Table 1.
Characteristics of study population (N [%])
| Cases (N=491) | Controls (N=491) | |
|---|---|---|
| Age (years)a | ||
| 50–59 | 95 (19.4) | 95 (19.4) |
| 60–69 | 247 (50.3) | 244 (49.7) |
| 70–79 | 149 (30.4) | 152 (31.0) |
| Study regiona | ||
| Northeast | 124 (25.3) | 124 (25.3) |
| South | 109 (22.2) | 109 (22.2) |
| Midwest | 119 (24.2) | 119 (24.2) |
| West | 139 (28.3) | 139 (28.3) |
| Race | ||
| White, not Hispanic | 449 (91.4) | 416 (84.7) |
| Black or African American | 19 (3.9) | 32 (6.5) |
| Other | 22 (4.5) | 38 (7.8) |
| Missing | 1 (0.2) | 5 (1.0) |
| Education | ||
| Less than high school diploma | 16 (3.3) | 29 (5.9) |
| High school diploma or GED | 87 (17.7) | 66 (13.5) |
| Vocational or training school | 50 (10.2) | 51 (10.4) |
| Some college or associate degree | 141 (28.7) | 142 (28.9) |
| Baccalaureate degree | 58 (11.8) | 64 (13.0) |
| Some postgraduate or professional | 59 (12.0) | 50 (10.2) |
| Master’s or doctoral degree | 78 (15.9) | 86 (17.5) |
| Missing | 2 (0.4) | 3 (0.6) |
| Smoking status | ||
| Never | 255 (51.9) | 246 (50.1) |
| Former | 206 (42.0) | 215 (43.8) |
| Current | 26 (5.3) | 24 (4.9) |
| Missing | 4 (0.8) | 6 (1.2) |
| Body mass index | ||
| Underweight (<18.5) | 8 (1.6) | 10 (2.0) |
| Normal weight (18.5–24.9) | 184 (37.5) | 182 (37.1) |
| Overweight (25–29.9) | 187 (38.1) | 170 (34.6) |
| Obesity (30–34.9) | 71 (14.5) | 79 (16.1) |
| Extreme obesity (≥35) | 32 (6.5) | 44 (9.0) |
| Missing | 9 (1.8) | 6 (1.2) |
| Histologic subtype | ||
| CLL/SLL/PLL | 142 (28.8) | |
| Diffuse large B-cell (DLBCL) | 138 (28.2) | |
| Follicular lymphoma (FL) | 102 (20.9) | |
| Marginal zone lymphoma (MZL) | 45 (9.1) | |
| B-NHL, not otherwise specified (NOS) | 30 (6.1) | |
| Lymphoplasmacytic lymphoma (LPL)/Waldenstrom macroglobulinemia (WM) | 16 (3.3) | |
| Mantle cell lymphoma (MCL) | 9 (1.8) | |
| Burkitt lymphoma (BL) | 5 (1.0) | |
| Hairy cell leukemia (HCL) | 4 (0.8) |
a
Controls were matched to cases on birth year, blood draw date, and study region