Introduction
Methods
Setting and population
Study design and exclusion criteria
Registers and variables
Statistical analysis
Ethical approvals
Results
General observations on non-participation
Participants | Non-participants |
P value (chi2) | |
---|---|---|---|
N (% column) |
N (% column) | ||
In total | 113,811 (78.9) | 30,453 (21.1) | |
Previous cancer | < 0.001 | ||
No | 108,856 (79.1) | 28,770 (20.9) | |
Yes | 4955 (74.7) | 1683 (25.3) | |
In cancer treatment | < 0.001 | ||
No | 113,486 (79.0) | 30,111 (21.0) | |
Yes | 325 (48.3) | 342 (48.6) | |
In cancer follow-up programme | < 0.001 | ||
No | 113,368 (78.9) | 30,273 (21.1) | |
Yes | 443 (71.1) | 180 (28.9) | |
In palliative care | < 0.001 | ||
No | 113,703 (79.0) | 30,213 (21.0) | |
Yes | 108 (31.0) | 240 (69.0) | |
Time from diagnosis to screening date (in years) | < 0.001 | ||
No diagnosis | 108,856 (79.1) | 28,770 (20.9) | |
0–1 | 403 (58.7) | 284 (41.3) | |
> 1–5 | 1152 (73.4) | 417 (26.6) | |
> 5–10 | 915 (77.9) | 259 (22.1) | |
> 10 | 2485 (77.5) | 723 (22.5) | |
Age on the screening date (in years) | < 0.001 | ||
50–54 | 30,965 (80.4) | 7536 (19.6) | |
55–59 | 30,722 (80.2) | 7580 (19.8) | |
60–64 | 30,532 (79.2) | 7998 (20.8) | |
65–69 | 21,592 (74.6) | 7339 (25.4) | |
Marital status | < 0.001 | ||
Married/cohabiting | 88,590 (82.7) | 18,484 (17.3) | |
Living alone | 25,183 (67.9) | 11,924 (32.1) | |
Ethnicity | < 0.001 | ||
Danish descendant | 110,018 (79.6) | 28,201 (20.4) | |
Immigrant | 3773 (62.9) | 2224 (37.1) | |
Education (years) | < 0.001 | ||
≤ 10 | 39,214 (75.6) | 12,651 (24.4) | |
11–15 | 47,661 (81.8) | 10,624 (18.2) | |
> 15 | 25,549 (80.2) | 6286 (19.8) | |
CCI score | < 0.001 | ||
0 | 94,532 (80.0) | 23,584 (19.9) | |
1 | 11,730 (76.7) | 3568 (23.3) | |
≥ 2 | 7549 (69.6) | 3301 (30.4) |
Non-participation among previous cancer patients
n
| Unadjusted PRR (95% CI) | Model 1a PRR (95% CI) | Model 2b PRR (95% CI) | |
---|---|---|---|---|
Previous cancer | ||||
No | 137,626 | 1 (ref.) | 1 (ref.) | 1 (ref.) |
Yes | 6638 |
1.21 (1.16–1.27)
|
1.14 (1.09–1.19)
| 0.99 (0.95–1.04) |
In cancer treatment | ||||
No | 143,597 | 1 (ref.) | 1 (ref) | 1 (ref.) |
Yes | 667 |
2.45 (2.27–2.34)
|
2.29 (2.12–2.48)
|
1.75 (1.57–1.96)
|
In cancer follow-up | ||||
No | 143,641 | 1 (ref.) | 1 (ref.) | 1 (ref.) |
Yes | 623 |
1.37 (1.22–1.54)
|
1.29 (1.16–1.43)
| 0.95 (0.84–1.08) |
In palliative carec | ||||
No | 143,916 | 1 (ref.) | 1 (ref.) | 1 (ref.) |
Yes | 348 |
3.28 (3.05–3.53)
|
2.80 (2.59–3.01)
|
1.95 (1.75–2.18)
|
n
| Unadjusted PRR (95% CI) | Model 1a PRR (95% CI) | Model 2b PRR (95% CI) | |
---|---|---|---|---|
Time from diagnosis to screening (in years) | ||||
> 10 | 3208 | 1 (ref.) | 1 (ref.) | 1 (ref.) |
> 5–10 | 1174 | 0.98 (1.87–1.10) | 1.00 (0.89–1.12) | 0.97 (0.87–1.09) |
> 1–5 | 1569 |
1.18 (1.07–1.30)
|
1.18 (1.06–1.30)
| 1.00 (0.90–1.12) |
0–1 | 687 |
1.83 (1.63–2.06)
|
1.80 (1.60–2.01)
| 1.07 (0.93–1.23) |
Non-participation among subgroups of cancer patients
n
| Unadjusted PRR (95%CI) | Model 1 PRR (95%CI) | |
---|---|---|---|
Gynaecological cancer | |||
No | 4190 | 1 (ref.) | 1 (ref.) |
Yes | 1605 | 1.10 (1.00–1.23) |
1.12 (1.01–1.24)
|
Colorectal cancer | |||
No | 5120 | 1 (ref.) | 1 (ref.) |
Yes | 665 |
0.79 (0.66–0.94)
|
0.82 (0.69–0.96)
|
Haematological cancer | |||
No | 5538 | 1 (ref.) | 1 (ref.) |
Yes | 240 | 1.11 (0.89–1.37) | 1.09 (0.87–1.35) |
Lung cancer | |||
No | 5565 | 1 (ref.) | 1 (ref.) |
Yes | 218 |
1.38 (1.11–1.72)
| 1.18 (0.94–1.48) |
Malignant melanoma | |||
No | 4980 | 1 (ref.) | 1 (ref.) |
Yes | 808 |
0.58 (0.48–0.71)
|
0.66 (0.54–0.80)
|
Other cancer types | |||
No | 4773 | 1 (ref.) | 1 (ref.) |
Yes | 1019 |
1.17 (1.03–1.33)
|
1.16 (1.02–1.32)
|