ID Number		629
Study Type		Epidemiology
Model		900 MHz (GSM) exposure to humans and analysis of subjective symptoms
Details		Human volunteers (in a largely Bishan community of Singapore) were asked about general health, headaches, CNS function (dizzyness, memory loss, etc), and cell phone use. The authors state that after corrections were made for age, sex, ethnic group, use of VDTs, and occupational group using a proportional hazzards model, a significant prevalence of headache was associated with duration in minutes of cell phone use per day.
Findings		Effects (poor study design)
Status		Completed With Publication
Principal Investigator		Nat'l University Singapore, Singapore - cofcse@nus.edu.sp
Funding Agency		Private/Instit.
Country		SINGAPORE
References		Chia, SE et al. Environ Health Perspect, (2000) 108:1059-1062 Chia, SE et al. BMJ, (2000) 321:1155-1156
Comments		Subjects knew before the questionaire that the investigators were studying correlations between headaches and factors in the community, but were not told specifically that correlations with cellular telephone use was being investigated (although the cell phone history was obviously included in the questionaire). Further, methods for correcting for all possible confounding factors was not described in detail. No dose response was reported or even attempted.