Characteristics of the cohort of patients who had a cholecystectomy for cholelithiasis, 1965–1997, Sweden
| Characteristic | Men | Women | Total |
| No patients | 87 263 | 181 049 | 268 312 |
| Mean age at entry (y) | 57.4 | 50.5 | 52.7 |
| Mean follow up (y) | 11.5 | 13.3 | 12.7 |
| Total person years of follow up | 999 434 | 2 412 972 | 3 412 406 |
| No patients with a diagnosis of obesity (%) | 571 (0.7) | 3,061 (1.7) | 3,632 (1.4) |
| No patients with a diagnosis of diabetes (%) | 6 446 (7.4) | 10 178 (5.6) | 16 624 (6.2) |
| No patients with a diagnosis of chronic pancreatitis (%) | 701 (0.8) | 490 (0.3) | 1191 (0.4) |
| No pancreatic cancers observed | 433 | 620 | 1053 |
| Mean age at diagnosis of pancreatic cancer (y) | 70.2 | 69.7 | 69.9 |