The study is based on the same study population as in Söderqvist et al. (2009). Additionally, data for the 18 -30 year age group were combined with data from two previously studies by Hardell et al. (2010) and Söderqvist et al. (submitted).
|Group 1||cumulative use of mobile phone and DECT phone in hours|
|Group 2||cumulative use of mobile phone in hours|
|Group 3||cumulative use of DECT phone in hours|
|Group 4||years since first use of mobile phone and DECT phone|
|Group 5||years since first use of mobile phone|
|Group 6||years since first use of DECT phone|
|Participation rate||31 %|
18 -30 year age group: 87 additional participants of two other studies
Overall, no statistically significant association between use of mobile phones as well as DECT phones and the serum concentration of beta-trace protein was found, neither with respect to short-term nor long-term use. Age-specific analyses, however, yielded negative associations for long-term use (group 1 and 3) and beta-trace protein in the youngest age group (18-30 years).