Table 1 Demographics of the study population

Total number of patients

73,024

3680

76,704

Mortality 365 days from admission

18,840 (25.8%)

2605 (70.8%)

21,477 (28.0%)

 0–28 nights

3615 (19.2%)

1433 (55.0%)

5048 (23.5%)

 29–180 nights

9587 (50.8%)

964 (37.0%)

10,551 (49.2%)

 181–365 nights

5657 (30.0%)

209 (8.0%)

5866 (27.3%)

 Mean (SD)

76.8 (15.9)

73.9 (12.8)

76.7 (15.8)

 Median (IQR)

81 (71–88)

76 (67–83)

81 (70–88)

 18–39

3226 (4.4%)

60 (1.6%)

3286 (4.3%)

 40–64

9103 (12.5%)

685 (18.6%)

9788 (12.8%)

 65–74

10,927 (15.0%)

976 (26.5%)

11,903 (15.5%)

 75–84

21,848 (29.9%)

1194 (32.5%)

23,042 (30.0%)

 85–94

24,657 (33.8%)

713 (19.4%)

25,370 (33.1%)

 95+

3263 (4.5%)

52 (1.4%)

3315 (4.3%)

 Female

43,228 (59.2%)

1932 (52.5%)

45,100 (58.8%)

 Male

29,793 (40.8%)

1748 (47.5%)

31,601 (41.2%)

 White

69,892 (95.7%)

3574 (97.1%)

73,466 (95.8%)

 Black and ethnic minority

1930 (2.6%)

41 (1.1%)

1971 (2.6%)

 Unknown

1202 (1.7%)

65 (1.8%)

1267 (1.7%)

 Median (IQR)

1 (0–3)

8 (3–9)

2 (0–3)

 Range

0–18

2–17

0–18

 0

20,155 (27.6%)

0 (0.0%)

20,155 (26.3%)

 1–2

28,386 (38.9%)

713 (19.4%)

29,099 (37.9%)

 3–4

15,275 (20.9%)

667 (18.1%)

15,942 (20.8%)

 ≥ 5

9208 (12.6%)

2300 (62.5%)

11,508 (15.0%)

 Elective

16,535 (22.7%)

1257 (34.2%)

17,828 (23.3%)

 Non-elective

56,307 (77.3%)

2418 (65.8%)

58,689 (76.7%)

 Hospital (ED or general hospital)

33,553 (46.0%)

1360 (37.0%)

34,913 (45.5%)

 Home (personal dwelling/care home)

36,585 (50.1%)

2286 (62.1%)

38,871 (50.7%)

 Other

617 (0.8%)

15 (0.4%)

632 (0.8%)

 Unknown

2269 (3.1%)

19 (0.5%)

2288 (3.0%)

 Median (IQR)

17 (5–34)

8 (5–34)

17 (5–34)

 Range

0–1073

0–190

0–1073

 0–25 nights

46,916 (64.6%)

2961 (80.6%)

49,877 (65.4%)

 26+ nights

25,733 (35.4%)

712 (19.4%)

26,445 (34.7%)