Table 1.
Demographic characteristics of overall population, and stratified by year
| Parameter | Variable | At index date | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 |
|---|---|---|---|---|---|---|---|---|---|
| (N = 58,958) | (N = 11,515) | (N = 14,030) | (N = 17,485) | (N = 23,086) | (N = 31,212) | (N = 40,399) | (N = 48,364) | ||
| n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | ||
| Gender | Male | 32,698 (55.5) | 6,429 (55.8) | 7,850 (56.0) | 9,732 (55.7) | 12,859 (55.7) | 17,314 (55.5) | 22,313 (55.2) | 26,548 (54.9) |
| Female | 26,260 (44.5) | 5,086 (44.2) | 6,180 (44.1) | 7,753 (44.3) | 10,227 (44.3) | 13,898 (44.5) | 18,086 (44.8) | 21,816 (45.1) | |
| Age group, yearsa | 18–34 | 2,409 (4.1) | 264 (2.3) | 340 (2.4) | 460 (2.6) | 662 (2.9) | 979 (3.1) | 1,250 (3.1) | 1,472 (3.0) |
| 35–44 | 5,293 (9.0) | 823 (7.1) | 1,002 (7.1) | 1,268 (7.3) | 1,693 (7.3) | 2,283 (7.3) | 2,962 (7.3) | 3,365 (7.0) | |
| 45–54 | 8,897 (15.1) | 1,529 (13.3) | 1,796 (12.8) | 2,240 (12.8) | 2,978 (12.9) | 4,173 (13.4) | 5,438 (13.5) | 6,529 (13.5) | |
| 55–64 | 14,334 (24.3) | 3,210 (27.9) | 3,803 (27.1) | 4,416 (25.3) | 5,543 (24.0) | 7,100 (22.8) | 8,725 (21.6) | 10,087 (20.9) | |
| 65–74 | 17,434 (29.6) | 3,410 (29.6) | 4,148 (29.6) | 5,318 (30.4) | 7,233 (31.3) | 9,914 (31.8) | 13,054 (32.3) | 15.471 (32.0) | |
| 75 + | 10,591 (18.0) | 2,279 (19.8) | 2,941 (21.0) | 3,783 (21.6) | 4,977 (21.6) | 6,763 (21.7) | 8,980 (22.2) | 11,440 (23.7) | |
| Age, yearsa | Mean (SD) | 61.63 (13.99) | 63.29 (12.93) | 63.55 (13.09) | 63.63 (13.28) | 63.58 (13.48) | 63.49 (13.67) | 63.65 (13.72) | 64.00 (13.76) |
| Median (IQR) | 64 (19) | 64 (17) | 65 (17) | 65 (17) | 65 (17) | 65 (18) | 66 (19) | 66 (19) |
aFor the calendar year analyses, the age of patients in each calendar year cohort was obtained at their first claim within the calendar year. Patients who had at least one claim in a particular year were included in that year’s analysis
IQR interquartile range, SD standard deviation