Characteristic
All (n=81) Missing data n (%)
Age (years) 29.5 (9) 3 (3.7)
Ethnicity n (%) White Asian Black Other 68 (88.3) 6 (7.9) 2 (2.6) 1 (1.3)
4 (4.9)
BMI (kg/m2) 26.3 (7.0) 8 (9.9)
Paid employment n (%) Yes No 47 (69.1) 21 (30.9)
13 (16.0)
Smoking status n (%) Never Stopped pre- pregnancy Stopped during pregnancy Current 53 (74.6) 6 (8.4) 6 (8.4) 6 (8.4)
2 (2.5)
Nulliparity n (%) 43 (53.1) 1 (1.2)
Assisted conception n (%) 6 (7.4) 2 (2.5)
Gestation at first sIUFD (days) 157 (52) 0 (0)
Presumed aetiology of sIUFD n (%) Spontaneous TTTS sIUGR Congenital/structural anomaly Unclear 22 (27.1) 38 (46.9) 5 (6.1) 12 (14.8) 4 (5)
0 (0)