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. 2019 Sep 8;9(9):e031593. doi: 10.1136/bmjopen-2019-031593

Table 1.

Characteristics of the three cohorts of women, by cohort and childbirth group

Cohort 1995 (n=486 628) (%) Cohort 2000 (n=490 878) (%) Cohort 2005 (n=492 504) (%)
B0 B1 B1+ B0 B1 B1+ B0 B1 B1+
n 450 630 15 096 20 902 455 962 13 569 21 347 453 532 14 299 24 673
Age (years)
 18–24 58.1 36.2 35.3 55.4 29.4 25.6 56.7 25.8 21.4
 25–29 19.9 35.5 43.7 21.6 36.0 46.2 20.4 32.1 42.0
 30–34 11.9 20.1 17.7 12.4 24.4 23.8 12.4 28.6 30.9
 35–39 10.1 8.2 3.3 10.6 10.2 4.4 10.5 13.5 5.8
Country of birth
 Sweden 90.5 91.1 94.0 89.0 88.2 93.0 87.6 86.6 91.5
 Other Scandinavian country 2.2 2.6 1.7 1.4 1.7 1.2 1.1 1.4 1.0
 Other EU-25 1.6 1.3 0.8 1.5 1.3 0.8 1.6 1.5 1.0
 Rest of the world 5.7 5.0 3.5 8.1 8.8 5.0 9.7 10.5 6.5
Type of living area
 Large cities 41.7 39.7 37.0 43.3 41.6 41.4 43.4 43.8 44.1
 Medium-sized cities 34.9 34.9 35.4 35.1 34.5 34.2 35.7 33.7 34.2
 Small cities/village 23.4 25.4 27.6 21.7 23.9 24.4 20.9 22.5 21.8
Educational level
 Elementary school (≤9 years) 19.4 15.3 9.2 21.9 18.5 9.6 20.0 12.7 7.1
 High school (10–12 years) 57.2 60.0 57.3 49.5 52.7 48.1 45.9 47.2 38.6
 University/college (≥13 years) 23.4 24.7 33.5 28.6 28.8 42.3 34.1 40.1 54.3
Family situation
 Married or cohabitant 6.0 22.0 28.7 5.1 22.3 29.2 4.5 22.5 27.7
 Single 94.0 78.0 71.3 94.9 77.7 70.8 95.5 77.5 72.3

B0, no childbirth during follow-up; B1, first childbirth during index year (at date T0) of each cohort and no more children during follow-up; B1+, first childbirth at T0 and at least one more during follow-up; EU-25, European Union 25.