Table 1.
Demographic and Clinical Characteristics of Patients With Pancreatic Cancer by Study
| Characteristic | NHS (n = 635) |
HPFS (n = 371) |
DFCI (n = 386) |
|||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| Age at diagnosis, years | ||||||
| Mean | 70.8 | 72.3 | 64.2 | |||
| SD | 7.9 | 9.0 | 10.8 | |||
| Female sex | 635 | 100.0 | 0 | 0.0 | 184 | 47.7 |
| Race/ethnicity | ||||||
| White | 620 | 97.6 | 334 | 90.0 | 359 | 93.0 |
| Black | 7 | 1.1 | 7 | 1.9 | 4 | 1.0 |
| Other | 8 | 1.3 | 12 | 3.2 | 6 | 1.6 |
| Unknown | 0 | 0.0 | 18 | 4.9 | 17 | 4.4 |
| BMI, kg/m2 | ||||||
| Mean | 26.6 | 25.4 | 29.3 | |||
| SD | 5.6 | 3.2 | 7.5 | |||
| Physical activity, MET-hr/wk | ||||||
| Mean | 16.8 | 30.3 | 13.8 | |||
| SD | 21.1 | 34.5 | 24.6 | |||
| Smoking status | ||||||
| Never | 258 | 40.6 | 144 | 38.8 | 131 | 33.9 |
| Past | 267 | 42.0 | 180 | 48.5 | 177 | 45.9 |
| Current | 100 | 15.7 | 37 | 10.0 | 37 | 9.6 |
| Missing | 10 | 1.6 | 10 | 2.7 | 41 | 10.6 |
| Cancer stage | ||||||
| Localized | 83 | 13.1 | 66 | 17.8 | 59 | 15.3 |
| Locally advanced | 59 | 9.3 | 57 | 15.4 | 69 | 17.9 |
| Metastatic | 300 | 47.2 | 180 | 48.5 | 258 | 66.8 |
| Unknown | 193 | 30.4 | 68 | 18.3 | 0 | 0.0 |
| Diagnosis period | ||||||
| 1986-2000 | 281 | 44.3 | 227 | 61.2 | 0 | 0.0 |
| 2001-2013 | 354 | 55.7 | 144 | 38.8 | 386 | 100.0 |
| Median survival time by stage, months | ||||||
| Overall | 5 | 5 | 12 | |||
| Localized | 16 | 16 | 29 | |||
| Locally advanced | 9 | 7 | 18 | |||
| Metastatic | 3 | 3 | 10 | |||
Abbreviations: BMI, body-mass index; DFCI, Dana-Farber Cancer Institute; HPFS, Health Professionals Follow-Up Study; MET, metabolic equivalent; NHS, Nurses' Health Study; SD, standard deviation.