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Table 6 Linear regression analysis of serum transthyretin and short-term use of wireless telephones

From: Mobile and cordless telephones, serum transthyretin and the blood-cerebrospinal fluid barrier: a cross-sectional study

Group n Standardized β coefficient 95% CI p
Minutes of use on the day of giving blood
Mobile telephones 163 0.01 -0.13 to 0.14 0.94
   -Men 85 0.001 -0.22 to 0.22 0.99
   -Women 78 0.03 -0.20 to 0.25 0.82
DECT 99 -0.03 -0.21 to 0.15 0.72
   -Men 41 0.01 -0.32 to 0.34 0.97
   -Women 58 -0.07 -0.33 to 0.19 0.59
Minutes from last use – blood sampling
Mobile telephones + DECT 205 -0.11 -0.23 to 0.01 0.06
   -Men 98 -0.07 -0.27 to 0.14 0.51
   -Women 107 -0.21 -0.40 to -0.02 0.03
   -Mobile telephones 159 -0.08 -0.21 to 0.06 0.25
-Men 82 0.04 -0.18 to 0.26 0.72
-Women 77 -0.25 -0.47 to -0.03 0.03
   -DECT 97 -0.12 -0.30 to 0.06 0.20
-Men 40 -0.14 -0.47 to 0.19 0.40
-Women 57 -0.13 -0.39 to 0.13 0.33
  1. Age was adjusted for in all analyses while adjustment for sex was applied only in analyses of total samples.
  2. Data for minutes from last use of mobile telephone/DECT to blood sampling are missing for six persons (four had used a mobile telephone, two had used DECT).