Studies of completeness of ascertainment of cancers notified by NHSCR
| Study group | Cancers ascertained from NHSCR and the sources below | Outcome studied (diagnosis or death) | Time period of diagnoses | Date of study | Number of cases ascertained | % notified to researchers by NHSCR | Reference |
| People born in Cumbria, 1950–89 | See table 1 | diagnosis | 1971–89 | May 1999 | 740 | 94 | Present study |
| Children, aged 0–14 years, resident in England and Wales | National Registry of Childhood Tumours | diagnosis | 1971–84 | Dec 1989 | 7379 | 92 | Hawkins and Swerdlow, 1992 3 |
| Children, aged 0–19 years, resident in England and Wales | National Registry of Childhood Tumours | death | 1953–88 | 1989 | 614 | 96 | Hawkins and Swerdlow, 1992 3 |
| Women in Oxford Family Planning Association contraceptive study | Self reported morbidity | diagnosis | 1968–85 | June 1987 | 325 | 67 | Villard-Mackintosh et al, 1988 23 |
| Women with breast cancer | Clinical trial, self reported morbidity | diagnosis | 1973–82 | May 1985 | 50 | 44 | Hunt and Coleman, 1987 24 |
| Women with ovarian cancer | Self reported morbidity | diagnosis | 1986–93 | July 1997 | 49 | 78 | MacDonald et al, 2000 27 |