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Table 1 Description of studies by Hardell et al on use of cellular and cordless telephones and the risk for tumour diseases.

From: Tumour risk associated with use of cellular telephones or cordless desktop telephones

Study Geographical area Years Included persons Response rate
CNS [2,3] Uppsala/Örebro
Stockholm
1994–1996
1995–1996
233 cases*
466 controls
209 (90%) cases
425 (91%) controls
CNS [4,5] Uppsala/Örebro, Stockholm, Linköping, Göteborg Jan 1, 1997 – June 30, 2000 1617 cases
1617 controls
1429 (88%) cases
1470 (91 %) controls
CNS, benign [6] Uppsala/Örebro, Linköping July 1, 2000 – Dec 31, 2003 462 cases**
820 controls
413 (89 %) cases
692 (84 %) controls
CNS, malignant [7] Uppsala/Örebro, Linköping July 1, 2000 – December 31, 2003 359 cases**
820 controls
317 (88 %) cases
692 (84 %) controls
Salivary gland tumours [10] Stockholm, Linköping
Uppsala/Örebro
Umeå, Göteborg, Lund
Jan 1, 1994 – Dec 31, 1999
Jan 1, 1994 – June 30, 2000
Jan 1, 1994 – June 30, 1999
293 cases
1172 controls
267 (91%) cases
1053 (90%) controls
Non-Hodgkin lymphoma [11] Umeå, Örebro, Linköping, Lund Dec 1, 1999 – April 30, 2002 995 cases
1108 controls
910 (91%) cases
1016 (92%) controls
Testicular cancer Hardell et al to be published Whole Sweden 1993 – 1997 981 cases
981 controls
889 (91%) cases
870 (89%) controls
  1. * One case had two benign brain tumours.
  2. ** One case had both a malignant and a benign brain tumour