Table 3 Characteristics of the study population by exposure type (n = 4514)
From: Survival analysis under imperfect record linkage using historic census data
| Â | Occupational | Para-Occupational | ||||
|---|---|---|---|---|---|---|
Variable | Exposed (n = 473) | Non-Exposed (n = 4037) | Difference | Exposed (n = 1635) | Non-Exposed (n = 2875) | Difference |
Age at census (yrs) | 38.5 ± 14.5 | 28.6 ± 20.6 | 9.9* | 24.6 ± 18.8 | 32.5 ± 20.5 | -7.9* |
Males (%) | ||||||
| Â | 418(88%) | 1867(46%) | 42%* | 766(47%) | 1519(53%) | -6.0%* |
Race (%) | ||||||
 White | 385(81%) | 3563(88%) | -6.9%* 6.9%* | 1314(80%) | 2634(92%) | -11.1%* 11.1%* |
 Black | 88(19%) | 472(12%) | 321(20%) | 239(8%) | ||
 Other | 0 (-) | 2 (-) | - | 0 (-) | 2 (-) | - |
 Non-U.S. born (%) | 195(41.2%) | 520(12.9%) | 28.3%* | 316(19.3%) | 399(13.9%) | 5.4%* |