Table 1.
Characteristics of pancreatic cancer cases and unaffected controls
| Variable | Cases (n=1143) | Controls (n=1097) | p value | ||
|---|---|---|---|---|---|
| n | % | n | % | ||
| Mean age at diagnosis or recruitment | 65.5 | 65.6 | 0.79 | ||
| Age < 60 yrs. | 329 | (29%) | 297 | (27%) | 0.37 |
| Gender - Male | 668 | (58%) | 557 | (51%) | <.001 |
| Ethnicity - Non-Hispanic Whites* | 1143 | (100%) | 1097 | (100%) | |
| Smoking | |||||
| Ever-smoker | 682 | (60%) | 505 | (46%) | <.001 |
| Smoking status | <.001 | ||||
| Never-smoker** | 455 | (40%) | 592 | (54%) | |
| Former smoker | 527 | (47%) | 458 | (42%) | |
| Current smoker | 148 | (13%) | 41 | (4%) | |
| Missing | 13 | 6 | |||
| Years smoked (±SD) | 22.4 | ± 16.9 | 18.2 | ± 14.0 | <.001 |
| Pack-years smoked (±SD) | 17.0 | ± 23.0 | 9.3 | ± 17.2 | <.001 |
| Body Mass Index (±+SD) | 27.8 | ± 5.5 | 27.2 | ± 4.7 | 0.01 |
| Region | <.001 | ||||
| MN, IA, or WI (Tristate) | 579 | (51%) | 748 | (68%) | |
| North or South Dakota | 94 | (8%) | 40 | (4%) | |
| Other USA | 448 | (39%) | 308 | (28%) | |
| Other Country | 22 | (2%) | 1 | (0%) | |
| Pancreas Cancer Status at Enrollment | |||||
| Resected | 328 | (29%) | -- | -- | |
| Locally advanced | 379 | (33%) | -- | -- | |
| Metastatic | 430 | (38%) | -- | -- | |
| Not specified | 6 | (1%) | -- | -- | |
| Family History of Pancreatic Cancer (1st degree) |
79 | (7%) | 43 | (4%) | 0.002 |
*
Only Non-Hispanic whites included in the analysis
**
Defined as less than 100 cigarettes in lifetime.