Table 2 Characteristics of the index hospitalization, 30-day readmission and mortality

All cause 30-day inpatient or observation stay readmission

7093 (12.6%)

1562 (17.3%)

9540 (13.6%)

11,093 (14.2%)

29,288 (13.7%)

–

–

30-day mortality

605 (1.1%)

324 (3.6%)

683 (1.0%)

1503 (1.9%)

3115 (1.5%)

–

–

  Home/clinic

46,209 (82%)

7297 (81%)

60,593 (86.6%)

68,386 (87.5%)

182,485 (85.5%)

0.09

0.02

  Hospital/SNF

9912 (17.6%)

1628 (18.1%)

8748 (12.5%)

9157 (11.7%)

29,445 (13.8%)

0.06

0.03

  Other

204 (0.4%)

45 (0.5%)

608 (0.9%)

493 (0.6%)

1350 (0.6%)

0.01

0.00

  Surgical

9775 (17.3%)

1773 (19.7%)

40,411 (57.7%)

48,886 (62.6%)

100,845 (47.2%)

0.45

0.03

  Medicine

46,608 (82.7%)

7236 (80.3%)

29,586 (42.3%)

29,238 (37.4%)

112,668 (52.8%)

–

–

  Diseases/Disorders of the Circulatory System

11,626 (37.6%)

1623 (5.2%)

10,512 (34%)

7173 (23.2%)

30,934 (14.5%)

0.11

0.05

  Diseases/Disorders of the Musculoskeletal System

2421 (8.5%)

696 (2.5%)

9188 (32.4%)

16,049 (56.6%)

28,354 (13.3%)

0.16

0.05

  Infectious & Parasitic Diseases, Systemic or Unspecified Sites

11,584 (42.4%)

1845 (6.7%)

6574 (24%)

7343 (26.9%)

27,346 (12.8%)

0.11

0.04

  Diseases/Disorders of the Digestive System

6672 (27.5%)

977 (4%)

7443 (30.7%)

9187 (37.8%)

24,279 (11.4%)

0.01

0.02

  Diseases/Disorders of the Nervous System

4946 (33.2%)

595 (4%)

4431 (29.7%)

4940 (33.1%)

14,912 (7%)

0.02

0.03

  Endocrine, Nutritional & Metabolic Diseases & Disorders

1922 (15.4%)

362 (2.9%)

3528 (28.3%)

6635 (53.3%)

12,447 (5.8%)

0.05

0.01

  Diseases/Disorders of the Respiratory System

4985 (40.7%)

822 (6.7%)

3111 (25.4%)

3317 (27.1%)

12,235 (5.7%)

0.05

0.02

  Diseases/Disorders of the Hepatobiliary System

3212 (27.4%)

420 (3.6%)

3373 (28.7%)

4739 (40.4%)

11,744 (5.5%)

0.01

0.01

  Laboratory Acute Physiology Score (LAPS2)

70.1 (30.42)

73.4 (31.94)

57.8 (27.98)

56.2 (28.43)

61.1 (29.66)

0.58

0.03

  LACE readmission risk score

10.4 (2.80)

11.2 (2.93)

8.0 (3.59)

7.0 (3.66)

8.4 (3.70)

  LACE < 11

26,301 (46.6%)

2810 (31.2%)

52,055 (74.4%)

64,181 (82.2%)

145,347 (68.1%)

0.51

0.02

  LACE 11 to 15

28,897 (51.3%)

5787 (64.2%)

16,928 (24.2%)

12,997 (16.6%)

64,609 (30.3%)

0.48

0.04

  LACE 16 to 19

1185 (2.1%)

412 (4.6%)

1014 (1.4%)

946 (1.2%)

3557 (1.7%)

0.03

0.01

  0–3 days

29,460 (52.2%)

4044 (44.9%)

44,692 (63.8%)

57,202 (73.2%)

135,398 (63.4%)

0.28

0.05

  4–6 days

17,659 (31.3%)

2998 (33.3%)

16,312 (23.3%)

14,789 (18.9%)

51,758 (24.2%)

0.14

0.04

  7–13 days

7491 (13.3%)

1427 (15.8%)

7221 (10.3%)

4913 (6.3%)

21,052 (9.9%)

0.10

0.02

  14+ days

1773 (3.1%)

540 (6%)

1772 (2.5%)

1220 (1.6%)

5305 (2.5%)

0.04

0.02

  Non-ambulatory

6177 (11%)

2231 (24.8%)

7213 (10.3%)

11,525 (14.8%)

27,146 (12.7%)

0.14

0.01

  Ambulatory with assistance

27,514 (48.8%)

4057 (45%)

27,458 (39.2%)

29,276 (37.5%)

88,305 (41.4%)

0.11

0.00

  Ambulatory

21,965 (39%)

2569 (28.5%)

28,967 (41.4%)

30,000 (38.4%)

83,501 (39.1%)

0.13

0.01

  Missing

727 (1.3%)

152 (1.7%)

6359 (9.1%)

7323 (9.4%)

14,561 (6.8%)

0.08

0.00

 Schmid fall risk score 3+ within 24 h of discharge

9354 (16.6%)

2107 (23.4%)

11,882 (17%)

14,608 (18.7%)

37,951 (17.8%)

0.07

0.01

  Home

36,726 (65.1%)

4755 (52.8%)

49,184 (70.3%)

55,429 (71%)

146,094 (68.4%)

0.18

0.01

  Home health

19,657 (34.9%)

4254 (47.2%)

20,813 (29.7%)

22,695 (29%)

67,419 (31.6%)

–

–