Table 1

Maternal characteristics and obstetric care

Twin pregnancies (N=1859)Singleton pregnancies (N=117 593)
Maternal characteristics
 Maternal Age (median, IQR)29 (24–34)26 (22–32)
  Missing071
 Primigravid405 (21.8%)42 385 (36.1%)
 Grand multip (>4 prior pregnancies)280 (15.1%)12 369 (10.5%)
  Missing3391
 Low maternal education (completed a none or primary only)167 (9.2%)8624 (7.5%)
  Missing552934
 Botswana citizen1761 (94.7%)113 386 (96.4%)
 Non-citizen89 (4.79%)3674 (3.12%)
  Missing9400
 HIV infected562 (30.5%)28 264 (24.2%)
  Missing17934
Obstetric care
 Antenatal care visits (median, IQR)9 (6–12)10 (7–12)
  Missing (%)21 (1.1%)1112 (1.0%)
 Ultrasound
 Total with ultrasound during pregnancy*980/1248 (78.5%)52,012/77786 (66.9%)
 Median gestational age at ultrasound25 (19, 31)27 (20, 33)
 Ultrasound scan <20 weeks gestation243/1199 (20.3%)10706/73522 (14.6%)
  Missing ultrasound date494264
 Delivered in tertiary hospital1019 (54.8%)53 040 (45.1%)
  Missing01
 Caesarean section1015 (54.6%)25 887 (22.0%)
  Missing method of delivery02
  • *Captured in Tsepamo beginning 31 March 2016