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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