Multivariable logistic regression analyses for impact of the invitation time period on interval cancer rate
| Period | n | Interval CRC per 10 000 negative FITs | Interval CRC per 10 000 person-years | OR | 95% CI |
| Before | 1006 | 7.8 | 3.9 | Ref* | |
| During | 167 | 7.0 | 3.4 | 1.04 | 0.88–1.23 |
| After | 391 | 5.7 | 2.6 | 1.07 | 0.94–1.22 |
All ORs are adjusted for confounding variables age, sex and invitation round.
*Ref indicates that the alternative model (including the time period) better fitted the data. All ORs are presented for the alternative model including time period, regardless if it improved the model.
CRC, colorectal cancer; FIT, faecal immunochemical testing.