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Table 4 Linear regression analysis of serum transthyretin and long-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
Cumulative use (hours), mobile telephone/DECT
   -Mobile telephones + DECT 308 0.08 -0.02 to 0.18 0.11
-Men 132 0.10 -0.07 to 0.28 0.24
-Women 176 0.09 -0.06 to 0.23 0.25
   -Mobile telephones 305 0.08 -0.02 to 0.19 0.11
-Men 131 0.16 -0.02 to 0.33 0.08
-Women 174 -0.02 -0.17 to 0.13 0.80
-Analogue 58 0.24 -0.02 to 0.50 0.07
-Men 45 0.26 -0.05 to 0.56 0.10
-Women 13 0.17 -0.53 to 0.87 0.61
-Digital 302 0.08 -0.02 to 0.18 0.13
-Men 130 0.15 -0.03 to 0.32 0.10
-Women 172 -0.01 -0.16 to 0.14 0.85
-UMTS 49 -0.11 -0.38 to 0.15 0.41
-Men 31 -0.18 -0.54 to 0.17 0.31
-Women 18 0.32 -0.29 to 0.92 0.28
   -DECT 279 0.04 -0.07 to 0.14 0.50
-Men 117 -0.13 -0.31 to 0.06 0.17
-Women 162 0.10 -0.05 to 0.25 0.18
Years since first use, mobile telephone/DECT
Mobile telephones + DECT 309 0.13 0.02 to 0.24 0.03
   -Men 133 0.19 0.01 to 0.38 0.04
   -Women 176 0.10 -0.05 to 0.25 0.20
   -Mobile telephones 306 0.09 -0.03 to 0.20 0.13
   -Men 132 0.20 0.01 to 0.38 0.04
   -Women 174 0.01 -0.14 to 0.16 0.90
-Analogue 59 0.34 0.07 to 0.61 0.01
-Men 46 0.33 0.01 to 0.64 0.045
-Women 13 0.48 -0.18 to 1.14 0.14
-Digital 302 0.06 -0.05 to 0.17 0.29
-Men 130 0.14 -0.05 to 0.33 0.14
- Women 172 0.03 -0.12 to 0.17 0.74
-UMTS 49 -0.04 -0.30 to 0.23 0.78
-Men 31 -0.38 -0.71 to -0.06 0.02
-Women 18 0.48 0.01 to 0.94 0.047
   -DECT 279 0.05 -0.05 to 0.16 0.33
   -Men 117 0.02 -0.17 to 0.20 0.85
   -Women 162 0.09 -0.07 to 0.24 0.26
  1. Age was adjusted for in all analyses while adjustment for sex was applied only in analyses of total samples.
  2. Data for cumulative use of mobile telephone/DECT are missing for two persons (one had used only a mobile telephone, the other had used both a mobile telephone and DECT). Data for latency of mobile telephone/DECT are missing for one person (a user of both mobile telephone and DECT).