Table 4 Preterm birth clinic referral criteria
Referral criteria (non-exclusive) | Number of clinics (%) n = 38 a |
|---|---|
Previous spontaneous preterm birth | 38 (100) |
  < 37 weeks | 6 (16) |
  < 35 weeks | 2 (5) |
  < 34 weeks | 20 (53) |
  < 32 weeks | 4 (11) |
  < 28 weeks | 1 (3) |
 Other | 1 (3) |
 No gestational limit reported | 4 (11) |
Previous late miscarriage/mid-trimester loss | 34 (89) b |
  ≥ 16 weeks | 2 (5) |
 No gestational limit reported | 32 (84) |
Previous PPROM | 30 (79) |
  < 37 weeks | 5 (13) |
  < 34 weeks | 17 (45) |
  < 32 weeks | 4 (11) |
  < 28 weeks | 2 (5) |
 Other | 1 (3) |
 No gestational limit reported | 1 (3) |
Previous cervical surgery (non-exclusive) | 33 (87) |
 1 LLETZ or no number stated | 16 (42) |
  ≥ 2 LLETZ | 32 (84) |
 Knife cone biopsy | 33 (87) |
 Not further defined | 1 (3) |
Other gynaecological procedures (non-exclusive) | 1 (3) |
  ≥ 3 Surgical termination of pregnancy | 1 (3) |
  ≥ 4 Dilatation and curettage | 1 (3) |
Previous cervical cerclage | 1 (3) |
Uterine abnormality/malformation | 27 (71) |
Short cervix in current pregnancy | 31 (82) |
  < 25 mm | 1 (3) |
  < 3rd centile for gestation | 1 (3) |
  ‘Short’ cervix not further defined | 29 (76) |
Follow up for threatened preterm labour | 4 (11) |
Previous stillbirth or neonatal death | 1 (3) |
Autoimmune conditions | 1 (3) |
Placental risk factors | 1 (3) |
Multiple pregnancy | 0 (0) |