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Table 1 Characteristics of critically ill patients who survived to hospital discharge.

From: Risk factors for dementia after critical illness in elderly medicare beneficiaries

 

ICU Cohort (n= 25,368)

 

Number (%)

Index Hospitalization

 

   Age, years: mean ± SD

76.6 ± 6.8

   Female

13,275 (52.3)

   Race

 

non-Hispanic, white

22,602 (89.1)

non-Hispanic, black

1,830 (7.2)

Hispanic

407 (1.6)

Other

529 (2.1)

   ICU length of stay, days: median (IQR)

2 (1 to 5)

   Hospital length of stay, days: median (IQR)

6 (3 to 10)

   Mechanically Ventilated

 

None

23,067 (90.9)

Mechanically Ventilated

2,301 (9.1)

Past Hospitalization History (prior year)

 

   Any previous ICU admission

624 (2.5)

   Any previous hospitalization

4,590 (18.1)

   Number of previous hospitalizations

 

0

20,778 (81.9)

1

3,035 (12.0)

2+

1,555 (6.1)

Prior Diagnoses (prior year) a

 

   None

8,450 (33.3)

   Any potential risk factors for dementia

16,918 (66.7)

Follow-Up

 

   Total follow-up time, years

63543

   Average follow-up time, years: mean ± SD

2.5 ± 0.9

   Diagnosis of Dementia

4,519 (17.8)

   Mortality

 

1 year

3,461 (13.6)

2 year

5,836 (23.0)

3 year

7,746 (30.5)

  1. aBased on ICD-9-CM codes. Full list of diagnoses are available in the Additional file 1. ICD-9-CM, International Classification of Diseases, 9th revision, clinical modification.