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Table 1 Comparison of study group with three other patient groups

From: The Revised Identification of Seniors At Risk screening tool predicts readmission in older hospitalized patients: a cohort study

Baseline

A

B

C

D

 

Study Sample (n = 386)

Incomplete ISAR (n = 12)

Not Discharged Home (n = 87)

Not in Study (n = 2878)

Chi-square Test

 

%

%

%

%

A vs B

A vs C

A vs D

Hospital

    

0.020

 < 0.001

0.065

 1

49.2

83.3

79.3

54.2

   

 2

50.8

16.7

20.7

45.8

   

Unit

    

0.481

0.132

0.419

 Geriatric

22.3

33.3

29.9

24.2

   

 Medical

77.7

66.7

70.1

75.8

   

Age group

    

0.351

0.072

0.001

 65–74

21.2

16.7

11.6

19.8

   

 75–84

41.5

25.0

40.7

33.5

   

 85 + 

37.3

58.3

47.7

46.7

   

Female

57.3

58.3

57.5

60.1

0.941

0.971

0.282

Previous hospital admission (6-month)**

21.2

0

26.4

15.3

0.138

0.292

0.003

Charlson Comorbidity Index,

    

0.845

0.279

0.177

 0

22.8

25.0

17.2

22.5

   

 1

18.9

25.0

13.8

15.1

   

 2–3

35.2

25.0

44.8

39.6

   

 4 + 

23.1

25.0

24.1

22.8

   

Length of stay on unit, median [Q1-Q3]

6 [3–10]

5 [2–8]

6 [3–13]

5 [2–8]

0.330a

0.977a

 < 0.001a

Length of stay overall, median [Q1-Q3]

8 [6–15]

6.5 [8.5—14.5]

21 [12—36]

7 [4–14]

0.984a

 < 0.001a

 < 0.001a

Language spoken at home

   

NA

0.348

0.541

NA

 English

54.4

75.0

60.9

    

 French

25.1

8.3

21.8

    

 Other

20.5

16.7

17.2

    

Born in Canada

59.3

66.7

64.4

NA

0.610

0.385

 

Informant

   

NA

0.398

 < 0.001

 

 Patient

84.7

75.0

67.8

    

 Caregiver

15.3

25.0

32.2

    

Homecare services

26.5

45.5

32.9

NA

0.176

0.225

 

 (missing)

(5)

(1)

(2)

    

Days from unit admission, mean (SD)

5.9 (5.3)

6.2 (6.0)

6.5 (11.0)

NA

0.848b

0.613b

 

ISAR question*

   

NA

   

 1: Help on regular basis

39.4

50.0

39.3

 

0.526

0.987

 

 2: More help before hospitalization

45.6

30.0

52.9

 

0.522

0.219

 

 3: Previous hospitalization (6 m)

36.3

45.5

36.5

 

0.539

0.972

 

 4: Problem with vision

25.7

41.7

26.7

 

0.313

0.834

 

 5: Problem with memory

12.4

25.0

36.8

 

0.269

 < 0.001

 

 6: Polypharmacy

61.1

44.4

52.9

 

0.323

0.156

 

Overall score, mean (SD)

2.2 (1.4)

2.0 (1.3)

2.4 (1.5)

 

0.606b

0.202b

 

Outcomes:

  30-day readmission

13.2

8.3

14.9

11.7

1.000

0.670

0.403

  90-day readmission

24.9

33.3

24.1

21.0

0.506

0.886

0.081

  1. Significant p-values are in bold font (at 0.016 after Bonferroni correction)
  2. a Kruskall Wallis Test
  3. b One way ANOVA model; NA: Not Available
  4. * ISAR question with 1 to 5 missing in Group B and C
  5. ** From the administrative database