Table 3.
Adverse perinatal outcome by maternal educational level, all births, Denmark, 2000–2009
| RR | 95 % CI | aRR | 95 % CI | |
| Stillbirth | ||||
| Primary education | 1.39 | 1.26 to 1.53 | 1.34 | 1.21 to 1.48 |
| Vocational education | 1.00 | 1.00 | ||
| Secondary education | 0.84 | 0.71 to 0.98 | 0.81 | 0.69 to 0.94 |
| Short-cycle and medium-cycle higher education | 0.89 | 0.81 to 0.97 | 0.89 | 0.81 to 0.98 |
| Long-cycle higher education | 0.65 | 0.57 to 0.74 | 0.64 | 0.56 to 0.72 |
| Neonatal mortality | ||||
| Primary education | 1.33 | 1.16 to 1.51 | 1.29 | 1.12 to 1.47 |
| Vocational education | 1.00 | 1.00 | ||
| Secondary education | 0.92 | 0.76 to 1.13 | 0.90 | 0.73 to 1.10 |
| Short-cycle and medium-cycle higher education | 0.79 | 0.70 to 0.90 | 0.80 | 0.71 to 0.92 |
| Long-cycle higher education | 0.79 | 0.67 to 0.93 | 0.79 | 0.67 to 0.93 |
| Postneonatal mortality* | ||||
| Primary education | 1.93 | 1.59 to 2.35 | 1.81 | 1.47 to 2.22 |
| Vocational education | 1.00 | 1.00 | ||
| Secondary education | 1.02 | 0.74 to 1.41 | 0.98 | 0.71 to 1.36 |
| Short-cycle and medium-cycle higher education | 0.74 | 0.59 to 0.92 | 0.76 | 0.61 to 0.95 |
| Long-cycle higher education | 0.55 | 0.41 to 0.75 | 0.57 | 0.42 to 0.78 |
| Congenital anomalies | ||||
| Primary education | 1.14 | 1.09 to 1.18 | 1.13 | 1.08 to 1.18 |
| Vocational education | 1.00 | 1.00 | ||
| Secondary education | 0.92 | 0.86 to 0.98 | 0.91 | 0.86 to 0.97 |
| Short-cycle and medium-cycle higher education | 0.94 | 0.90 to 0.97 | 0.93 | 0.90 to 0.97 |
| Long-cycle higher education | 0.88 | 0.84 to 0.92 | 0.87 | 0.83 to 0.91 |
| Moderate preterm birth, 32+0 to 36+6† | ||||
| Primary education | 1.07 | 1.04 to 1.10 | 1.11 | 1.08 to 1.14 |
| Vocational education | 1.00 | 1.00 | ||
| Secondary education | 0.88 | 0.84 to 0.92 | 0.89 | 0.86 to 0.93 |
| Short-cycle and medium-cycle higher education | 0.89 | 0.87 to 0.92 | 0.89 | 0.86 to 0.91 |
| Long-cycle higher education | 0.81 | 0.79 to 0.84 | 0.80 | 0.77 to 0.83 |
| Very preterm birth, 28+0 to 31+6† | ||||
| Primary education | 1.06 | 0.98 to 1.15 | 1.10 | 1.01 to 1.20 |
| Vocational education | 1.00 | 1.00 | ||
| Secondary education | 0.89 | 0.79 to 1.01 | 0.91 | 0.81 to 1.03 |
| Short-cycle and medium-cycle higher education | 0.83 | 0.77 to 0.90 | 0.82 | 0.76 to 0.89 |
| Long-cycle higher education | 0.80 | 0.73 to 0.88 | 0.78 | 0.71 to 0.86 |
| Extreme preterm birth, <28+0† | ||||
| Primary education | 1.36 | 1.20 to 1.54 | 1.35 | 1.19 to 1.54 |
| Vocational education | 1.00 | 1.00 | ||
| Secondary education | 0.79 | 0.64 to 0.96 | 0.78 | 0.63 to 0.96 |
| Short-cycle and medium-cycle higher education | 0.77 | 0.68 to 0.87 | 0.76 | 0.67 to 0.86 |
| Long-cycle higher education | 0.78 | 0.67 to 0.91 | 0.76 | 0.65 to 0.89 |
| SGA | ||||
| Primary education | 1.32 | 1.30 to 1.35 | 1.25 | 1.22 to 1.28 |
| Vocational education | 1.00 | 1.00 | ||
| Secondary education | 0.99 | 0.96 to 1.02 | 0.96 | 0.93 to 0.99 |
| Short-cycle and medium-cycle higher education | 0.82 | 0.80 to 0.84 | 0.83 | 0.82 to 0.85 |
| Long-cycle higher education | 0.82 | 0.80 to 0.84 | 0.83 | 0.81 to 0.85 |
*Compared with children who were alive 365 days after birth.
†Compared with children born from 37+0–41+6.
aRR, risk ratio adjusted for maternal age, maternal country of origin and maternal year of birth; RR, crude risk ratio; SGA, small-for-gestational age.