Table 4.
Risk of Adverse Pregnancy Outcomes in Adolescent Pregnancy Stratified by Parity
| Outcomes | Nulliparous (n = 3328) | Multiparous (n = 350) | ||
|---|---|---|---|---|
| RR (95%CI) | aRR (95%CI) | RR (95%CI) | aRR (95%CI) | |
| Cesarean delivery | 0.73 (0.68–0.78)*** | 0.69 (0.65–0.75)*** | 0.55 (0.44–0.68)*** | 0.76 (0.57–1.02) |
| Anemia | 1.08 (1.00–1.17) | 1.10 (1.02–1.20)* | 0.80 (0.63–1.02) | 0.86 (0.67–1.10) |
| Gestational diabetes mellitus | 0.36 (0.27–0.48)*** | 0.59 (0.44–0.79)*** | 0.25 (0.08–0.77)* | 0.37 (0.12–1.16) |
| Pre-eclampsia | 1.08 (0.87–1.33) | 0.98 (0.79–1.21) | 0.39 (0.12–1.20)* | 0.46 (0.15–1.43) |
| HELLP syndrome | 2.00 (0.66–6.06) | 2.58 (0.96–6.90) | – | – |
| Placenta previa | 0.50 (0.19–1.35) | 0.76 (0.28–1.07) | 1.49 (0.48–4.66) | 2.60 (0.81–8.33) |
| Placental abruption | 1.41 (0.77–2.57) | 1.44 (0.77–2.69) | – | – |
| Postpartum hemorrhage | 1.10 (0.61–2.01) | 1.39 (0.75–2.58) | – | – |
| Maternal death | 9.57 (1.07–85.68)* | 2.14 (0.14–31.82) | – | – |
| Preterm delivery | 1.56 (1.37–1.77)*** | 1.67 (1.45–1.92)*** | 1.16 (0.75–1.79) | 1.34 (0.84–2.14) |
| Small for gestational age | 1.27 (1.15–1.39)*** | 1.22 (1.11–1.35)*** | 0.78 (0.54–1.12) | 0.72 (0.49–1.05) |
| Low Apgar at 5 min | 1.75 (0.98–3.12) | 1.57 (0.86–2.86) | – | – |
| Stillbirth | 3.83 (2.74–5.36)*** | 2.55 (1.76–3.71)*** | 2.15 (0.69–6.71) | 2.00 (0.64–6.31) |
| Neonatal death | 2.80 (1.71–4.59)*** | 2.72 (1.61–4.61)*** | 1.42 (0.20–10.12) | 1.57 (0.22–11.26) |
Adjusted by maternal education, marital status, delivery place, history of miscarriage, previous cesarean delivery. Women aged 20–34 years as the reference group. *P < 0.05, **P < 0.01, ***P < 0.001