Mobile phone use and risk of brain tumours: a systematic review
of association between study quality, source of funding,
and research outcomes

Conclusion
In our review of the literature and meta-analysis of case–
control studies, we found evidence linking mobile phone
use and risk of brain tumours especially in long-term users
([10 years). We also found a significantly positive correlation
between study quality and outcome in the form of
risk of brain tumour associated with use of mobile phones.
Higher quality studies show a statistically significant
association between mobile phone use and risk of brain
tumour. Even the source of funding was found to affect the
quality of results produced by the studies. As mobile phone
use certainly continues, our findings are pertinent to warrant
application of precautionary measures aimed at
reducing its adverse effects. Furthermore, well-designed
studies embedded with prospective cohorts are required to
provide a higher level of evidence.
Acknowledgements The authors would like to thank All India
Institute of Medical Sciences for providing us the resources for
conducting the meta-analysis successfully.