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Table 1 Patient characteristics on ICU admission

From: The Clinical Frailty Scale for mortality prediction of old acutely admitted intensive care patients: a meta-analysis of individual patient-level data

Characteristics on ICU admission

All patients

 < 65 years

 ≥ 65 years

P-value

Patients

23,989

9633

14,356

 

Age [years]

71 [55–82]

50 [37–58]

81 [75–85]

 < 0.0001

SOFA

7 [4–10]

6 [3–9]

7 [4–10]

 < 0.0001

SAPS II

50.5[8, 18, 39–53]

n/a2

50.5 [8, 18, 39–53]

 < 0.0001

APACHE II

20 [14–26]

18 [12–24]

22 [17–28]

 < 0.0001

Male gender

13,626 (56.8)

5669 (58.8)

7956 (55.4)

 < 0.0001

Clinical frailty scale

   

 < 0.0001

 1

2006 (9.1)

1462 (17.3)

544 (4.0)

 

 2

3067 (13.9)

1714 (20.3)

1353 (9.9)

 

 3

4970 (22.5)

1775 (21)

3195 (23.4)

 

 4

4236 (19.2)

1445 (17.1)

2790 (20.4)

 

 5

2867 (13)

785 (9.3)

2082 (15.2)

 

 6

2819 (12.8)

711 (8.4)

2108 (15.4)

 

 7

1599 (7.2)

436 (5.2)

1163 (8.5)

 

 8

425 (1.9)

82 (1.0)

343 (2.5)

 

 9

109 (0.5)

33 (0.4)

76 (0.6)

 

Clinical frailty scale (categories)

   

 < 0.0001

 fit (CFS 1–3)

10,043 (45.4)

4951 (58.6)

5092 (37.3)

 

 vulnerable (CFS 4)

4236 (19.2)

1445 (17.1)

2790 (20.4)

 

 frail (CFS 5–8)

7819 (35.4)

2047 (24.2)

5772 (42.3)

 
  1. Continuous variables: median [IQR]; categorial variables: Number (percentage); N = 23,991 patients; 1 65–69 years; 2 Studies including SAPS II recruited only patients ≥ 65 years