Table 1 Cohort description at the time of index hospitalisation 2010–2012, by multimorbidity and frailty risk.
Total | Multimorbidity and frailty risk | p-value | ||||
|---|---|---|---|---|---|---|
Neither | Elevated frailty risk only | Multimorbid only | Both | |||
N = 257,535 | n = 81,788 | n = 51,279 | n = 37,949 | n = 86,519 | ||
Sex, n (%) | ||||||
Male | 110,125 (42.8) | 34,363 (42.0) | 17,134 (33.4) | 19,587 (51.6) | 39,041 (45.1) | < 0.01 |
Female | 147,410 (57.2) | 47,425 (58.0) | 34,145 (66.6) | 18,362 (48.4) | 47,478 (54.9) | |
Median age (IQR) | 83.3 (79.2–87.7) | 81.9 (78.3–86.2) | 84.9 (80.6–89.3) | 82.0 (78.4 – 86.1) | 84.4 (80.1 – 88.6) | < 0.01 |
Age, n (%) | ||||||
75–79 | 76,233 (29.6) | 30,169 (36.9) | 11,343 (22.1) | 13,716 (36.1) | 21,005 (24.3) | < 0.01 |
80–84 | 78,766 (30.6) | 26,181 (32.0) | 14,550 (28.4) | 12,509 (33.0) | 25,526 (29.5) | |
85–89 | 63,894 (24.8) | 16,824 (20.6) | 14,359 (28.0) | 8,098 (21.3) | 24,613 (28.4) | |
90 + | 38,642 (15.0) | 8,614 (10.5) | 11,027 (21.5) | 3,626 (9.6) | 15,375 (17.8) | |
Aboriginal and Torres Strait Islander status, n (%) | ||||||
Non-Aboriginal | 256,100 (99.4) | 81,332 (99.4) | 51,074 (99.6) | 37,697 (99.3) | 85,997 (99.4) | < 0.01 |
Aboriginal | 1435 (0.6) | 456 (0.6) | 205 (0.4) | 252 (0.7) | 522 (0.6) | |
Socioeconomic status quartiles, n(%) | ||||||
Most disadvantaged | 66,279 (25.7) | 21,889 (26.8) | 12,215 (23.8) | 10,597 (27.9) | 21,578 (24.9) | < 0.01 |
2 | 54,192 (21) | 17,996 (22.0) | 10,491 (20.5) | 8,137 (21.4) | 17,568 (20.3) | |
3 | 46,441 (18) | 14,943 (18.3) | 9478 (18.5) | 6,694 (17.6) | 15,326 (17.7) | |
4 | 47,350 (18.4) | 14,512 (17.7) | 9868 (19.2) | 6,600 (17.4) | 16,370 (18.9) | |
Most advantaged | 40,911 (15.9) | 11,904 (14.6) | 8687 (16.9) | 5,681 (15.0) | 14,639 (16.9) | |
Missing | 2362 (0.9) | 544 (0.7) | 540 (1.1) | 240 (0.6) | 1,038 (1.2) | |
Admission type, n (%) | ||||||
Medical | 224,949 (87.3) | 71,714 (87.7) | 44,897 (87.6) | 32,486 (85.6) | 75,852 (87.7) | < 0.01 |
Surgical | 23,339 (9.1) | 7020 (8.6) | 5374 (10.5) | 3,010 (7.9) | 7,935 (9.2) | |
Other | 9247 (3.6) | 3054 (3.7) | 1008 (2.0) | 2,453 (6.5) | 2,732 (3.2) | |
Number of prior admissions over 2 years, excluding index admission, n (%) | ||||||
0 | 84,775 (32.9) | 43,072 (52.7) | 17,527 (34.2) | 11,471 (30.2) | 12,705 (14.7) | < 0.01 |
1 | 62,827 (24.4) | 20,433 (25.0) | 14,370 (28.0) | 10,092 (26.6) | 17,932 (20.7) | |
2 or more | 109,933 (42.7) | 18,283 (22.4) | 19,382 (37.8) | 16,386 (43.2) | 55,882 (64.6) | |
Median HFRS (IQR) | 5.5 (1.9–12.0) | 1.6 (0–3) | 9.0 (6.6–13.2) | 2.0 (0.7–3.4) | 13.3 (8.6–20.3) | < 0.01 |
Median number of chronic conditions (IQR) | 1 (0–3) | 0 (0–1) | 1 (0–1) | 2 (2–3) | 3 (2–5) | < 0.01 |
