Observations and individuals in the aggregated study population by time and data source
| Year | SIC | DNHI | DWEC | DNHS | Cumulative number of observations | Cumulative number of individuals |
| 1981 | 3089 | 3089 | 3089 | |||
| 1982 | 3985 | 7074 | 7074 | |||
| 1983 | 4098 | 11 172 | 11 172 | |||
| 1984 | 24 | 11 196 | 11 196 | |||
| 1986 | 899 | 12 095 | 12 095 | |||
| 1987 | 288 | 3063 | 15 446 | 15 350 | ||
| 1990 | 7019 | 22 465 | 22 186 | |||
| 1991 | 1288 | 3076 | 26 829 | 26 451 | ||
| 1992 | 128 | 26 957 | 26 579 | |||
| 1993 | 80 | 27 037 | 26 659 | |||
| 1994 | 3326 | 2943 | 33 306 | 32 844 | ||
| 1995 | 13 636 | 6774 | 53 716 | 48 011 | ||
| 1996 | 17 294 | 71 010 | 63 305 | |||
| 1997 | 7418 | 78 428 | 72 723 | |||
| 1999 | 3133 | 81 561 | 75 856 | |||
| 2000 | 2194 | 9997 | 6003 | 99 755 | 87 200 | |
| 2001 | 139 | 99 894 | 87 339 | |||
| 2005 | 7701 | 8013 | 115 608 | 97 522 | ||
| 2010 | 10 312 | 92 126 | 218 046 | 191 319 | ||
| 2013 | 81 104 | 299 150 | 264 054 |
DNHI, Danish National Health Interviews; DNHS, Danish National Health Survey; DWEC, Danish Work Environment Cohort; SIC, Social Inequality in Cancer Cohort.