Table 2

 Summary of nine studies on glioma and use of wireless telephones

StudyPeriod coveredStudy typeAge (years)Tumour typeNo. of casesOR* (95% CI)Comments
SIR, standardised incidence ratio.
*Unless otherwise stated.
Inskip et al 2001, USA51994–1998Case–control⩾18Glioma110.6 (0.3 to 1.4)⩾5 years of cell phone use
Auvinen et al 2002, Finland71996Case–control, register-based20–69Glioma1191.5 (1.0 to 2.4)Analogue and digital cell phone “ever” use
402.1 (1.3 to 3.4)Analogue cell phone “ever” use
112.4 (1.2 to 5.1)Analogue cell phone use 1–2 years
112.0 (1.0 to 4.1)Analogue cell phone use, >2 years
Lönn et al 2005, Sweden Interphone102000–2002Case–control20–69Glioma2140.8 (0.6 to 1.0)Regular use
151.6 (0.8 to 3.4)⩾10 years since first “regular” cell phone use on same side of head as tumour
110.7 (0.3 to 1.5)⩾10 years since first “regular” cell phone use on opposite side of head as tumour.
Christensen et al 2005 Denmark Interphone122000–2002Case–control20–69Low-grade glioma471.1 (0.6 to 2.0)Regular use
61.6 (0.4 to 6.1)⩾10 years since first “regular” use of cell phone
High-grade glioma590.6 (0.4 to 0.9)Regular use
80.5 (0.2 to 1.3)⩾10 years since first regular use of cell phone
17 ORs for high-grade glioma, all <1.0, indicate systematic bias.
Hepworth et al 2006 UK Interphone132000–2004Case–control18–69Glioma5080.9 (0.8 to 1.1)Regular use
Not given1.6 (0.9 to 2.8)⩾10 years of cell phone use on same side of head as tumour.
Not given0.8 (0.4 to 1.4)>10 years of cell phone use on opposite side of head as tumour.
Schüz et al 2006 Germany Interphone142000–2003Case–control30–59 (2000–2001), 30–69 (2001–2003)Glioma1381.0 (0.7 to 1.3)Regular use
122.2 (0.9 to 5.1)⩾10 years since first “regular” use of cell phone
302.0 (1.1 to 3.5)Female regular use of cell phone (glioma, high-grade)
Hardell et al 2006b, Sweden161997–2003Case–control20–80Glioma, high-grade2811.4 (1.1 to 1.8)>1-year latency of cell phone use
713.1 (2.0 to 4.6)>10-year latency of cell phone use
395.4 (3.0 to 9.6)>10-year latency of ipsilateral cell phone use
232.2 (1.3 to 3.9)>10-year latency of cordless phone use
104.7 (1.8 to 13)>10-year latency of ipsilateral cordless phone use
Glioma, low-grade651.4 (0.9 to 2.3)>1-year latency of cell phone use
71.5 (0.6 to 3.8)>10-year latency of cell phone use
21.2 (0.3 to 5.8)>10-year latency of ipsilateral cell phone use
51.6 (0.5 to 4.6)>10-year latency of cordless phone use
33.2 (0.6 to 16)>10-year latency of ipsilateral cordless phone use
Schüz et al 2006, Denmark171982–2002Cohort⩾18Glioma257SIR = 1.0 (0.9 to 1.1)No laterality of tumour and mobile phone given
54SIR = 1.2 (0.9 to 1.6)Temporal lobe
Lahkola et al Denmark, Norway, Finland, Sweden, UK Interphone19September 2000–February 2004 (differed between countries)Case–control20–69 (Nordic countries), 18–59 (UK)Glioma8670.8 (0.7 to 0.9)Regular use
771.4 (1.01 to 1.9)Ipsilateral mobile phone use, ⩾10 years since first use, p for trend = 0.04