| Baseline characteristics |
N=138 |
| Age in years, mean (SD) |
31 (4.3) |
| Native country, N (%) |
|
| Netherlands |
130 (94.2) |
Other
Gravidity N (%) |
8 (5.8) |
| First pregnancy |
60 (43.5) |
| Second pregnancy or more |
76 (55.1) |
| Gestational age(weeks), mean (SD) |
23 (3.9) |
| Gestational age at time responding N (%) |
|
| Before anomaly scan |
8 (5.8) |
| After anomaly scan and < 32 weeks gest. |
121 (87.7) |
| ≥ 32 weeks of gestation |
7 (5.1) |
| Previous vaginal examination N (%) |
|
| No previous vaginal examination |
26 (20.3) |
| Discomfort/pain during previous examination |
30 (21.7) |
| Cervical length measurement N (%) |
|
| Agreed |
65 (47.1) |
| Refused |
49 (35.5) |
| Unknown/ not offered |
24 (17.4) |
| Previous child needed extra care, N (%) |
12 (8.7) |
| Antenatal care provider, N (%) |
|
| Primary care midwife |
104 (75.4) |
| Obstetrician in secondary/tertiary care |
28 (20.3) |
| Other/ unknown |
6 (4.3) |
