|
Odds ratio (OR) and 95 % confidence interval (CI) for cumulative lifetime use in hours of analogue and digital cellular telephones, cordless telephones and any combination of the three phone types for benign brain tumours [8]. |
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| First tertile (h) |
Second tertile (h) |
Third tertile (h) |
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|
|
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| Ca/Co |
OR |
95 % CI |
Ca/Co |
OR |
95 % CI |
Ca/Co |
OR |
95 % CI |
|
|
|
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| Benign |
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| Analogue |
77/109 |
1.5 |
1.1–2.1 |
51/89 |
1.4 |
0.97–2.1 |
71/99 |
1.9 |
1.3–2.7 |
| Digital |
175/283 |
1.2 |
0.9–1.5 |
141/246 |
1.2 |
0.9–1.5 |
121/247 |
1.1 |
0.9–1.5 |
| Cordless |
146/264 |
1.1 |
0.9–1.4 |
108/204 |
1.1 |
0.8–1.4 |
169/233 |
1.5 |
1.2–1.9 |
| Total, any combination |
238/405 |
1.1 |
0.9–1.4 |
187/377 |
1.0 |
0.8–1.2 |
252/390 |
1.4 |
1.1–1.7 |
| Meningioma |
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| Analogue |
47/109 |
1.3 |
0.9–1.9 |
32/89 |
1.3 |
0.8–2.0 |
34/99 |
1.3 |
0.9–2.1 |
| Digital |
116/283 |
1.0 |
0.8–1.3 |
106/246 |
1.2 |
0.9–1.6 |
73/247 |
1.0 |
0.7–1.4 |
| Cordless |
106/264 |
1.1 |
0.8–1.4 |
70/204 |
0.9 |
0.7–1.3 |
118/233 |
1.4 |
1.1–1.9 |
| Total, any combination |
163/405 |
1.0 |
0.8–1.3 |
136/377 |
1.0 |
0.8–1.2 |
162/390 |
1.2 |
0.96–1.6 |
| Acoustic neuroma |
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| Analogue |
20/109 |
2.3 |
1.3–4.0 |
18/89 |
2.7 |
1.5–4.9 |
30/99 |
4.1 |
2.4–7.0 |
| Digital |
42/283 |
1.7 |
1.1–2.5 |
26/246 |
1.2 |
0.7–1.9 |
37/247 |
1.7 |
1.03–2.7 |
| Cordless |
27/264 |
1.1 |
0.7–1.8 |
29/204 |
1.5 |
0.95–2.5 |
40/233 |
1.8 |
1.2–2.8 |
| Total, any combination |
46/405 |
1.3 |
0.9–1.9 |
40/377 |
1.2 |
0.8–1.8 |
69/390 |
2.0 |
1.4–3.0 |
| Other benign |
|||||||||
| Analogue |
10/109 |
2.5 |
1.2–5.5 |
2/89 |
0.5 |
0.1–2.1 |
7/99 |
1.7 |
0.7–4.2 |
| Digital |
17/283 |
2.1 |
1.1–3.9 |
10/246 |
1.2 |
0.5–2.6 |
11/247 |
1.0 |
0.4–2.1 |
| Cordless |
13/264 |
1.4 |
0.7–2.8 |
9/204 |
1.4 |
0.6–3.2 |
12/233 |
1.5 |
0.7–3.1 |
| Total, any combination |
29/405 |
2.1 |
1.2–3.5 |
11/377 |
0.8 |
0.4–1.7 |
22/390 |
1.5 |
0.8–2.7 |
|
Number of exposed cases (Ca) and controls (Co) are given. Unconditional logistic regression analysis adjusted for age, sex, socio-economic index and year of diagnosis was used. Tertiles were based on use among controls. Trend, benign: Analogue – p = 0.42, digital – p = 0.97, cordless – p = 0.06, total – p = 0.02. Trend, meningioma: Analogue – p = 0.99, digital – p = 0.40, cordless – p = 0.07, total – p = 0.18. Trend, acoustic neuroma: Analogue – p = 0.17, digital – p = 0.31, cordless – p = 0.18, total – p = 0.02. Trend, other benign: Analogue – p = 0.11, digital – p = 0.16, cordless – p = 0.98, total – p = 0.047. Analogue: First tertile – 1–43 h, second tertile – >43–165 h, third tertile – >165 h Digital: First tertile – 1–30 h, second tertile – >30–149 h, third tertile – >149 h Cordless: First tertile – 1–122 h, second tertile – >122–365 h, third tertile – >365 h Total, any combination: First tertile – 1–91 h, second tertile – >91–410 h, third tertile – >410 h | |||||||||
Hardell et al. World Journal of Surgical Oncology 2006 4:74 doi:10.1186/1477-7819-4-74 |
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