Open AccessTHE PRECISION AND ACCURACY OF SYMPHYSIS‐FUNDUS DISTANCE MEASUREMENTS DURING PREGNANCY
Author(s) -
Bagger Peter V.,
Eriksen Poul Sindberg,
Secher Niels Jørgen,
Thisted JØRgen,
Westergaard Lars
Publication year - 1985
Publication title -
acta obstetricia et gynecologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 102
eISSN - 1600-0412
pISSN - 0001-6349
DOI - 10.3109/00016348509155150
Subject(s) - medicine , symphysis , ultrasound , fundus (uterus) , nuclear medicine , accuracy and precision , ophthalmology , surgery , radiology , statistics , mathematics
. We studied the precision and accuracy of SF measurements. Five trained obstetricians made three measurements of SF on each of 33 patients in the third trimester. The intraobserver variation varied from 0 cm to 8 cm, and comprised on average 1.5 to 2 cm (95th centiles 2.5 to 4 cm). The interobserver variation varied from 1 to 13 cm, and comprised on average 4 cm (95th centile 8 cm). The accuracy of SF measurements was estimated by comparison with ultrasound‐guided measurements, which showed a very high precision. Two of the investigators differed significantly, by −1.56 cm and −1.97 cm, from the other 3.