Taiwan results are not includedBMJ 1995; 310 doi: https://doi.org/10.1136/bmj.310.6976.397b (Published 11 February 1995) Cite this as: BMJ 1995;310:397
- Michael B Rabinowitz
- Associate scientist Marine Biological Laboratory, Woods Hole, MA 02543, USA
EDITOR,—Stuart J Pocock and colleagues' systematic review of recent studies of environmental lead and children's intelligence1 does not include a cross sectional study from Taiwan.2 This may be because the study's outcome measure was the score in Raven's coloured progressive matrices test rather than the score on the more commonly used Wechsler intelligence scale for children. As an author of the study in Taiwan I have reanalysed our data, using an appropriate IQ score for each value in the coloured progressive matrices test.