Table 2. Prevalence ratios (PRs) and 95% confidence intervals (CIs) of participation in colorectal cancer screening within 90 days since invitation in Denmark 2018–2021*.
| N | Pre-pandemic (1 January 2018 to 31 January 2020) | Pre-lockdown (1 February 2020 to 10 March 2020) | 1st lockdown (11 March 2020 to 15 April 2020) | 1st re-opening (16 April 2020 to 15 December 2020) | 2nd lockdown (16 December 2020 to 27 February 2021) | 2nd re-opening (28 February 2021 to 30 September 2021) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N=180,477 | N=104,892 | N=40,146 | N=562,124 | N=176,469 | N=445,546 | ||||||||
| PR | [95% CI] | PR | [95% CI] | PR | [95% CI] | PR | [95% CI] | PR | [95% CI] | PR | [95% CI] | ||
| Overall | 3,133,947 | 1.00 | – | 0.95 | [0.94–0.96] | 0.85 | [0.85–0.86] | 1.04 | [1.04–1.05] | 1.09 | [1.09–1.10] | 1.11 | [1.10–1.12] |
| Sex | |||||||||||||
| Men | 1,547,928 | 1.00 | – | 0.88 | [0.88–0.89] | 0.91 | [0.89–0.92] | 1.03 | [1.02–1.03] | 1.04 | [1.04–1.05] | 1.07 | [1.07–1.08] |
| Women | 1,586,019 | 1.00 | – | 0.92 | [0.92–0.93] | 0.84 | [0.83–0.85] | 1.03 | [1.02–1.03] | 1.03 | [1.03–1.04] | 1.06 | [1.06–1.07] |
| Age at invitation | |||||||||||||
| 50–54 years | 816,619 | 1.00 | – | 0.89 | [0.87–0.91] | 1.14 | [1.12–1.17] | 1.00 | [0.99–1.01] | 1.04 | [1.03–1.06] | 1.16 | [1.14–1.18] |
| 55–59 years | 664,186 | 1.00 | – | 0.93 | [0.91–0.94] | 1.09 | [1.06–1.11] | 1.11 | [1.10–1.12] | 1.24 | [1.22–1.25] | 1.18 | [1.16–1.19] |
| 60–64 years | 576,018 | 1.00 | – | 0.94 | [0.93–0.96] | 1.03 | [1.00–1.06] | 1.03 | [1.02–1.04] | 1.08 | [1.07–1.10] | 1.09 | [1.07–1.10] |
| 65–69 years | 530,163 | 1.00 | – | 0.96 | [0.95–0.97] | 0.99 | [0.96–1.02] | 1.02 | [1.01–1.03] | 1.07 | [1.06–1.09] | 1.07 | [1.06–1.08] |
| 70–74 years | 546,961 | 1.00 | – | 1.01 | [1.00–1.03] | 0.77 | [0.76–0.79] | 1.04 | [1.03–1.05] | 1.09 | [1.07–1.10] | 1.10 | [1.08–1.11] |
| Ethnicity | |||||||||||||
| Danish descent | 2,812,503 | 1.00 | – | 0.95 | [0.94–0.95] | 0.85 | [0.84–0.86] | 1.04 | [1.04–1.05] | 1.09 | [1.08–1.10] | 1.11 | [1.10–1.12] |
| Descendant of immigrant | 5054 | 1.00 | – | 0.95 | [0.79–1.14] | 0.83 | [0.62–1.11] | 1.04 | [0.93–1.17] | 1.08 | [0.91–1.28] | 1.12 | [0.94–1.32] |
| Western Immigrant | 83,517 | 1.00 | – | 0.95 | [0.91–1.00] | 0.88 | [0.82–0.94] | 1.08 | [1.05–1.11] | 1.16 | [1.11–1.21] | 1.20 | [1.15–1.25] |
| Non-western immigrant | 174,616 | 1.00 | – | 0.97 | [0.94–1.00] | 1.00 | [0.95–1.05] | 1.11 | [1.09–1.13] | 1.18 | [1.15–1.22] | 1.24 | [1.20–1.28] |
| Cohabitation status | |||||||||||||
| Living alone | 965,641 | 1.00 | – | 0.94 | [0.93–0.95] | 0.85 | [0.83–0.87] | 1.06 | [1.05–1.07] | 1.12 | [1.11–1.14] | 1.16 | [1.14–1.17] |
| Cohabiting/co-living | 282,174 | 1.00 | – | 0.95 | [0.92–0.97] | 0.97 | [0.93–1.00] | 1.05 | [1.04–1.07] | 1.12 | [1.09–1.14] | 1.14 | [1.12–1.17] |
| Married/registered partner | 1,827,748 | 1.00 | – | 0.95 | [0.95–0.96] | 0.86 | [0.85–0.87] | 1.04 | [1.03–1.04] | 1.08 | [1.07–1.09] | 1.09 | [1.09–1.10] |
| Educational level (ISCED) | |||||||||||||
| ISCED15 levels 1–2 | 1,719,351 | 1.00 | – | 0.95 | [0.94–0.95] | 0.91 | [0.90–0.92] | 1.05 | [1.04–1.05] | 1.09 | [1.08–1.10] | 1.12 | [1.11–1.13] |
| ISCED15 levels 3–5 | 1,019,019 | 1.00 | – | 0.96 | [0.94–0.97] | 0.80 | [0.79–0.82] | 1.04 | [1.03–1.04] | 1.09 | [1.08–1.10] | 1.10 | [1.09–1.11] |
| ISCED15 levels 6–8 | 339,828 | 1.00 | – | 0.95 | [0.94–0.97] | 0.83 | [0.81–0.85] | 1.05 | [1.04–1.06] | 1.11 | [1.09–1.13] | 1.12 | [1.10–1.13] |
| Disposable income | |||||||||||||
| Lowest quintile | 584,178 | 1.00 | – | 0.95 | [0.94–0.97] | 0.73 | [0.71–0.75] | 1.04 | [1.03–1.05] | 1.08 | [1.06–1.10] | 1.11 | [1.09–1.12] |
| Second quintile | 612,644 | 1.00 | – | 0.96 | [0.95–0.98] | 0.78 | [0.76–0.79] | 1.05 | [1.04–1.06] | 1.10 | [1.08–1.11] | 1.13 | [1.11–1.14] |
| Third quintile | 625,273 | 1.00 | – | 0.95 | [0.94–0.97] | 0.86 | [0.84–0.88] | 1.05 | [1.04–1.06] | 1.08 | [1.07–1.10] | 1.11 | [1.10–1.12] |
| Fourth quintile | 645,227 | 1.00 | – | 0.95 | [0.94–0.96] | 0.94 | [0.92–0.96] | 1.04 | [1.04–1.05] | 1.08 | [1.07–1.10] | 1.10 | [1.09–1.11] |
| Highest quintile | 662,590 | 1.00 | – | 0.93 | [0.92–0.94] | 0.98 | [0.96–1.00] | 1.04 | [1.03–1.05] | 1.10 | [1.09–1.11] | 1.10 | [1.09–1.11] |
| Healthcare usage | |||||||||||||
| Rare | 676,419 | 1.00 | – | 0.92 | [0.90–0.93] | 0.93 | [0.90–0.95] | 1.04 | [1.03–1.05] | 1.10 | [1.08–1.12] | 1.11 | [1.09–1.12] |
| Low | 579,271 | 1.00 | – | 0.95 | [0.94–0.97] | 0.90 | [0.88–0.92] | 1.05 | [1.04–1.06] | 1.10 | [1.08–1.11] | 1.11 | [1.10–1.13] |
| Average | 696,807 | 1.00 | – | 0.95 | [0.94–0.97] | 0.86 | [0.85–0.88] | 1.05 | [1.04–1.06] | 1.09 | [1.08–1.10] | 1.11 | [1.10–1.12] |
| High | 585,072 | 1.00 | – | 0.97 | [0.95–0.98] | 0.84 | [0.82–0.86] | 1.05 | [1.04–1.05] | 1.09 | [1.08–1.11] | 1.12 | [1.10–1.13] |
| Frequent | 596,378 | 1.00 | – | 0.97 | [0.95–0.98] | 0.81 | [0.79–0.83] | 1.04 | [1.03–1.05] | 1.09 | [1.08–1.10] | 1.11 | [1.10–1.12] |
*
Adjusted for year, month and age at invitation; PR = prevalence ratio; CI = confidence interval; ISCED = International Standard Classification of Education.