All eligible patients, N (%)† 5538 (100) | Matched cases, N (%)† 1200 (100) | P value* | |
Age, years | 0.003 | ||
18–54 | 967 (17.5) | 234 (19.5) | |
55–70 | 2431 (43.9) | 551 (45.9) | |
>70 | 2139 (38.6) | 415 (34.6) | |
Sex | 0.647 | ||
Female | 2732 (49.3) | 599 (49.9) | |
Male | 2806 (50.7) | 601 (50.1) | |
Cancer site | <0.001 | ||
Breast | 872 (15.8) | 201 (16.8) | |
Digestive organs | 1157 (20.9) | 278 (23.2) | |
Respiratory organs | 676 (12.2) | 108 (9.0) | |
Skin (melanoma) | 357 (6.5) | 98 (8.2) | |
Lip, oral cavity and pharynx | 149 (2.7) | 24 (2.0) | |
Female genital organs | 299 (5.4) | 87 (7.3) | |
Male genital organs | 759 (13.7) | 179 (14.9) | |
Urinary tract | 315 (13.7) | 56 (4.7) | |
Neuroendocrine tumours | 326 (5.9) | 55 (4.6) | |
Lymphoid and haematopoitic tissue | 403 (7.3) | 79 (6.6) | |
Other | 225 (4.0) | 35 (2.9) | |
Marital status | <0.001 | ||
Cohabiting | 3662 (66.1) | 877 (73.1) | |
Living alone | 1850 (33.4) | 321 (26.8) | |
Ethnicity | 0.402 | ||
Ethnic Danes | 5325 (96.2) | 1162 (97.0) | |
Immigrant/descendant | 187 (3.4) | 36 (3.0) | |
Occupation | <0.001 | ||
In the labour force | 1885 (34.0) | 480 (40.0) | |
Retired/students | 3057 (55.2) | 636 (53.0) | |
Outside the labour force | 582 (10.5) | 83 (6.9) | |
OECD-modified household income | <0.001 | ||
Low (<20.024€/year) | 1202 (21.7) | 201 (16.8) | |
Middle (20.024–53.620€/year) | 4000 (72.2) | 913 (76.1) | |
High (>53.620€/year) | 310 (5.6) | 84 (7.0) | |
Education | <0.001 | ||
>10 years | 2104 (38.0) | 405 (33.8) | |
11–15 years | 2345 (42.3) | 532 (44.3) | |
>15 years | 929 (16.8) | 237 (19.8) |
*χ2 test. Since one of the assumptions of the χ2 test is independency of observations, we tested the difference between respondents and all eligible patients without the respondents, that is, 3356 persons.
†Percentages may not add up to 100% because of missings.
GP, general practitioner.