Table 1 Descriptive statistics for NHL cases and controls
Covariates | Cases n = 1300 (%) | Controls n = 1044 (%) |
|---|---|---|
Median age at referral (5–95 % percentile) | 58 (33–73) | 61 (33–73) |
Study center | ||
Detroit | 319 (24) | 214 (20) |
Iowa | 361 (27) | 276 (26) |
Los Angeles | 319 (24) | 273 (26) |
Seattle | 322 (24) | 294 (28) |
Sex | ||
Male | 711 (54) | 546 (52) |
Female | 610 (46) | 511 (48) |
Education | ||
Low (<12 years) | 128 (10) | 111 (11) |
Middle (12–15 years) | 815 (62) | 616 (58) |
High (+16) | 377 (29) | 330 (31) |
Race | ||
African American | 110 (8) | 151 (14) |
White | 1123 (85) | 843 (80) |
Other/unknown | 88 (7) | 63 (6) |
Termite treatment in home | ||
Home not treated | 853 (65) | 717 (68) |
None or don’t know if treated | 244 (18) | 176 (17) |
At least one home treated before 1988 | 220 (17) | 162 (15) |