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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.
|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|
24 nonusers and 24 users
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.