Table 1. Characteristics of the Dietary Cohort Consortium studies.
| Studya | Participants | Diary completion (years) | Final follow-up date | Follow-up duration (years)b | Prostate cancer cases (n) | Clinical stage (n, advanced/localised/ unknown) | Controls (n) |
Control matching |
Age at diary completion (years)b | |
|---|---|---|---|---|---|---|---|---|---|---|
| Age at diary completion | Month of diary completion | |||||||||
| EPIC-Norfolk | Population | 1993–1998 | 31/12/2009 | 7.3 (3.2) | 439 | 105/251/83 | 1752 | ± 3 years | ± 3 months | 64.8 (7.7) |
| EPIC-Oxford | Population and vegetarians | 1993–1999 | 31/12/2007 | 6.6 (2.7) | 125 | 22/73/30 | 125 | ± 6 months | ± 6 months | 64.6 (8.0) |
| NSHD | Born 1946 | 1989–1990 | 31/12/2008 | 13.3 (3.3) | 15 | 0/0/15 | 60 | ± 3 years | ± 3 months | 43.5 (0.2) |
| ProtecT | Population | 2003–2009 | 29/04/2009 | 0.2 (0.3) | 1054 | 99/953/2 | 1261 | ± 5 years | ± 3 months | 62.9 (4.7) |
| Whitehall II | Civil servants | 1991–1993 | 29/11/2005 | 9.0 (2.9) | 84 | 0/0/84 | 330 | ± 3 years | ± 3 months | 54.8 (4.8) |
a
Abbreviations: EPIC, European Prospective Investigation into Cancer and Nutrition; NSHD, National Survey of Health and Development; ProtecT, Prostate testing for cancer and Treatment.
b
Mean (s.d.) in years.