Study type: Epidemiological study (observational study)

Increasing incidence of brain and nervous tumours in urban Shanghai, China, 1983-2007. epidem.

Published in: Asian Pac J Cancer Prev 2011; 12 (12): 3319-3322

Aim of study (acc. to author)

The time trends in the incidence were investigated to evaluate whether trends in the incidence of brain and nervous system tumors changed in urban Shanghai, China, from 1983 to 2007, before and after introduction of mobile phones.

Endpoint/type of risk estimation

Type of risk estimation: (standardized incidence rate (SIR))

Exposure

Population

Study size

Type Value
Total 6,000,000
Statistical analysis method:

Conclusion (acc. to author)

The age-adjusted incidence rate of brain tumors and nervous system tumors increased gradually by 1.2% per year (CI 0.4-1.9%) among men and 2.8% per year (CI 2.1-3.4%) among women from 1983 to 2007. Age-adjusted incidences of brain tumors and nervous system tumors in urban Shanghai for 2020 were estimated to 7.4 and 10.9 per 100,000 person-years.
The authors concluded that the study did not support an association between cellular telephone use and increased risk of brain tumors and nervous system tumors. However, considering of the increasing incidence rate of brain and nervous system tumors in addition to the high prevalence of mobile phone exposure, assessment of longer follow-up time trends in incidence rates is warranted.

Study funded by

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