Table 1.
General characteristics of BCL cases and matched controls
| Baseline variable | Cases (n = 268) | Controls (n = 268) | p valuea |
|---|---|---|---|
| Cohort, n (%) | |||
| EPIC‐Italy | 84 (31.3) | 84 (31.3) | |
| NSHDS | 184 (68.7) | 184 (68.7) | |
| Phase, n (%) | |||
| 1 | 96 (35.8) | 96 (35.8) | |
| 2 | 172 (64.2) | 172 (64.2) | |
| Sex, n (%) | |||
| Male | 132 (49.3) | 132 (49.3) | |
| Female | 136 (50.7) | 136 (50.7) | |
| Age at recruitment (years)2 | 53.1 (7.8) | 53.1 (7.8) | 0.99 |
| Alcohol intake (g/day)2 | 7.05 (12.5) | 8.25 (14.7) | 0.32 |
| Body mass index (kg/m2)2 | 26.36 (3.8) | 26.53 (4.1) | 0.57 |
| Smoking Status, n (%) | 0.80 | ||
| Never | 145 (54.1) | 150 (56.0) | |
| Former | 68 (25.4) | 63 (23.5) | |
| Current | 55 (20.5) | 55 (20.5) | |
| Highest educational level, n (%) | 0.28 | ||
| None | 4 (1.5) | 1 (0.4) | |
| Primary | 96 (35.8) | 104 (38.8) | |
| Technical/professional | 68 (25.4) | 56 (20.9) | |
| Secondary | 53 (19.8) | 65 (24.3) | |
| University/college | 47 (17.5) | 42 (15.7) | |
| Physical activity (Cambridge index), n (%) | 0.22 | ||
| Inactive | 80 (29.9) | 76 (28.4) | |
| Moderately inactive | 106 (39.6) | 95 (35.4) | |
| Moderately active | 68 (25.4) | 74 (27.6) | |
| Active | 14 (5.2) | 23 (8.6) | |
| BCL sub‐types, n (%)3 | |||
| DLBCL | 44 (16.4) | ||
| FL | 39 (14.6) | ||
| CLL | 42 (15.6) | ||
| MM | 76 (28.4) | ||
| Other subtypes | 67 (25) |
Abbreviations: CLL, chronic lymphocytic leukemia; DLBCL, diffuse large BCL; FL, follicular lymphoma; MM, multiple myeloma; EPIC, European Prospective Investigation into Cancer and Nutrition; and NSHDS, the Northern Sweden Health and Disease Study.
a
P values are based on t‐tests for continuous variables and χ2 tests for categorical variables. 2Mean (standard deviation). 3Number of cases for each subtype in EPIC‐Italy: DLBCL = 11, CLL = 11, FL = 20, MM = 21, others = 21, and in NSHDS: DLBCL = 33, CLL = 31, FL = 19, MM = 55, others = 46.