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Table 1 Descriptive data for the study

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

  Men Women Total
Total included 500 500 1 000
   -Age: mean, median 41.8, 41.0 41.6, 42.0 41.7, 42.0
Range 18–65 18–65 18–65
Declined to participate 127 156 283
Did not answer inquiry 196 116 312
Answered yes to participation 177 228 405
   -Did not give blood 44 44 88
Participated 133 184 317
   -Did not answer the questionnaire 0 2 2
   -Unknown date for drawing blood 0 1 1
   -Missing data, transthyretin 0 1 1
Final participants 133 180 313
   -Age: mean, median 47.1, 50.0 44.4, 46.0 45.6, 47.0
Range 18–65 18–64 18–65