Table 1. Characteristics of NHL Cases and Controls in Shanghai, China.
| Characteristics | Controls (n=421) | Cases (n=169) | Total (n=590) |
|---|---|---|---|
| Gender | |||
| Female | 258 (61.3) | 103 (60.9) | 361 (61.2) |
| Male | 163 (38.7) | 66 (39.1) | 229 (38.8) |
| Age (year) | |||
| <50 | 106 (25.2) | 50 (29.6) | 156 (26.4) |
| 50-65 | 186 (44.2) | 77 (45.6) | 263 (44.6) |
| 65+ | 129 (30.6) | 42 (24.9) | 171 (29.0) |
| Mean (SD) | 57.9 (13.7) | 55.1 (12.9) | 57.1 (13.5) |
| Education* | |||
| Less than secondary school | 73 (17.3) | 144 (85.2) | 217 (36.8) |
| Secondary school | 268 (63.7) | 25 (14.8) | 293 (49.7) |
| College or university | 80 (19.0) | 80 (14.5) | |
| Marriage | |||
| Never | 10 (2.4) | 7 (4.1) | 17 (2.9) |
| Current | 361 (85.8) | 154 (91.1) | 515 (87.3) |
| Divorced/Widowed | 33 (7.8) | 8 (4.7) | 18 (3.1) |
| Missing | 17 (4.0) | 17 (2.9) | |
| BMI* (kg/m2) | |||
| <18.5 | 201 (47.7) | 104 (61.5) | 305 (51.7) |
| 18.5-24 | 11 (2.6) | 10 (5.9) | 21 (3.6) |
| 24-28 | 165 (39.2) | 46 (27.2) | 211 (35.7) |
| 28+ | 44 (10.5) | 9 (5.3) | 53 (8.9) |
| Mean (SD) | 24.3 (6.7) | 22.9 (3.1) | 23.9 (5.9) |
| Smoking* | |||
| Never | 267 (63.4) | 94 (55.6) | 361 (61.2) |
| Past | 37 (8.8) | 35 (20.7) | 72 (12.2) |
| Current | 116 (27.6) | 40 (23.7) | 156 (26.4) |
| Missing | 1 (0.2) | 1 (0.2) | |
| Alcohol | |||
| No | 328 (77.9) | 128 (75.7) | 456 (77.3) |
| Yes | 91 (21.6) | 41 (24.3) | 132 (22.4) |
| Missing | 2 (0.5) | 2 (0.3) | |
| Family history of cancer* | |||
| No | 322 (76.5) | 51 (30.2) | 373 (63.2) |
| Yes | 98 (23.3) | 118 (69.8) | 216 (36.6) |
| Missing | 1 (0.2) | 1 (0.2) |
Note: The number in bracket is proportion (%) of the total number in controls; *, P<0.001 for the comparisons between cases and controls.