Table 2. Association between baseline characteristics and JCV T-antigen (T-Ag) seroreactivity among controls, Washington County, MD.
| JCV T-Ag seroreactivity | |||
|---|---|---|---|
|
| |||
| High1 | Low1 | ||
| Baseline characteristic | n (%)2 | n (%)2 | P value |
| Gender | |||
| Female | 81 (40.1) | 121 (59.9) | <.0001 |
| Male | 108 (60.7) | 70 (39.3) | |
| Age (years) | |||
| <35 | 1 (33.3) | 2 (66.7) | 0.68 |
| 35-44 | 15 (45.5) | 18 (54.5) | |
| 45-54 | 51 (53.1) | 45 (46.9) | |
| 55-46 | 51 (47.2) | 57 (52.8) | |
| 65-74 | 58 (54.2) | 49 (45.8) | |
| 75+ | 13 (40.6) | 19 (59.4) | |
| Cigarette smoking status | |||
| Current | 21 (50.0) | 21 (50.0) | 0.86 |
| Former | 65 (51.6) | 61 (48.4) | |
| Never | 103 (48.6) | 109 (51.4) | |
| Body mass index (kg/m2) | |||
| <25 | 69 (44.5) | 86 (55.5) | 0.18 |
| 25-30 | 85 (51.8) | 79 (48.2) | |
| 30+ | 35 (57.4) | 26 (42.6) | |
| NSAID use 48 hours prior to blood | |||
| No | 137 (49.8) | 138 (50.2) | 1.00 |
| Yes | 52 (49.5) | 53 (50.5) | |
| Family history of colorectal cancer3 | |||
| No | 133 (53.6) | 115 (46.4) | 0.01 |
| Yes | 12 (37.5) | 30 (71.4) | |
| Recent hormone use (women only) | |||
| No | 67 (40.4) | 99 (59.6) | 1.00 |
| Yes | 14 (40.0) | 21 (60.0) | |
1
Based on the median;
2
row percentages;
3
ascertained through follow-up questionnaire in 1996