Table 1.
Sex, age, education, and PCB level in participants and nonparticipants.
| Variable | Participants (n = 313) | Nonparticipants (n = 239) | p-Value |
|---|---|---|---|
| No. participating (% male) | |||
| Exposed | 162 (50) | 114 (55) | 0.39 |
| Control | 151 (52) | 125 (52) | 0.96 |
| Age [years (mean ± SD)] | |||
| Exposed | 68.9 ± 5.8 | 71.4 ± 8.1 | < 0.001a |
| Control | 69.7 ± 5.4 | 71.8 ± 8.0 | < 0.001a |
| Education [years (mean ± SD)] | |||
| Exposed only | 4.0 ± 3.5 | 3.7 ± 3.1 | 0.21 |
| PCB level in 1980–1982 [ppb (mean ± SD)] | |||
| Exposed only | 78.2 ± 87.6b | 50.1 ± 55.2b | < 0.001c |
a
Student’s t-test.
b
Data available for 145 participants and 72 nonparticipants.
c
Wilcoxon’s rank-sum test.