Symphysis-fundus measurements for detection of small for gestational age pregnancies
2006 (English)In: Acta Obstetricia et Gynecologica Scandinavica, ISSN 0001-6349, E-ISSN 1600-0412, Vol. 85, no 4, 407-12 p.Article in journal (Refereed) Published
Background. In Sweden measurements of the symphysis-fundus (SF) distance are used to detect small for gestational age (SGA) pregnancies. The aim of this study was to evaluate the efficiency of Swedish ultrasound-based SF reference curves in detecting SGA pregnancies. Methods. To assess the sensitivity for detection of SGA pregnancies we performed a case-control study. Through the Swedish Medical Birth Register we identified all singelton SGA infants born in Uppsala 1993-1997 and randomly recruited non-SGA singelton as controls. We included 169 term and 73 preterm SGA cases and 296 controls, all born at term. The reference curves constructed from Steingrimsdottir (S curve) and Kieler (K curve) were evaluated. Gestational age at first alarm in the preterm SGA group was recorded. Results. In term pregnancies the S curve showed a sensitivity of 32 % and a specificity of 90 % at a cut-off at -2 SDs. The corresponding values for the K curve were 51 % and 83 %, respectively. In preterm pregnancies the sensitivity of the S curve was 49 % and for the K curve 58 %. The first alarm below -2 SD was noted before 32 weeks in 37 % with the S curve and 43 % with the K curve for preterm pregnancies. Conclusions. Both tested Swedish reference curves had low sensitivity for term SGA pregnancies. Sensitivity was higher for the preterm group and SF measurements seem to be better for detecting the most severe cases of SGA.
Place, publisher, year, edition, pages
2006. Vol. 85, no 4, 407-12 p.
Obstetrics, Gynecology and Reproductive Medicine
Research subject Obstetrics and Gynaecology
IdentifiersURN: urn:nbn:se:uu:diva-81985PubMedID: 16612701OAI: oai:DiVA.org:uu-81985DiVA: diva2:109900
ProjectsSymphysis Fundus Measurements for Detection of Intrauterine Growth Restriction