Table 3. Education Level, Employment, and Income by Gestational Age at Birth and Birth Year After Follow-up Through 2015, Sweden.
| Gestational Age at Birth | Total Births, No. | Education >12 y | Employed | Income >Cohort Median | |||
|---|---|---|---|---|---|---|---|
| % | PR (95% CI)a | % | PR (95% CI)a | % | PR (95% CI)a | ||
| 1973-1997 | |||||||
| All births, 1973-1997 (attained ages 18-43 y; median, 29.8 y) | 2 566 699 | 36.9 | 91.0 | 50.0 | |||
| Preterm (<37 wk) | 149 065 | 33.5 | 0.95 (0.95-0.96) | 84.8 | 0.93 (0.93-0.93) | 47.8 | 0.96 (0.95-0.96) |
| Extremely (22-27 wk) | 5391 | 23.0 | 0.74 (0.70-0.79) | 40.7 | 0.45 (0.43-0.46) | 37.0 | 0.79 (0.76-0.83) |
| Very (28-33 wk) | 33 025 | 31.0 | 0.91 (0.90-0.93) | 79.2 | 0.87 (0.86-0.87) | 45.9 | 0.93 (0.92-0.94) |
| Late (34-36 wk) | 110 649 | 34.4 | 0.97 (0.96-0.97) | 88.6 | 0.97 (0.97-0.97) | 48.6 | 0.97 (0.96-0.98) |
| Early term (37-38 wk) | 447 249 | 35.6 | 0.99 (0.99-0.99) | 90.6 | 0.99 (0.99-0.99) | 49.1 | 0.99 (0.98-0.99) |
| Full-term (39-41 wk) | 1 742 809 | 37.2 | 1 [Reference] | 91.6 | 1 [Reference] | 50.2 | 1 [Reference] |
| Postterm (≥42 wk) | 227 576 | 38.8 | 0.98 (0.97-0.99) | 91.4 | 1.00 (1.00-1.00) | 51.3 | 0.99 (0.98-0.99) |
| 1973-1979 | |||||||
| Born 1973-1979 (attained ages 36-43 y; median, 39.7 y) | 699 473 | 48.0 | 91.3 | 57.4 | |||
| Preterm (<37 wk) | 35 636 | 43.0 | 0.92 (0.90-0.93) | 82.9 | 0.91 (0.90-0.91) | 56.5 | 0.96 (0.95-0.97) |
| Extremely (22-27 wk) | 1155 | 32.8 | 0.70 (0.60-0.81) | 26.1 | 0.29 (0.26-0.31) | 50.5 | 0.88 (0.79-0.98) |
| Very (28-33 wk) | 7869 | 40.9 | 0.88 (0.85-0.90) | 73.5 | 0.80 (0.79-0.81) | 56.0 | 0.95 (0.93-0.97) |
| Late (34-36 wk) | 26 612 | 43.7 | 0.93 (0.92-0.94) | 88.1 | 0.96 (0.96-0.97) | 56.7 | 0.97 (0.96-0.98) |
| Early term (37-38 wk) | 98 895 | 47.3 | 0.98 (0.97-0.99) | 90.9 | 0.99 (0.99-0.99) | 57.8 | 0.99 (0.98-0.99) |
| Full-term (39-41 wk) | 475 210 | 48.8 | 1 [Reference] | 91.9 | 1 [Reference] | 57.6 | 1 [Reference] |
| Postterm (≥42 wk) | 89 732 | 46.8 | 0.99 (0.98-1.00) | 92.0 | 1.00 (1.00-1.01) | 56.6 | 0.99 (0.98-1.00) |
| 1980-1989 | |||||||
| Born 1980-1989 (attained ages 26-35 y; median, 30.7 y) | 989 229 | 45.9 | 93.0 | 56.0 | |||
| Preterm (<37 wk) | 60 203 | 42.5 | 0.95 (0.94-0.96) | 87.4 | 0.94 (0.93-0.94) | 55.0 | 0.97 (0.96-0.98) |
| Extremely (22-27 wk) | 1957 | 32.6 | 0.73 (0.67-0.80) | 42.3 | 0.45 (0.43-0.48) | 44.3 | 0.79 (0.74-0.85) |
| Very (28-33 wk) | 12 760 | 40.0 | 0.91 (0.89-0.93) | 82.1 | 0.88 (0.87-0.89) | 53.3 | 0.94 (0.92-0.95) |
| Late (34-36 wk) | 45 486 | 43.4 | 0.97 (0.96-0.98) | 90.8 | 0.97 (0.97-0.98) | 55.6 | 0.98 (0.97-0.99) |
| Early term (37-38 wk) | 186 892 | 45.0 | 0.98 (0.98-0.99) | 92.8 | 0.99 (0.99-0.99) | 55.9 | 0.99 (0.99-1.00) |
| Full-term (39-41 wk) | 665 583 | 46.5 | 1 [Reference] | 93.5 | 1 [Reference] | 56.1 | 1 [Reference] |
| Postterm (≥42 wk) | 76 551 | 46.1 | 0.98 (0.98-0.99) | 93.0 | 1.00 (1.00-1.00) | 55.9 | 0.99 (0.99-1.00) |
| 1990-1997 | |||||||
| Born 1990-1997 (attained ages 18-25 y; median, 22.5 y) | 877 997 | 17.6 | 88.5 | 37.6 | |||
| Preterm (<37 wk) | 53 226 | 17.1 | 0.99 (0.97-1.01) | 83.1 | 0.93 (0.93-0.94) | 34.7 | 0.93 (0.92-0.94) |
| Extremely (22-27 wk) | 2279 | 13.9 | 0.80 (0.71-0.90) | 46.8 | 0.52 (0.50-0.55) | 28.8 | 0.77 (0.71-0.84) |
| Very (28-33 wk) | 12 396 | 16.4 | 0.97 (0.93-1.01) | 79.9 | 0.90 (0.89-0.90) | 33.4 | 0.90 (0.88-0.93) |
| Late (34-36 wk) | 38 551 | 17.4 | 1.00 (0.98-1.03) | 86.2 | 0.97 (0.96-0.97) | 35.3 | 0.94 (0.93-0.96) |
| Early term (37-38 wk) | 161 462 | 17.3 | 0.99 (0.98-1.01) | 87.9 | 0.99 (0.98-0.99) | 36.3 | 0.96 (0.95-0.97) |
| Full-term (39-41 wk) | 602 016 | 17.7 | 1 [Reference] | 89.2 | 1 [Reference] | 38.1 | 1 [Reference] |
| Postterm (≥42 wk) | 61 293 | 17.7 | 0.97 (0.96-0.99) | 88.6 | 1.00 (1.00-1.00) | 38.3 | 1.00 (0.99-1.01) |
Abbreviation: PR, prevalence ratio.
a
Adjusted for child characteristics (birth year, sex, fetal growth, multiple birth, birth order) and maternal characteristics (age, education, smoking, preeclampsia, other hypertensive disorders, diabetes).