Table 3.
Work-Related EMF Exposure and Dementia or Alzheimer’s Disease Shown Separately for Age of Onset in Cases, Gender, and Type of Occupation
| EMF Exposure in μT | n (%) Cases | n (%) Controls | AOR | 95% CI | p Value | n (%) Cases | n (%) Controls | AOR | 95% CI | p Value |
| Age of onset ≤75 | Age of onset >75 | |||||||||
| All types of dementia | 87 (100) | 9,292 (100) | 129 (100) | 9,292 (100) | ||||||
| <0.12 (reference) | 16 (18) | 2,720 (29) | 1.00 | 34 (26) | 2,720 (29) | 1.00 | ||||
| ≥0.12 to <0.20 | 40 (46) | 3,993 (43) | 1.94 | 1.07–3.54 | .030 | 53 (41) | 3,993 (43) | 1.12 | 0.68–1.87 | .652 |
| ≥0.20 | 31 (36) | 2,579 (28) | 2.01 | 1.10–3.65 | .022 | 42 (33) | 2,579 (28) | 1.02 | 0.59–1.75 | .954 |
| Alzheimer’s disease | 47 (100) | 9,292 (100) | 94 (100) | 9,292 (100) | ||||||
| <0.12 (reference) | 10 (21) | 2,720 (29) | 1.00 | 25 (27) | 2,720 (29) | 1.00 | ||||
| ≥0.12 to <0.20 | 20 (43) | 3,993 (43) | 1.69 | 0.74–3.87 | .215 | 38 (40) | 3,993 (43) | 1.17 | 0.66–2.08 | .585 |
| ≥0.20 | 17 (36) | 2,579 (28) | 1.94 | 0.90–4.18 | .090 | 31 (33) | 2,579 (28) | 1.20 | 0.62–2.11 | .656 |
| Men | Women | |||||||||
| All types of dementia | 95 (100) | 4,462 (100) | 121 (100) | 4,830 (100) | ||||||
| <0.12 (reference) | 9 (9) | 598 (13) | 1.00 | 41 (34) | 2,122 (44) | 1.00 | ||||
| ≥0.12 to <0.20 | 50 (53) | 2,426 (54) | 1.62 | 0.77–3.42 | .202 | 43 (36) | 1,567 (32) | 1.39 | 0.83–2.31 | .210 |
| ≥0.20 | 36 (38) | 1,438 (32) | 1.81 | 0.84–3.88 | .127 | 37 (31) | 1,141 (24) | 1.14 | 0.67–1.94 | .623 |
| Alzheimer’s disease | 54 (100) | 4,462 (100) | 94 (100) | 4,830 (100) | ||||||
| <0.12 (reference) | 5 (9) | 598 (13) | 1.00 | 30 (34) | 2,122 (44) | 1.00 | ||||
| ≥0.12 to <0.20 | 27 (50) | 2,426 (54) | 1.34 | 0.48–3.73 | .266 | 31 (36) | 1,567 (32) | 1.44 | 0.78–2.66 | .247 |
| ≥0.20 | 22 (41) | 1,438 (32) | 1.80 | 0.64–5.05 | .264 | 26 (29) | 1,141 (24) | 1.08 | 0.57–2.07 | .805 |
| Manual workers | Nonmanual workers | |||||||||
| All types of dementia | 140 (100) | 4,570 (100) | 76 (100) | 4,722 (100) | ||||||
| <0.12 (reference) | 19 (14) | 894 (20) | 1.00 | 31 (41) | 1,826 (39) | 1.00 | ||||
| ≥0.12 to <0.20 | 69 (49) | 2,050 (45) | 1.81 | 1.06–3.09 | .030 | 24 (32) | 1,943 (41) | 1.15 | 0.57–2.32 | .689 |
| ≥0.20 | 52 (37) | 1,626 (36) | 1.75 | 1.00–3.05 | .049 | 21 (28) | 953 (20) | 1.07 | 0.56–2.03 | .844 |
| Alzheimer’s disease | 90 (100) | 4,570 (100) | 51 (100) | 4,722 (100) | ||||||
| <0.12 (reference) | 11 (12) | 894 (20) | 1.00 | 24 (47) | 1,826 (39) | 1.00 | ||||
| ≥0.12 to <0.20 | 46 (51) | 2,050 (45) | 2.09 | 1.04–4.19 | .038 | 12 (24) | 1,943 (41) | 0.81 | 0.31–2.16 | .675 |
| ≥0.20 | 33 (37) | 1,626 (36) | 2.00 | 0.98–4.09 | .056 | 15 (29) | 953 (20) | 1.02 | 0.46–2.28 | .957 |
Note: AOR = adjusted odds ratio; 95% CI = 95% confidence interval. Results adjusted for age, gender, education, complexity of work with people and things, and coronary artery disease.