Table 1 Patient characteristics at baseline grouped by in-hospital healthcare contact level

From: Machine learning-based predictions of healthcare contacts following emergency hospitalisation using electronic health records

 

All (n = 98242)

Healthcare contact frequency quintile

VL (n = 9687)

L (n = 26,994)

M (n = 21,841)

H (n = 19,981)

VH (n = 19,739)

Age (mean, SD)

72 (12)

68 (12)

69 (12)

71 (12)

73 (12)

71 (11)

Women

50,214 (51%)

4863 (50%)

13,246 (49%)

10,695 (49%)

10,423 (52%)

10,987 (56%)

SIMD in quintiles

 

 1 (most deprived)

15,735 (16%)

1634 (17%)

4415 (16%)

3633 (17%)

3101 (16%)

2952 (15%)

 2–4

57608 (59%)

5665 (59%)

15818 (59%)

12852 (59%)

11842 (59%)

11431 (58%)

 5 (least deprived)

24,899 (25%)

2388 (25%)

6761 (25%)

5356 (25%)

5038 (25%)

5356 (27%)

Attending hospital

 

 RIE

49,891 (50%)

5279 (55%)

14,290 (53%)

11,473 (53%)

9620 (48%)

9229 (47%)

 WGH

29940 (31%)

2876 (30%)

7809 (29%)

6201 (28%)

6207 (31%)

6847 (35%)

 SJH

18,411 (19%)

1532 (16%)

4895 (18%)

4167 (19%)

4154 (21%)

3663 (19%)

Medical condition history

 

 # Long-term conditions (median, IQR)

3 [2, 5]

3 [2, 5]

3 [2, 5]

3 [2, 5]

4 [2, 5]

4 [3, 5]

 Simple Multimorbidity (\(\ge\)2 conditions)

33,534 (34%)

3440 (36%)

9656 (36%)

7535 (35%)

6546 (33%)

6357 (32%)

 High-count Multimorbidity (\(\ge\)4 conditions)

48,655 (50%)

4107 (42%)

11,934 (44%)

10,603 (49%)

10,722 (54%)

11,289 (57%)

 Physical-mental Multimorbidity (\(\ge\)1 physical and \(\ge\)1 mental condition)

36,096 (37%)

3547 (37%)

10,033 (37%)

8093 (37%)

7402 (37%)

7021 (36%)

Nursing assessments

 

 4AT score (\(\ge\)4, at risk)

6540 (7%)

132 (1%)

675 (3%)

1084 (5%)

1797 (9%)

2852 (14%)

 MUST score (\(\ge\)2, at high risk)

5911 (6%)

119 (1%)

650 (2%)

842 (4%)

1377 (7%)

2923 (15%)

 Waterlow score (\(\ge\)10, at risk)

17,023 (17%)

801 (8%)

2660 (10%)

3181 (15%)

4323 (22%)

6058 (31%)

 Fall event within 6 months of admission

16,043 (16%)

350 (4%)

2149 (8%)

2721 (13%)

4052 (20%)

6771 (34%)

 Walking dependence

17,074 (21%)

1412 (15%)

6341 (24%)

5434 (25%)

4338 (22%)

3105 (16%)

 Bathing dependence

20,160 (21%)

1473 (15%)

6816 (25%)

5727 (26%)

4401 (22%)

2428 (12%)

 Swallowing difficulties

1719 (2%)

26 (<1%)

136 (1%)

175 (1%)

333 (2%)

1049 (5%)

Secondary outcomes

 

 In-hospital death

6093 (6%)

202 (2%)

592 (2%)

931 (4%)

1720 (9%)

2648 (13%)

 Extended stay (\(\ge\)14 days)

19,040 (19%)

307 (3%)

625 (2%)

671 (3%)

2113 (11%)

15,324 (78%)

 Non-home discharge

12,938 (13%)

443 (5%)

1297 (5%)

1711 (8%)

2907 (15%)

5980 (30%)

 Admission to Geriatric Medicine services

13,301 (14%)

392 (4%)

1044 (4%)

1445 (7%)

2843 (14%)

7577 (38%)

  1. The contact frequency group was defined through binning the total health contacts variable into five equally-sized partitions. Values are displayed in patient counts (%) unless stated otherwise. Statistical testing: one-way analysis of variance (ANOVA) test in numerical data, Chi-squared test in categorical data. Contact frequency groups: VL—very low, L—low, M—medium, H—high, VH—very high.
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