Baseline characteristics of the entire Danish population, 14 years of age and older, followed from 1980 through 2007
| . | Persons with leukemia, no. (%) . | Persons without leukemia, no. (%) . |
|---|---|---|
| Population | 18 834 | 6 523 805 |
| Median birth year (interquartile range) | 1927 (1914-1937) | 1951 (1931-1972) |
| Age group, y | ||
| 14-39 | 3820 (20) | 4 266 429 (65) |
| 40-54 | 5422 (29) | 960 815 (15) |
| 55-64 | 4283 (23) | 505 553 (8) |
| >64 | 5309 (28) | 791 008 (12) |
| Sex | ||
| Male | 10 681 (57) | 3 245 812 (49) |
| Female | 8153 (43) | 3 277 993 (51) |
| Descent | ||
| Danish | 18 173 (96) | 5 801 552 (89) |
| Other | 661 (4) | 722 253 (11) |
| Residential city size | ||
| < 12 000 or rural | 7504 (40) | 2 548 267 (39) |
| 12 000-100 000 | 4734 (25) | 1 644 689 (26) |
| > 100 000 | 6579 (35) | 2 241 996 (35) |
| Level of education | ||
| Not available | 7748 (41) | 1 560 447 (24) |
| Primary and high school | 5655 (30) | 2 236 190 (34) |
| Vocational | 3503 (19) | 1 594 048 (25) |
| Academic | 1928 (10) | 1 133 120 (17) |
| . | Persons with leukemia, no. (%) . | Persons without leukemia, no. (%) . |
|---|---|---|
| Population | 18 834 | 6 523 805 |
| Median birth year (interquartile range) | 1927 (1914-1937) | 1951 (1931-1972) |
| Age group, y | ||
| 14-39 | 3820 (20) | 4 266 429 (65) |
| 40-54 | 5422 (29) | 960 815 (15) |
| 55-64 | 4283 (23) | 505 553 (8) |
| >64 | 5309 (28) | 791 008 (12) |
| Sex | ||
| Male | 10 681 (57) | 3 245 812 (49) |
| Female | 8153 (43) | 3 277 993 (51) |
| Descent | ||
| Danish | 18 173 (96) | 5 801 552 (89) |
| Other | 661 (4) | 722 253 (11) |
| Residential city size | ||
| < 12 000 or rural | 7504 (40) | 2 548 267 (39) |
| 12 000-100 000 | 4734 (25) | 1 644 689 (26) |
| > 100 000 | 6579 (35) | 2 241 996 (35) |
| Level of education | ||
| Not available | 7748 (41) | 1 560 447 (24) |
| Primary and high school | 5655 (30) | 2 236 190 (34) |
| Vocational | 3503 (19) | 1 594 048 (25) |
| Academic | 1928 (10) | 1 133 120 (17) |
Baseline characteristics were at study entry in 1980, at the 14th birth date if born after 1980, or at immigration if after 1980. Danish descent is defined as having Danish citizenship and birthplace in Denmark, together with both parents having Danish citizenship and birthplace in Denmark. Residential city size reflects the location for longest period of residence. Level of education is the highest obtained level. Information regarding education was not available if the education was completed before 1980 or abroad. Information on descent, residential city size, and highest level of education was not available on all persons; therefore, values differ slightly.