Risk of non-Hodgkin's lymphoma for selected indices of mean exposure to electric fields
| Mean exposure to electric fields (in V/m)7-150 | Exposure time window | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Career exposure | 10 y Before diagnosis | 20 y Before diagnosis | |||||||||
| Cases | Controls | OR (95% CI) | Cases | Controls | OR (95% CI) | Cases | Controls | OR (95% CI) | |||
| Arithmetic mean: | |||||||||||
| 0–<8.58 | 14 | 72 | 1.0 — | 12 | 51 | 1.0 | 11 | 42 | 1.0 | ||
| 8.58–<13.67 | 12 | 65 | 0.97 (0.36 to 2.58) | 7 | 34 | 0.96 (0.24 to 3.81) | 8 | 31 | 0.90 (0.25 to 3.30) | ||
| >13.67 | 25 | 66 | 1.97 (0.75 to 5.18) | 15 | 39 | 1.75 (0.56 to 5.48) | 15 | 47 | 0.93 (0.29 to 3.05) | ||
| Geometric mean: | |||||||||||
| 0–<1.60 | 11 | 81 | 1.0 — | 9 | 48 | 1.0 | 9 | 38 | 1.0 | ||
| 1.60–<1.96 | 21 | 56 | 3.24 (1.18 to 8.89) | 10 | 37 | 2.05 (0.45 to 9.43) | 5 | 42 | 0.42 (0.09 to 1.95) | ||
| >1.96 | 19 | 66 | 2.41 (0.88 to 6.56) | 15 | 39 | 3.73 (0.80 to 17.33) | 20 | 40 | 2.26 (0.66 to 7.78) | ||
| SD: | |||||||||||
| 0–<26.22 | 13 | 65 | 1.0 — | 10 | 57 | 1.0 | 13 | 42 | 1.0 | ||
| 26.22–<52.51 | 21 | 76 | 1.18 (0.49 to 2.81) | 13 | 30 | 3.00 (0.82 to 10.91) | 10 | 33 | 1.32 (0.44 to 3.95) | ||
| >52.51 | 17 | 62 | 0.94 (0.34 to 2.60) | 11 | 37 | 1.50 (0.47 to 4.84) | 11 | 45 | 0.50 (0.16 to 1.60) | ||
| Autocorrelation at 5 minute lags: | |||||||||||
| 0–<0.14 | 17 | 67 | 1.0 — | 9 | 39 | 1.0 | 8 | 27 | 1.0 | ||
| 0.14–<0.17 | 12 | 73 | 0.76 (0.31 to 1.85) | 11 | 48 | 0.98 (0.30 to 3.19) | 8 | 50 | 0.29 (0.08 to 1.12) | ||
| >0.17 | 22 | 63 | 1.60 (0.70 to 3.67) | 14 | 37 | 2.70 (0.70 to 10.36) | 18 | 43 | 0.96 (0.31 to 2.94) | ||
| Mean transition in field strength: | |||||||||||
| 0–<0.87 | 16 | 71 | 1.0 — | 14 | 52 | 1.0 | 12 | 43 | 1.0 | ||
| 0.87–<0.96 | 18 | 66 | 0.83 (0.33 to 2.07) | 10 | 34 | 1.11 (0.33 to 3.80) | 8 | 30 | 0.80 (0.24 to 3.10) | ||
| >0.96 | 17 | 66 | 0.62 (0.22 to 1.74) | 10 | 38 | 0.63 (0.17 to 2.30) | 14 | 47 | 0.69 (0.18 to 2.62) | ||
↵7-150 Categorised into tertiles according to the distribution of exposure of all controls; the mean was calculated by dividing the cumulative exposure for the relevant index by the number of years employed.
ORs were adjusted for total duration of employment, socioeconomic status, and exposure to benzene, and 2,4,5-T.