Table 1 Demographic characteristics of samples from live births and stillbirths from known and unknown causes. Birthweight was significantly lower in stillbirths from FGR and hypertension than live births (P < 0.01); all other variables did not significantly differ between groups. Data are presented as median with range in parentheses except for estimated time of retention in utero where number of cases are presented

10

7

8

5

8

9

10

10

32 (28–37)

27 (18–41)

28 (21–36)

34 (31–40)

33 (27–37)

30 (25–32)

30 (22–32)

28 (21–31)

1 (1–5)

3 (1–6)

1 (1–1)

4 (2–7)

1 (1–2)

1 (1–3)

1 (1–4)

1 (1–2)

0 (0–4)

0 (0–4)

0 (0–0)

1 (1–2)

0 (0–0)

0 (0–2)

0 (0–2)

0 (0–0)

37 (37–38)

31 (26–36)

30 (27–38)

28 (28–40)

31 (26–35)

38 (24–41)

34 (26–38)

31 (27–39)

3090 (2805–3430)

1821 (786–2760)

1300 (702–2750)

3120 (1473–3590)

1110 (399–1730)

2680 (494–2985)

1065 (564–2230)

2170 (892–3150)

Estimated in utero retention time

0 h - <24 h

N/A

N/A

0

1

4

4

2

2

≥24 h - < 48 h

1

0

2

2

4

3

≥48 h - < 96 h

2

1

0

2

2

1

≥96 h - <1 week

3

1

1

0

0

2

≥1 week

2

2

1

1

2

2