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Letters Mobile phones and glioma risk

Authors’ reply to Kundi and Davis and colleagues

BMJ 2012; 344 doi: (Published 01 May 2012) Cite this as: BMJ 2012;344:e3088
  1. M P Little, senior scientist1,
  2. P Rajaraman, investigator1,
  3. R E Curtis, research statistician1,
  4. S S Devesa, contractor1,
  5. P D Inskip, senior investigator1,
  6. D P Check, programmer1,
  7. M S Linet, senior investigator1
  1. 1National Cancer Institute, Rockville, MD 20852-7238, USA
  1. mark.little{at}

We clearly state in the statistical methods that, while the figures are based on a specific reference group (men aged 60-64, Los Angeles registry), the entire dataset was used to estimate these rates.1 2 3 The reference group was chosen purely for statistical reasons, to minimise the variance of estimates: choosing a different group …

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