title: Prediction of contralateral inguinal hernias in children: a prospective study of 357 unilateral inguinal hernias.
abstract: OBJECTIVE
  Previously, we established a pre-operative risk scoring system to predict contralateral inguinal hernia in children with unilateral inguinal hernias. The current study aimed to verify the usefulness of our pre-operative scoring system.
  
  
  METHODS
  This was a prospective study of patients undergoing unilateral inguinal hernia repair from 2006 to 2009 at a single institution. Gender, age at initial operation, birth weight, initial operation side, and the pre-operative risk score were recorded. We analyzed the incidence of contralateral inguinal hernia, risk factors, and the usefulness of our pre-operative risk scoring system. The follow-up period was 36 months. We used forward multiple logistic regression analysis to predict contralateral hernia.
  
  
  RESULTS
  Of the 372 patients who underwent unilateral hernia repair, 357 (96.0 %) were completely followed-up for 36 months, and 23 patients (6.4 %) developed a contralateral hernia. Left-sided hernia (OR = 5.5, 95 %, CI = 1.3-24.3, p = 0.023) was associated with an increased risk of contralateral hernia. The following covariates were not associated with contralateral hernia development: gender (p = 0.702), age (p = 0.215), and birth weight (p = 0.301). The pre-operative risk score (cut-off point = 4.5) of the patients with a contralateral hernia was significantly higher, compared with the patients without a contralateral hernia using the area under the receiver operating characteristic curve (p = 0.024).
  
  
  CONCLUSIONS
  Using multivariate analysis, we confirmed usefulness of our pre-operative scoring system and initial side of the inguinal hernia, together, for the prediction of contralateral inguinal hernia in children.
authors: Department of Pediatric Surgery, Nihon University School of Medicine, 30-1, Ohyaguchikami-cho, Itabashi-ku, Tokyo, 173-8610, Japan.
authors: M
authors: M
authors: Hoshino
authors: K
authors: K
authors: Sugito
authors: H
authors: H
authors: Kawashima
authors: S
authors: S
authors: Goto
authors: H
authors: H
authors: Kaneda
authors: T
authors: T
authors: Furuya
authors: T
authors: T
authors: Hosoda
authors: T
authors: T
authors: Masuko
authors: K
authors: K
authors: Ohashi
authors: M
authors: M
authors: Inoue
authors: T
authors: T
authors: Ikeda
authors: R
authors: R
authors: Tomita
authors: T
authors: T
authors: Koshinaga
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006305:Health Status Indicators; D006552:Hernia, Inguinal / Q000175:diagnosis / Q000453:epidemiology* / Q000601:surgery; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D015999:Multivariate Analysis; D011446:Prospective Studies; D012307:Risk Factors; D014041:Tokyo / Q000453:epidemiology
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