Table 3.
Differences between cases and controls who did or did not provide information regarding IM history.
| Cases | Controls | |||||
|---|---|---|---|---|---|---|
| IM history | P value for difference between groups | IM history | P value for difference between groups | |||
| Known | Unknown | Known | Unknown | |||
| Women, n (%) | 3,910 (74) | 686 (67) | < 0.0001 | 4,199 (77) | 540 (69) | < 0.0001 |
| Swedish, n (%) | 4,335 (82) | 781 (76) | 0.0002 | 4,369 (80) | 572 (73) | < 0.0001 |
| Median anti-EBNA-1 antibody levels | 7,802 | 7,566 | 0.48 | 5,603 | 5,703 | 0.72 |
| Smoking status | ||||||
| Never, n (%) | 2,369 (45) | 405 (40) | 2,914 (54) | 384 (49) | ||
| Current, n (%) | 1,893 (36) | 432 (42) | 1,481 (27) | 220 (28) | ||
| Past, n (%) | 1,054 (20) | 187 (18) | 0.08 | 1,036 (19) | 184 (23) | 0.003 |
| Mean adolescent BMI (SD) | 22.0 (4.3) | 22.2 (6.1) | 0.47 | 21.7 (4.0) | 22.1 (6.2) | 0.11 |
| DRB1*15:01 status | ||||||
| Negative, n (%) | 2,235 (42) | 451 (44) | 3,877 (71) | 590 (75) | ||
| Heterozygotes, n (%) | 2,531 (48) | 476 (46) | 1,408 (26) | 176 (22) | ||
| Homozygotes, n (%) | 550 (10) | 97 (9.5) | 0.20 | 146 (2.7) | 22 (2.8) | 0.05 |
| A*02:01 status | ||||||
| Negative, n (%) | 3,043 (57) | 578 (56) | 2,418 (45) | 353 (45) | ||
| Heterozygotes, n (%) | 1,906 (36) | 376 (37) | 2,386 (44) | 342 (44) | ||
| Homozygotes, n (%) | 367 (6.9) | 70 (6.8) | 0.68 | 627 (12) | 93 (12) | 0.96 |