Letters

Hair lead studies were excluded

BMJ 1995; 310 doi: https://doi.org/10.1136/bmj.310.6976.397c (Published 11 February 1995) Cite this as: BMJ 1995;310:397
  1. Guy Huel,
  2. Dave Campagna,
  3. Thierry Moreau,
  4. Pascale Tubert-Bitter
  1. Director of research Research fellow Director of research Researcher Epidemiological Research Unit, National Institute for Health and Medical Research, 94807 Villejuif, France

    EDITOR,—In their meta-analysis to measure the magnitude of the relation between IQ in children aged >/=5 and the body burden of lead Stuart J Pocock and colleagues excluded studies that used hair lead because “it is recognised as an unreliable measure of body burden.”1 The idea that hair is not a reliable indicator comes mainly from the possibillity of exogenous contamination of hair and the fact that most studies have shown no or weak links between blood lead concentration and hair lead content. We showed that exogenous …

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