Skip to main content

Table 1 Characteristics of responders by number (n) and percentage (%) of total ultrasound units (n = 38 units)

From: Adherence to Swedish national pregnancy dating guidelines and management of discrepancies between pregnancy dating methods: a survey study

Characteristics (n) (%)
Position of responder
 Head of department 6 15.8
 Physician in charge of ultrasound unit 21 55.3
 Midwife in charge of ultrasound unit 6 15.8
 Other specified position 4 10.5
 Missing 1 2.6
Type of unit
 University hospital 6 15.8
 Regional hospital 20 52.6
 Private unit 6 15.8
 Other or mixed 6 15.8
Second-trimester ultrasound examinations per year
 <500 1 2.6
 500 to 1499 7 18.4
 1500 to 2499 10 26.3
 2500 to 3499 12 31.6
 ≥3500 8 21.1
First-trimester ultrasound examinations offered in unita
 <11 weeks on woman’s request 3 7.9
 <11 weeks on indication 7 18.4
 Week 11 to 14 for all women 9 23.7
 Week 11 to 14 only for specified groups in the context of chromosomal screening 16 42.1
 Week 11 to 14 for all women in the context of chromosomal screening 16 42.1
BPD measurements for pregnancy dating in the unit
 BPD 21–55 mm 33 86.8
 BPD 32–55 mm 2 5.3
 BPD and FL combined 2 5.3
 Missing 1 2.6
CRL measurements for pregnancy dating in the unit
 Never been practiced 13 34.2
 Previously performed but currently only BPD-based 6 15.8
 Limited to CRL ≥45 mm and BPD ≤21 mm 11 28.9
 Limited to measurements of 45–85 mm 2 5.3
 Other, such as occasional use 4 10.5
 Missing 2 5.3
Gestational age at EDD
 39 weeks + 6 days 30 78.9
 40 weeks + 0 days 5 13.2
 Uncertain 2 5.3
 Missing 1 2.6
  1. BPD biparietal diameter, CRL crown–rump length, EDD estimated day of delivery, FL femur length
  2. aMore than one alternative could be marked