Study type: Epidemiological study (observational study)

Asymmetries in hip mineralization in mobile cellular phone users. epidem.

Published in: J Craniofac Surg 2011; 22 (2): 706-710

Exposure

No exposure details are available.

Aim of study (acc. to author)

A cross-sectional study was conducted in Argentina to study differences in bone mineralization in the right and left hip of healthy male adult mobile phone and non-mobile phone users.

Further details

Many people, particularly men, often carry their mobile phones on a side of the body in a belt pouch. Due to the distance, the opposite hip receives a lower dose than the hip closer to the mobile phone. In this study, bone mineral density and bone mineral content of the right versus left hip were compared in men carrying a mobile phone on the right side. A control group of men who never used mobile phones was included for taking into account any naturally occurring right-left differences.
Bone mineralization was investigated by measuring the bone mineral density and bone mineral content of total hip, femoral neck, and trochanter using dual energy x-ray absorptiometry.

Endpoint/type of risk estimation

Exposure

Assessment

Exposure groups

Group Description
Reference group 1 nonusers: had never carried a mobile phone
Group 2 mobile phone users: carried a mobile phone on the right side for at least 1 year

Population

Study size

Type Value
Total 48
Other:

24 nonusers and 24 users

Statistical analysis method: ( adjustment: )

Conclusion (acc. to author)

Mobile phone users had been carrying their phones on average 11.0 hours per day during 5.1 years.
Allover, no difference in mean bone mineral density and bone mineral content between the two groups was found. However, mobile phone users, but not nonusers, had significantly lower bone mineral density at the right trochanter and a significantly lower bone mineral content at the right trochanter and right total hip. No correlation between cumulative hours or years of use of a mobile cell phone and the right-left differences in bone mineral density or in bone mineral density at the femoral neck or total hip was found. However, a significant correlation was observed between estimated cumulative hours carrying a cell phone on the right hip and differences between right and left trochanter bone mineral density.
The different asymmetries between right and left hip dual-energy x-ray absorptiometry values in nonusers and mobile phone users suggest that these devices may adversely affect bone mineralization.

Study funded by

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