title: Surgery for otitis media and infectious susceptibility in 10-year old school children.
abstract: OBJECTIVE
  Assess infectious susceptibility in children previously operated for otitis media and evaluate reliability of parental reported otitis media surgery in the same group of children.
  
  
  METHODS
  Population based, cross-sectional survey of 10-year olds in the city of Oslo, Norway studying otitis media and surgical intervention in n=3406 with reliability assessments in a subset of n=2027.
  
  
  RESULTS
  Ten percent of children had otitis media surgery. Peak age was 2.5 years for adenoidectomy and tympanostomy tubes and 3 years for myringotomy. The crude odds ratio (cOR) with 95% confidence interval (95% CI) for one or more episodes of otitis media at 10 years in children with previous otitis media surgery was 3.4 (2.7-4.4). Intervention after the child was 4 years increased the risk further, crude odds ratio 4.2 (2.9-6.1). Kappa coefficients for agreement in answers to questions on otitis media surgery performed in children between 0 and 4 years were 0.9 for adenoidectomy, 1.0 for tympanostomy tubes, and 0.6 for myringotomy.
  
  
  CONCLUSIONS
  Otitis media in 10-year old children was associated with previous surgical intervention, particularly when performed after 4 years of age. Parental reports of tympanostomy tubes and adenoidectomy in early childhood were found reliable.
authors.affiliation: Faculty Division of Akershus University Hospital, University of Oslo, Norway. gunnhild.karevold.@medisin.uio.no
authors.forename: Gunnhild
authors.initials: G
authors.lastname: Karevold
authors.forename: Yngvild E
authors.initials: YE
authors.lastname: Bentdal
authors.forename: Per
authors.initials: P
authors.lastname: Nafstad
authors.forename: Kari Jorunn
authors.initials: KJ
authors.lastname: Kvaerner
mesh_terms: D000233:Adenoidectomy / Q000009:adverse effects*; D002648:Child; D016001:Confidence Intervals; D003430:Cross-Sectional Studies; D004522:Educational Status; D005260:Female; D006801:Humans; D008876:Middle Ear Ventilation / Q000009:adverse effects*; D015999:Multivariate Analysis; D009664:Norway; D016017:Odds Ratio; D010033:Otitis Media / Q000517:prevention & control*; D010290:Parents; D015203:Reproducibility of Results; D012306:Risk; D011795:Surveys and Questionnaires; D016896:Treatment Outcome