title: [Application of a technique to establish criteria for uterine length measurement].
abstract: BACKGROUND
  The uterine length measurement is a routine practice in the prenatal care of pregnant women. It has been attributed a sensibility of 86% to detect fetal grown restriction. The technique is easy to perform and reproducible between observers, although we have found variation between intra- and inter-observers measurements.
  
  
  OBJECTIVE
  To evaluate the useful of a maneuver to improve the reliability of the uterine length measurement in a group of obstetrics residents.
  
  
  METHODS
  The measurement was performed on pregnant women. The results were analyzed by intraclass correlation coefficient to evaluate the concordance between observers based in a variance analysis model (ANOVA) of repeated measurements.
  
  
  RESULTS
  There were not differences between groups about demographic variables. All residents improve the reliability in their measurements. The intra-class correlation coefficient was 0.77 (confidence interval 0.63-0.88) before the maneuver, and after this one the intra-class correlation coefficient improved to 0.96 (confidence interval 0.92-0.98).
  
  
  CONCLUSIONS
  The uterine measurement following detailed indications improve the interobserver concordance. We think it is advisable to evaluate the use of this maneuver in a routine way in our institute and in other places that bring prenatal care.
authors.affiliation: Instituto Nacional de Perinatología. draacevedo_sandra@yahoo.com.mx
authors.forename: Sandra
authors.initials: S
authors.lastname: Acevedo Gallegos
authors.forename: Mario Estanislao
authors.initials: ME
authors.lastname: Guzmán Huerta
authors.forename: Berenice
authors.initials: B
authors.lastname: Velázquez Torres
authors.forename: Juan Manuel
authors.initials: JM
authors.lastname: Gallardo Gaona
authors.forename: Lucía Angélica
authors.initials: LA
authors.lastname: Sarmiento Sánchez
mesh_terms: D000293:Adolescent; D000328:Adult; D000886:Anthropometry / Q000379:methods; D003944:Diagnostic Techniques, Obstetrical and Gynecological / Q000592:standards; D005260:Female; D006801:Humans; D014599:Uterus / Q000033:anatomy & histology*