Epidemiological study (observational study)

Cellular telephone use and risk of intratemporal facial nerve tumor epidem.

By: Warren HG, Prevatt AA, Daly KA, Antonelli PJ

Published in: Laryngoscope 2003; 113 (4): 663-667

Aim of study (acc. to author)

A case-control study was conducted in the USA to investigate the possible assciation between cellular phone use and the risk of intratemporal facial nerve tumor.

Further details

Regular use of a cellular telephone was defined as at least one call per week.

Endpoint/type of risk estimation

intratemporal facial nerve tumor

Type of risk estimation:

incidence

(odds ratio (OR))

Exposure

- mobile communications
- analog mobile phone
- digital mobile phone
- cordless phone
- personal

Assessment

interview: use of cellular phone and cordless phone, average minutes/day, duration of call, number of calls/week, minutes/month, area of use (urban, suburban or rural), preferred ear of use

Exposure groups

Group	Description
Reference group 1	not exposed
Group 2	use of cellular telephone
Group 3	use of cordless telephone

Population

Group:
- men
- women
Age: ≥ 18 years
Observation period: July 1995 - July 2000
Study location: USA (Department of Otolaryngology, University of Florida)

Case group

Characteristics: intratemporal facial nerve tumor
Data source: fiscal database of hospital

Control group

non-tumor control: rhinosinusitis, dysphonia or reflux; tumor control: acoustic neuroma
Selection:
- hospital-based
Matching:
- sex
- ethnicity
- 6-years age group
- case:control = 1:12

Study size

	Cases	Controls
Participants	18	192

Statistical analysis method:

unconditional logistic regression

Results (acc. to author)

Regular use of cellular telephones was reported by two patients and 42 controls.
No association between regular use of cellular phones and the risk for intratemporal facial nerve tumor was observed.

Limitations (acc. to author)

The number of patients included in the study was very small. The observation time was too short to evaluate the risk for potentially long tumor latency periods.

Study funded by

not stated/no funding

Bortkiewicz A et al. (2017): Mobile phone use and risk for intracranial tumors and salivary gland tumors - a meta-analysis
Prasad M et al. (2017): Mobile phone use and risk of brain tumours: a systematic review of association between study quality, source of funding, and research outcomes
Lagorio S et al. (2014): Mobile phone use and risk of intracranial tumors: A consistency analysis
Myung SK et al. (2009): Mobile phone use and risk of tumors: a meta-analysis
Auvinen A et al. (2002): Brain tumors and salivary gland cancers among cellular telephone users
Muscat JE et al. (2002): Handheld cellular telephones and risk of acoustic neuroma
Inskip PD et al. (2001): Cellular-telephone use and brain tumors
Muscat JE et al. (2000): Handheld cellular telephone use and risk of brain cancer
Hardell L et al. (1999): Use of cellular telephones and the risk for brain tumours: A case-control study

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