title: Wilms tumour and paternal occupation: an analysis of data from the National Registry of Childhood Tumours.
abstract: BACKGROUND
  Wilms tumour is an embryonal malignant tumour that accounts for 90% of childhood kidney cancers. Parental occupational exposure has been hypothesised to be a cause of childhood Wilms tumour, in particular exposure to pesticides. However, the findings are inconsistent.
  
  
  METHODS
  We have examined the association between paternal occupational exposures and Wilms tumour using birth registration data for cases (n = 2568) from the National Registry of Childhood Tumours (NRCT) and matched controls (n = 2,568) drawn from the general population of Great Britain. Paternal occupation, as recorded at the time of birth, was used to infer "occupational exposure" using a previously defined occupational exposure classification scheme. Odds ratios and 95% confidence intervals were generated using conditional logistic regression with exact methods to estimate the association between each paternal occupational exposure group and childhood Wilms tumour.
  
  
  RESULTS
  All odds ratios were close to 1.00 and no statistically significant associations were observed.
  
  
  CONCLUSIONS
  The results of this study failed to support any of the previously identified associations between paternal occupation and childhood Wilms tumour.
authors.affiliation: Academic Centre for Defence Mental Health, King's College London, Institute of Psychiatry, Weston Education Centre, London, United Kingdom. nicola.fear@iop.kcl.ac.uk
authors.forename: N T
authors.initials: NT
authors.lastname: Fear
authors.forename: T J
authors.initials: TJ
authors.lastname: Vincent
authors.forename: J C
authors.initials: JC
authors.lastname: King
authors.forename: A
authors.initials: A
authors.lastname: MacCarthy
authors.forename: K J
authors.initials: KJ
authors.lastname: Bunch
authors.forename: M F G
authors.initials: MF
authors.lastname: Murphy