Table 1.
Characteristics of cases and controls in EIMS and GEMS
| EIMS | GEMS | |||
|---|---|---|---|---|
| Cases | Controls | Cases | Controls | |
| Women (n, %) | 1295 (73) | 2838 (73) | 3330 (74) | 3056 (76) |
| Men (n, %) | 485 (27) | 1047 (27) | 1172 (26) | 983 (24) |
| Swedish origin (n, %) | 1411 (79) | 2938 (76) | 3698 (82) | 3300 (82) |
| IM (n, %) | 326 (18) | 421 (11) | 662 (15) | 313 (8) |
| Prepubescent IM | 115 | 19 | 188 | 95 |
| IM before age 20 | 278 | 352 | 536 | 234 |
| IM at or after age 20 | 48 | 69 | 126 | 79 |
| Mean age (SD) | 15 (6) | 16 (7) | 18 (13) | 17 (13) |
| Median age | 15 | 16 | 15 | 15 |
| Range of ages | 1–41 | 1–52 | 0–30 | 0–27 |
| Smoking (n, %) | 936 (53) | 1747 (45) | 2589 (58) | 1979 (49) |
| Large conurbations (n, %) | 465 (26) | 974 (25) | 2153 (48) | 1912 (47) |
| Snuff use (n, %) | 280 (16) | 613 (16) | 431 (10) | 370 (9) |
| BMI > 27 kg/m2 (n, %) | 166 (9) | 201 (5) | 240 (5) | 159 (4) |
| Total (n, %) | 1780 (100) | 3885 (100) | 4502 (100) | 4039 (100) |
IM, infectious mononucleosis; BMI, body mass index.