ELF Electric field studies: These are few, only four in fact. The earliest was by Savitz, Wachtel et al, in 1987 (Am J Epidemiol) as part of the New York PowerLine Public Enquiry. David Savitz , from N. Carolina University rechecked the original 1979 Denver study by Nancy Wertheimer which only used wire codes, but still found an elevated incidence, a paper which shocked the scientific world at that time, hence the Savitz replication. Savitz revisited Denver using a different set of children and time periods, and additionally tried to collect E-field measurement data but gave up on the basis that his study design did not permit assessment of chronic exposure. Nevertheless the analysis of his partial E field data capture showed a near two fold elevation of childhood leukaemia, as did the wire code replication. He found the elevation commenced at around 212 nT. and above 11 V/m.
There was then a study by Univ. of South California by Stephanie London and colleagues which collected spot E field measurements but for some reason did not report them. After that we did the world's largest E-field study at that time (despite attempted obstruction by the UKCCCR who threatened any health authority which helped us with a cut off of funding) and published the results in 1996 (Europ. J Cancer Prevention) showing a five fold elevation when a 20V/m cut off was used and a clear dose response relationship with good confidence intervals.
The statistics on our data were performed by the senior statistician of Gwent health Authority who subsequently lost his job and was moved sideways. It was however a relatively small study with only 56 leukaemia cases and 56 controls, and we asked for a larger study to be done. Just after then a very large occupational study of ELF EM fields exposure (Theriault et al. from McGill University) reported an even larger OR , but only when electric fields were added to the magnetic measurements. The data was immediately confiscated by the utilities who funded this Canadian study and prevented them from any further analysis for several years. (Gilles Theriault managed to give me a copy of the printouts before they were removed). When the NCI came to do their own study (Linet et al) they omitted the electric field on the grounds that there was not enough support for thinking there might be a risk! You can find all these references in the scientific studies database on our website, which allows searches by individual author and any keyword appearing in the title. They are also all in Entrez Pubmed.
There was then a study by Univ. of South California by Stephanie London and colleagues which collected spot E field measurements but for some reason did not report them. After that we did the world's largest E-field study at that time (despite attempted obstruction by the UKCCCR who threatened any health authority which helped us with a cut off of funding) and published the results in 1996 (Europ. J Cancer Prevention) showing a five fold elevation when a 20V/m cut off was used and a clear dose response relationship with good confidence intervals.
The statistics on our data were performed by the senior statistician of Gwent health Authority who subsequently lost his job and was moved sideways. It was however a relatively small study with only 56 leukaemia cases and 56 controls, and we asked for a larger study to be done. Just after then a very large occupational study of ELF EM fields exposure (Theriault et al. from McGill University) reported an even larger OR , but only when electric fields were added to the magnetic measurements. The data was immediately confiscated by the utilities who funded this Canadian study and prevented them from any further analysis for several years. (Gilles Theriault managed to give me a copy of the printouts before they were removed). When the NCI came to do their own study (Linet et al) they omitted the electric field on the grounds that there was not enough support for thinking there might be a risk! You can find all these references in the scientific studies database on our website, which allows searches by individual author and any keyword appearing in the title. They are also all in Entrez Pubmed.