Table 1. Characteristics of Enrollees 18 Years and Older in the US, 2018-2021a.
| Characteristic | Year | |||
|---|---|---|---|---|
| 2018 (n = 17 255 033 [8 846 497 female and 8 408 536 male]) | 2019 (n = 17 340 731 [8 948 495 female and 8 392 236 male]) | 2020 (n = 16 916 910 [8 783 927 female and 8 132 983 male]) | 2021 (n = 15 135 998 [7 939 181 female and 7 196 817 male]) | |
| Total | ||||
| Age, y | ||||
| Mean (SD) | 51.7 (19.5) | 52.5 (19.7) | 53.7 (19.8) | 56.2 (19.8) |
| Median (IQR) | 52.0 (35.0-68.0) | 53.0 (35.0-69.0) | 55.0 (36.0-70.0) | 59.0 (39.0-72.0) |
| Region | ||||
| Northeast | 1 788 695 (10.7) | 1 842 159 (10.9) | 1 823 130 (11.1) | 1 659 741 (11.2) |
| Midwest | 3 822 866 (22.8) | 3 839 035 (22.7) | 3 836 297 (23.3) | 3 500 192 (23.6) |
| South | 7 308 215 (43.5) | 7 341 042 (43.5) | 7 044 844 (42.7) | 6 206 420 (41.9) |
| West | 3 867 511 (23.0) | 3 859 491 (22.9) | 3 792 291 (23.0) | 3 437 509 (23.2) |
| Female | ||||
| Age, y | ||||
| Mean (SD) | 53.1 (19.8) | 53.9 (20.0) | 55.2 (20.0) | 57.6 (19.9) |
| Median (IQR) | 54.0 (36.0-70.0) | 55.0 (36.0-70.0) | 57.0 (38.0-71.0) | 62.0 (41.0-73.0) |
| Region | ||||
| Northeast | 933 563 (10.8) | 962 985 (11.0) | 957 662 (11.1) | 875 002 (11.2) |
| Midwest | 1 948 698 (22.5) | 1 969 337 (22.5) | 1 979 151 (23.0) | 1 818 739 (23.3) |
| South | 3 782 107 (43.7) | 3 825 449 (43.7) | 3 695 201 (42.9) | 3 293 078 (42.2) |
| West | 1 995 690 (23.0) | 2 001 872 (22.9) | 1 980 486 (23.0) | 1 810 926 (23.2) |
| Male | ||||
| Age, y | ||||
| Mean (SD) | 50.2 (19.1) | 51.0 (19.3) | 52.2 (19.4) | 54.7 (19.6) |
| Median (IQR) | 50.0 (34.0-66.0) | 51.0 (34.0-67.0) | 53.0 (35.0-68.0) | 57.0 (38.0-71.0) |
| Region | ||||
| Northeast | 854 977 (10.5) | 879 049 (10.8) | 865 286 (11.0) | 784 560 (11.2) |
| Midwest | 1 873 876 (23.1) | 1 869 488 (23.0) | 1 856 870 (23.6) | 1 681 142 (24.0) |
| South | 3 525 225 (43.4) | 3 514 882 (43.3) | 3 348 869 (42.5) | 2 912 601 (41.6) |
| West | 1 871 554 (23.0) | 1 857 362 (22.9) | 1 811 372 (23.0) | 1 626 133 (23.2) |
a
Data are presented as number (percentage) of patients unless otherwise indicated. The total number of patients in all years was 7 995 773.