Table 4.
Neonatal outcomes according to age group
| Maternal age in years |
|||||
|---|---|---|---|---|---|
| 13–15 | 16–17 | 18–19 | All teenagers | 25–29 | |
| N | 84 | 1234 | 5987 | 7305 | 51 142 |
| Extremely preterm <28 wM3 | |||||
| n (%) | 2 (2.4) | 3 (0.2) | 23 (0.4) | 28 (0.4) | 149 (0.3) |
| OR (95% CI) | 8.5 (2.1 to 35.1) | 0.8 (0.3 to 2.7) | 1.3 (0.9 to 2.1) | 1.3 (0.9 to 2.0) | |
| Adjusted OR (95% CI) | 5.4 (0.7 to 41.5) | 0.3 (0.0 to 2.4) | 1.1 (0.6 to 1.9) | 1.0 (0.6 to 1.7) | 1 (Ref.) |
| Preterm <37 wM2 | |||||
| n (%) | 11 (13.1) | 68 (5.5) | 296 (4.9) | 375 (5.1) | 2440 (4.8) |
| OR (95% CI) | 3.0 (1.6 to 5.7) | 1.1 (0.9 to 1.5) | 1.0 (0.9 to 1.2) | 1.1 (1.0 to 1.2) | |
| Adjusted OR (95% CI) | 2.5 (1.2 to 5.3) | 1.0 (0.8 to 1.4) | 0.9 (0.8 to 1.1) | 1.0 (0.8 to 1.1) | 1 (Ref.) |
| SGAM1 | |||||
| n (%) | 2 (2.4) | 52 (4.2) | 199 (3.3) | 253 (3.5) | 1262 (2.5) |
| OR (95% CI) | 0.9 (0.2 to 3.5) | 1.7 (1.3 to 2.3) | 1.4 (1.2 to 1.6) | 1.4 (1.2 to 1.6) | |
| Adjusted OR (95% CI) | 0.5 (0.1 to 2.1) | 1.2 (0.9 to 1.6) | 1.0 (0.8 to 1.1) | 1.0 (0.8 to 1.2) | 1 (Ref.) |
| Intensive careM4 | |||||
| n (%) | 19 (22.6) | 138 (11.2) | 654 (10.9) | 811 (11.1) | 5566 (10.9) |
| OR (95% CI) | 2.4 (1.4 to 4.0) | 1.0 (0.9 to 1.2) | 1.0 (0.9 to 1.1) | 1.0 (0.9 to 1.1) | |
| Adjusted OR (95% CI) | 1.9 (1.0 to 3.4) | 0.9 (0.7 to 1.1) | 0.9 (0.8 to 1.0) | 0.9 (0.8 to 1.0) | 1 (Ref.) |
| Stillbirth/neonatal deathM5 | |||||
| n (%) | 2 (2.4) | 4 (0.3) | 34 (0.6) | 40 (0.5) | 180 (0.4) |
| OR (95% CI) | 6.9 (1.7 to 28.3) | 0.9 (0.3 to 2.5) | 1.6 (1.1 to 2.3) | 1.6 (1.1 to 2.2) | |
| Adjusted OR (95% CI) | 0.4 (0.0 to 5.1)M6 | 0.6 (0.1 to 2.7) | 1.4 (0.8 to 2.4) | 1.2 (0.7 to 2.1) | 1 (Ref.) |
All the variables are adjusted according to multivariate models:
M1: Demographic variables (table 1—history of spontaneous abortions)+adequacy of prenatal care, gestational diabetes, PIH, placental abruption, chorioamnionitis, pre-eclampsia, eclampsia.
M2: M1+anaemia+history of spontaneous abortions.
M3: M2—misuse of alcohol or drugs.
M4: M1+preterm birth and IUGR.
M5: M4—(misuse of alcohol or drugs and pre-existing hypertension).
M6: M5—(BMI and pre-existing diabetes).
BMI, body mass index; PIH, pregnancy-induced hypertension; SGA, small-for-gestational-age.