Table 1.
Distribution of characteristics of cases and controls included in analysis.
| Characteristics | Cases (n = 171) | Controls (n = 338) | |||
|---|---|---|---|---|---|
|
| |||||
| No. | % | No. | % | ||
| HM (ICD-9 code) a | Leukaemia (204–208) | 78 | 45.6 | - | - |
| Non-Hodgkin lymphoma (200, 202) | 52 | 30.4 | - | - | |
| Myeloma (203) | 38 | 22.2 | - | - | |
| Hodgkin’s disease (201) | 3 | 1.8 | - | - | |
|
| |||||
| Sex | Male | 85 | 49.7 | 170 | 50.3 |
| Female | 86 | 50.3 | 168 | 49.7 | |
|
| |||||
| Age at diagnosis (years) or index year | Males ≤65 | 21 | 12.2 | 45 | 13.3 |
| Males >65 | 64 | 37.5 | 125 | 37.0 | |
| Females ≤65 | 10 | 5.9 | 23 | 6.8 | |
| Females >65 | 76 | 44.4 | 145 | 42.9 | |
|
| |||||
| Distance to nearest power line, meters | ≤200 | 44 | 25.7 | 80 | 23.7 |
| >200 | 127 | 74.3 | 258 | 76.3 | |
a
ICD-9 code: codes of International Classification of Diseases, ninth revision (WHO 1977)