8543.3 0.9 10.1 26.4 25.1 20.8 11.2 5.6 18 587 8458.4
 Div/sep 1.1 11.5 24.8 22.0 19.0 12.0 9.7 11 718 1573.6 1.0 11.4 25.4 21.9 19.4 12.4 8.4 6662 1815.7
 Widowed 0.9 13.0 26.7 22.7 19.8 11.5 5.5 1383 125.8 0.8 13.8 27.5 22.3 18.9 10.9 5.8 3036 498.5
Age at 1st birth
 <20 0.5 11.7 20.3 15.5 18.9 16.0 15.9 1485 260.7 0.5 13.5 24.5 19.5 18.7 13.2 10.2 5187 1505.7
 20–22 0.6 12.7 24.0 20.8 19.6 12.8 9.6 9035 1746.3 0.6 12.4 25.4 22.4 19.8 11.9 7.4 9932 3408.1
 23–25 0.7 11.3 25.0 23.8 20.8 11.3 7.1 13 225 3002.7 0.8 9.2 25.2 25.7 21.7 11.4 5.9 7205 2968.4
 26–28 0.9 8.8 25.5 26.4 21.4 11.0 5.9 9910 2649.8 1.1 7.4 26.2 27.3 21.9 11.1 5.0 3838 1816.6
 29–31 1.2 7.5 26.6 27.1 21.2 11.2 5.3 5381 1575.7 1.6 7.4 28.5 27.2 20.7 10.8 3.8 1616 836.9
 32–34 1.7 7.5 28.8 27.0 20.4 10.6 4.0 2455 785.4 2.6 7.9 33.1 26.4 18.9 9.1 2.1 661 345.3
 35–37 2.8 8.2 32.5 26.9 18.3 8.4 2.9 1027 363.9 5.0 9.6 36.3 26.0 16.5 5.8 0.9 222 136.4
 38+ 5.3 10.7 35.4 25.0 14.9 6.7 2.1 769 217.3 8.7 13.9 38.4 23.6 12.0 3.2 0.2 71 42.5
Number of children
 2 1.0  5.8 20.2 25.1 24.8 14.8 8.4 22 112 5715.0 0.9 5.8 19.7 24.5 24.8 15.4 9.1 14 736 5872.1
 3 1.1 12.5 31.2 25.5 16.9 7.8 5.0 15 093 3676.7 1.0 13 31.6 25.4 17.1 8.0 3.9 10 015 3879.1
 4 1.3 21.8 36.3 19.8 11.4 5.9 3.6 6082 1210.0 1.2 22.8 37.9 19.9 11.2 4.9 2.0 3981 1308.8
Change of coparent
 No 1.1 10.2 27.1 25.8 21.1 10.7 3.9 40 132 9946.4 1.0 10.9 27.3 25.3 20.9 10.7 4.0 26 160 10288.3
 Yes 0.2 6.1 5.9 6.7 11.6 20.5 49.0 3155 655.3 0.4 3.4 8.9 9.9 15.1 23.0 39.3 2572 771.7
All 1.0 10.0 25.8 24.6 20.5 11.3 6.7 43 287 10601.7 1.0 10.3 26.0 24.2 20.5 11.5 6.4 28 732 11060.0