Table 1. Characteristics of the cohort studies in the present pooled analysis.
| Study | Population | Age range at baseline, y |
Year of baseline survey | Population size | Response rate (%) of the baseline questionnaire |
Method of follow-up | For the present pooled analysis | |||||||
| Age range, y |
Last follow-up time | Mean follow-up period, y | Outcome | Size of the cohort | Number of pancreatic cancer cases | |||||||||
| Men | Women | Men | Women | |||||||||||
| JPHC-I | ||||||||||||||
| Japanese residents of 5 public health center areas in Japan |
40–59 | 1990 | 61,595 | 82% | Cancer registry and death certificate | 40–59 | 2010 | 18.6 | Incidence | 20,127 | 21,653 | 146 | 107 | |
| JPHC-II | ||||||||||||||
| Japanese residents of 6 public health center areas in Japan |
40–69 | 1993–1994 | 78,825 | 80% | Cancer registry and death certificate | 40–69 | 2010 | 15.6 | Incidence | 15,795 | 15,855 | 90 | 61 | |
| JACC | ||||||||||||||
| Residents from 45 areas throughout Japan | 40–79 | 1988–1990 | 110,585 | 83% | Cancer registry (selected areas: 24) and death certificate | 40–79 | 2009 | 12.9 | Incidence | 25,889 | 37,600 | 155 | 170 | |
| MIYAGI-I | ||||||||||||||
| Residents of 14 municipalities in Miyagi Prefecture, Japan |
40–64 | 1990 | 47,605 | 92% | Cancer registry and death certificate | 40–64 | 2003 | 15.7 | Incidence | 19,747 | 21,010 | 124 | 75 | |
| MIYAGI-II | ||||||||||||||
| Residents of 3 municipalities in Miyagi Prefecture, Japan |
40+ | 1984 | 31,345 | 94% | Cancer registry and death certificate | 40+ | 1992 | 7.7 | Incidence | 13,010 | 15,944 | 35 | 36 | |
| AICHI | ||||||||||||||
| Residents of 2 municipalities in Aichi Prefecture, Japan | 40–103 | 1985 | 33,529 | 90% | Cancer registry and death certificate | 40–103 | 2000 | 11.5 | Incidence | 15,738 | 17,777 | 79 | 59 | |
| OSAKA | ||||||||||||||
| Residents of 4 municipalities in Osaka Prefecture, Japan |
40–97 | 1983–1985 | 35,755 | 84.51% | Cancer registry and death certificate | 40–97 | 2000 | 12.3 | Incidence | 16,693 | 19,062 | 97 | 53 | |
| TAKAYAMA | ||||||||||||||
| Residents of Takayama city, Gifu Prefecture, Japan | 35+ | 1992 | 31,552 | 85.30% | Cancer registry and death certificate | 35–98 | 2008 | 13.8 | Incidence | 13,026 | 14,948 | 79 | 56 | |
| OHSAKI | ||||||||||||||
| Residents of 14 municipalities in Miyagi Prefecture, Japan |
40–79 | 1994 | 52,029 | 95% | Cancer registry and death certificate | 40–79 | 2003 | 9.0 | Incidence | 20,463 | 21,462 | 80 | 91 | |
| Total | 482,820 | 160,488 | 185,311 | 885 | 708 | |||||||||
AICHI, Aichi Cohort Study; JACC, The Japan Collaborative Cohort Study; JPHC, Japan Public Health Center-based Prospective Study; MIYAGI, The Miyagi Cohort Study; OHSAKI, Ohsaki Cohort Study.