Table 1.
Characteristics of NHL Cases and Controls.
| Study Variables | Full Sample (n = 590) | Controls (n = 421) | Cases (n = 169) |
|---|---|---|---|
| NON-ENVIRONMENTAL VARIABLES | |||
| Agea | |||
| Mean (sdb) | 57.1 (13.5) | 57.9 (13.7) | 55.1 (12.9) |
| Median (Min,Maxc) | 56 (12,90) | 57 (12,90) | 55 (19,86) |
| Missing | 4 | 4 | 0 |
| Gender | |||
| female | 361 (61)d | 258 (61) | 103 (61) |
| male | 229 (39) | 163 (39) | 66 (39) |
| Educationa | |||
| none/prime school | 217 (37) | 73 (17) | 144 (85) |
| middle/high school or higher | 373 (63) | 348 (83) | 25 (15) |
| Family History of Cancera | |||
| No | 373 (63) | 322 (77) | 51 (30) |
| Yes | 216 (37) | 98 (23) | 118 (70) |
| Missing | 1 | 1 | 0 |
| Bmia | |||
| Mean (sdb) | 23.9 (6) | 24.3 (6.8) | 22.9 (3.1) |
| Median (Min,Maxc) | 23.4 (15.1,142.4) | 24 (16.4,142.4) | 22.8 (15.1,33.1) |
| Missing | 3 | 3 | 0 |
| ENVIRONMENTAL VARIABLES | |||
| Smoking | |||
| No | 361 (61) | 267 (64) | 94 (56) |
| Yes | 228 (39) | 153 (36) | 75 (44) |
| Missing | 1 | 1 | 0 |
| Alcohol | |||
| No | 456 (78) | 328 (78) | 128 (76) |
| Yes | 132 (22) | 91 (22) | 41 (24) |
| Missing | 2 | 2 | 0 |
| Hairdye | |||
| No | 384 (65) | 279 (66) | 105 (62) |
| Yes | 205 (35) | 142 (34) | 63 (38) |
| Missing | 1 | 0 | 1 |
| Lived on Farma | |||
| No | 381 (65) | 301 (71) | 80 (48) |
| Yes | 208 (35) | 120 (29) | 88 (52) |
| Missing | 1 | 0 | 1 |
| Environmental Tobacco Smokinga | |||
| No | 336 (57) | 211 (50) | 125 (74) |
| Yes | 254 (43) | 210 (50) | 44 (26) |
| Benzene Exposurea | |||
| No | 579 (98) | 421 (100) | 158 (93) |
| Yes | 11 (2) | 0 (0) | 11 (7) |
| Solvent Exposure | |||
| No | 509 (86) | 361 (86) | 148 (88) |
| Yes | 81 (14) | 60 (14) | 21 (12) |
| Metal Exposure | |||
| No | 568 (96) | 407 (97) | 161 (95) |
| Yes | 22 (4) | 14 (3) | 8 (5) |
| Agricultural Chemical Exposurea | |||
| No | 518 (88) | 395 (94) | 123 (73) |
| Yes | 72 (12) | 26 (6) | 46 (27) |
| Other Occupational Exposuresa | |||
| No | 549 (93) | 385 (91) | 164 (97) |
| Yes | 41 (7) | 36 (9) | 5 (3) |
| Pesticide Exposurea | |||
| No | 522 (88) | 396 (94) | 126 (75) |
| Yes | 68 (12) | 25 (6) | 43 (25) |
a
Variables have p-value with chi-square test or t-test <0.05.
b
Sd refers to standard deviation;
c
Min refers to the minimum value and Max refers to the maximum value in each group (Full Samples, Control, and Cases) for continuous variables.
d
The number in bracket is proportion (%) of the non-missing number in each group. For proportion calculation in brackets for category variables, we only used observed data.