Table 1.
Characteristics of study population by final exposure status (exposure status at end of study all study members were classified as unexposed on entry to the study), based on 12-year period of study (2007–2018) and comparison with Spanish general population on the 31 December 2007
| Age at entry to study (years) | No (%) of people having at least one imaging test in the study* | Total no (%) of people in the study | Total no (%) of Spanish general population | ||||||
| Men | Women | Total | Men | Women | Total | Men | Women | Total | |
| 0 to 5 | 3938 (5.7) | 3693 (5.3) | 7631 (4.9) | 5660 (5.3) | 6564 (5.3) | 12 224 (5.3) | 1 287 417 (5.6) | 1 213 658 (5.1) | 2 501 081 (5.3) |
| >5 to 10 | 3798 (5.5) | 3387 (4.9) | 7185 (4.6) | 5540 (5.1) | 6425 (5.2) | 11 965 (5.1) | 1 259 447 (5.5) | 1 181 161 (4.9) | 2 440 613 (5.2) |
| >10 to 15 | 3611 (5.2) | 3367 (4.9) | 6978 (4.5) | 5199 (4.8) | 6031 (4.9) | 11 230 (4.8) | 1 269 835 (5.5) | 1 194 802 (5.0) | 2 464 643 (5.3) |
| >15 to 20 | 3581 (5.2) | 3253 (4.7) | 6834 (4.4) | 5337 (5.0) | 6189 (5.0) | 11 526 (5.0) | 1 188 946 (5.2) | 1 113 600 (4.7) | 2 302 551 (4.9) |
| >20 to 30 | 8520 (12.3) | 9070 (13.1) | 17 590 (11.4) | 14 419 (13.4) | 16 723 (13.6) | 31 142 (13.4) | 2 476 624 (10.8) | 2 418 216 (10.1) | 4 894 851 (10.4) |
| >30 to 40 | 11 318 (16.3) | 16 291 (23.5) | 27 609 (17.9) | 19 116 (17.8) | 22 171 (18.0) | 41 287 (17.8) | 3 239 875 (14.1) | 3 248 190 (13.6) | 6 488 079 (13.8) |
| >40 to 50 | 10 119 (14.6) | 14 245 (20.6) | 24 364 (15.8) | 16 031 (14.9) | 18 594 (15.1) | 34 625 (14.9) | 3 914 804 (17.0) | 3 837 041 (16.0) | 7 751 862 (16.5) |
| >50 to 60 | 8512 (12.3) | 10 271 (14.8) | 18 783 (12.2) | 12 349 (11.5) | 14 322 (11.6) | 26 671 (11.5) | 3 356 615 (14.6) | 3 431 770 (14.3) | 6 788 400 (14.5) |
| >60 to 70 | 7329 (10.6) | 8764 (12.7) | 16 093 (10.4) | 10 199 (9.5) | 11 829 (9.6) | 22 028 (9.5) | 2 439 786 (10.6) | 2 650 101 (11.1) | 5 089 898 (10.8) |
| >70 to 80 | 5997 (8.7) | 8056 (11.6) | 14 052 (9.1) | 8901 (8.3) | 10 324 (8.4) | 19 225 (8.3) | 1 614 748 (7.0) | 1 975 175 (8.3) | 3 589 930 (7.6) |
| >80 | 2542 (3.7) | 4859 (7.0) | 7401 (4.8) | 4872 (4.5) | 5651 (4.6) | 10 523 (4.5) | 959 627 (4.2) | 1 662 367 (6.9) | 2 621 998 (5.6) |
| Total (no/%) | 69 265 (100.0) | 85 255 (100.0) | 154 520 (100.0) | 107 622 (100.0) | 123 196 (100.0) | 232 446 (100.0) | 23 007 724 (100.0) | 23 926 081 (100.0) | 46 933 905 (100.0) |
*P<0.05: differences in the number of people having at least one imaging test in the study by sex in all age groups and in the total.