Table 1.
Characteristics of persons with matched and unmatched cancers in the Rotterdam Study and the Netherlands Cancer Registry
| Persons with unmatched cancers (n = 397) | |||
|---|---|---|---|
| Characteristic | Persons with matched cancers (n = 2,227) | Rotterdam study (n = 284) | Netherlands Cancer Registry (n = 115) |
| Age at study entry, years, median (IQR) | 65.1 (11.5) | 71.5 (13.0) | 69.0 (11.8) |
| Sex, women, n (%) | 1,081 (48.5) | 151 (53.2) | 61 (53.0) |
| Education, n (%)1 | |||
| Primary | 395 (17.7) | 69 (24.3) | 22 (19.1) |
| Lower | 897 (40.3) | 104 (36.6) | 43 (37.4) |
| Further | 647 (29.1) | 89 (31.3) | 33 (28.7) |
| Higher | 261 (11.7) | 19 (6.9) | 15 (13.0) |
| Age at first cancer diagnosis, years, n (%) | |||
| 45–65 | 355 (15.9) | 16 (5.6) | 10 (8.7) |
| 65–75 | 856 (38.4) | 50 (17.6) | 27 (23.5) |
| 75–85 | 794 (35.7) | 126 (44.4) | 51 (44.3) |
| >85 | 222 (10.0) | 92 (32.4) | 27 (23.4) |
| Mean (SD) | 74.0 (8.5) | 80.5 (8.6) | 78.2 (9.1) |
Persons in Rotterdam Study or Netherlands Cancer Registry do not sum up to total number of persons with unmatched cancers since some persons with unmatched cancers overlap. Numbers of education are shown without imputation and therefore do not sum up to 100%.
Education levels were assessed during home interviews according to the following categories: primary: primary education, lower: lower/intermediate general education/lower vocational education, intermediate: intermediate vocational education/higher general education or higher: higher vocational education/university.
Abbreviations: IQR, interquartile range; SD, standard deviation.