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Table 1 Selected characteristics of glioma cases and controls, INTEROCC study, 2000–2004*
| Variable | Glioma cases | Controls |
|---|---|---|
| (n = 1800) | (n = 5160) | |
| Age, mean (SD) | 50.6 (10.0) | 51.2 (9.7) |
| Males, n (%) | 1116 (62.0) | 2308 (44.7) |
| Education, n (%) | ||
| Primary/secondary | 766 (42.6) | 2253 (43.7) |
| Intermediate college/professional | 391 (21.7) | 1085 (21.0) |
| Tertiary | 643 (35.7) | 1822 (35.3) |
| Proxy respondent, n (%) | 257 (14.3) | 23 (0.4) |
| Country, n (%) | ||
| Australia | 277 (15.4) | 665 (12.9) |
| Canada | 169 (9.4) | 649 (12.6) |
| France | 93 (5.2) | 471 (9.1) |
| Germany | 366 (20.3) | 1494 (29.0) |
| Israel | 282 (15.7) | 698 (13.5) |
| New Zealand | 75 (4.2) | 160 (3.1) |
| United Kingdom | 538 (29.9) | 1023 (19.8) |
| Tumor histology, n (%) | ||
| Glioblastomas | 848 (47.1) | - |
| Other | 952 (52.9) | - |
| Occupational Prestige Scale (SIOPS), mean (SD) | 43.2 (11.5) | 44.0 (11.8) |
| Marital status, n (%) | ||
| Single | 159 (8.9) | 431 (8.4) |
| Married | 1422 (79.3) | 4035 (78.3) |
| Divorced | 142 (7.9) | 494 (9.6) |
| Widowed | 62 (3.5) | 190 (3.7) |
| Don’t know | 8 (0.4) | 5 (0.1) |
| Missing | 7 (−) | 5 (−) |
| Smoking status | ||
| Never | 906 (50.3) | 2521 (48.9) |
| Ex-smoker | 386 (21.4) | 1212 (23.5) |
| Current | 508 (28.2) | 1427 (27.7) |
| Asthma, hay fever, eczema, n (%) | 416 (23.1) | 1380 (26.7) |
