Table 1.
Basic parameters and endpoints in the 19 counties of Norway in the Norwegian Women and Cancer Study
| Counties | Sample population per county | Number of CRC cases | Incidence proportion of CRC (%) | Crude incidence rate per 100,000 | Average follow-up time in years | Person-years at risk |
|---|---|---|---|---|---|---|
| Østfold | 4836 | 106 | 2.2 | 146 | 15.0 | 72,563 |
| Akershus | 9661 | 177 | 1.8 | 121 | 15.1 | 146,259 |
| Oslo | 8439 | 142 | 1.7 | 111 | 15.1 | 127,573 |
| Hedmark | 3808 | 62 | 1.6 | 108 | 15.2 | 57,671 |
| Opplanda | 3544 | 47 | 1.3 | 88 | 15.0 | 53,315 |
| Buskerud | 4496 | 78 | 1.7 | 115 | 15.1 | 67,970 |
| Vestfold | 4267 | 81 | 1.9 | 125 | 15.2 | 64,808 |
| Telemark | 3137 | 45 | 1.4 | 96 | 15.0 | 46,975 |
| Aust-Agder | 1827 | 34 | 1.9 | 123 | 15.1 | 27,640 |
| Vest-Agder | 2715 | 47 | 1.7 | 114 | 15.1 | 41,088 |
| Rogaland | 6503 | 117 | 1.8 | 119 | 15.2 | 98,500 |
| Hordaland | 7736 | 130 | 1.7 | 110 | 15.2 | 117,863 |
| Sogn og Fjordaneb | 1889 | 49 | 2.6 | 171 | 15.2 | 28,655 |
| Møre og Romsdal | 4653 | 80 | 1.7 | 112 | 15.3 | 71,354 |
| Sør Trøndelag | 4882 | 67 | 1.4 | 91 | 15.1 | 73,835 |
| Nord-Trøndelag | 2607 | 45 | 1.7 | 114 | 15.2 | 39,530 |
| Nordland | 11,443 | 322 | 2.8 | 169 | 16.7 | 190,621 |
| Troms | 7264 | 176 | 2.4 | 146 | 16.6 | 120,723 |
| Finnmark | 3186 | 70 | 2.2 | 132 | 16.7 | 53,171 |
| Total | 96,893 | 1,875 | 1.9 | 125 | 15.5 | 1,500,112 |
Notes: aCounty with lowest CRC incidence. bCounty with highest CRC incidence.
Abbreviation: CRC, colorectal cancer.