Table 1. Demographic Characteristics.
| Characteristic | Patients, No. (%) | ||||
|---|---|---|---|---|---|
| 2014 (n = 13 373 850) | 2015 (n = 13 892 278) | 2016 (n = 14 606 462) | 2017 (n = 15 168 134) | 2018 (n = 15 364 606) | |
| Age, mean (SD), y | 75.7 (7.5) | 75.6 (7.5) | 75.6 (7.4) | 75.3 (7.3) | 75.2 (7.3) |
| Womena | 8 181 647 (61.2) | 8 427 817 (60.7) | 8 790 466 (60.2) | 9 087 295 (59.9) | 9 155 596 (59.6) |
| Race/ethnicity | |||||
| White | 11 514 521 (86.1) | 12 002 445 (86.4) | 12 593 233 (86.2) | 12 998 486 (85.7) | 13 212 850 (86.0) |
| Black | 982 374 (7.3) | 991 175 (7.1) | 1 015 617 (7.0) | 1 015 630 (6.7) | 984 722 (6.4) |
| Other | 792 794 (5.9) | 771 152 (5.6) | 819 599 (5.6) | 866 004 (5.7) | 886 983 (5.8) |
| Unknown or missing race/ethnicity | 84 161 (0.63) | 127 506 (0.92) | 178 013 (1.2) | 288 014 (1.9) | 280 051 (1.8) |
a
Among 21 045 759 unique individuals, 1 had missing sex information. This individual was present in the analysis from 2015 to 2018 but not in 2014.