Table 1.
Characteristics of the NCI-SEER NHL study population included in the analysis (N=1170) by study center.
| Detroit | Iowa | Los Angeles | Seattle | |||||
|---|---|---|---|---|---|---|---|---|
| All | LT | All | LT | All | LT | All | LT | |
| Number of participants | 201 | 99 | 335 | 198 | 292 | 109 | 342 | 81 |
| Cases | 127 (63) | 64 (65) | 188 (56) | 106 (54) | 168 (58) | 63 (58) | 182 (53) | 47 (58) |
| Controls | 74 (37) | 35 (35) | 147 (44) | 92 (46) | 124 (42) | 46 (42) | 160 (47) | 34 (42) |
| Age (years) | 58 (11.4) | 56 (12.1) | 61 (11.2) | 61 (11.7) | 59 (11.2) | 57 (11.4) | 59 (10.8) | 56 (12.1) |
| Sex | ||||||||
| Male | 114 (57) | 54 (55) | 177 (53) | 105 (53) | 165 (57) | 63 (58) | 171 (50) | 45 (56) |
| Female | 87 (43) | 45 (45) | 158 (47) | 93 (47) | 127 (43) | 46 (42) | 171 (50) | 36 (44) |
| Race | ||||||||
| White | 164 (81) | 83 (84) | 331 (99) | 195 (98) | 215 (74) | 73 (67) | 316 (92) | 75 (93) |
| Non-white | 37 (19) | 16 (16) | 4 (1) | 3 (2) | 77 (26) | 36 (33) | 26 (8) | 6 (7) |
| Education | ||||||||
| < 12 years | 23 (11) | 12 (12) | 32 (10) | 23 (12) | 31 (11) | 15 (14) | 19 (6) | 8 (10) |
| 12-15 years | 124 (62) | 67 (68) | 241 (72) | 152 (77) | 171 (59) | 67 (61) | 201 (59) | 48 (59) |
| >= 16 years | 54 (27) | 20 (20) | 62 (19) | 23 (12) | 90 (31) | 27 (25) | 122 (35) | 25 (31) |
| Unique census tracts | ||||||||
| 2000 | 172 | 260 | 256 | 229 | ||||
| 1990 | 168 | 255 | 243 | 218 | ||||
| 1980 | 160 | 131 | 234 | 210 | ||||
| Population in census tracts | ||||||||
| 2000 | 3743 (2907, 4889) | 3701 (2925, 4608) | 5189 (3877, 6422) | 4911 (3987, 6087) | ||||
| 1990 | 3672 (2991, 5030) | 3624 (2979, 4613) | 5579 (4138, 7075) | 5594 (4086, 6947) | ||||
| 1980 | 4535 (3230, 5709) | 4135 (3233, 5470) | 4876 (3786, 6478) | 5194 (3972, 6384) | ||||
Note: Age summarized using mean (standard deviation) and all other demographic variables summarized using count (percent). “LT” denotes long-term residents at a study center whose entire residential history was contained within the geographic bounds of the center. In the United States, < 12 years of education corresponds to less than a high school degree, 12-15 years corresponds to a high school degree and potentially some college, and >= 16 years corresponds to a college degree. Unique census tracts refers to the number of unique tracts among all participants and the population in census tracts is summarized with median (1st quartile, 3rd quartile). Some percentages may not sum exactly to one due to rounding.