Table 4

Differences in mental component scores between subgroups at all time points

Mental component score

Parameter

Range

%

Pre-morbid

3 months

6 months

1 year

2.5 years

5 years

Age

≤ 64 years

184 (61)

44.2

(14.4)

49.2

(11.5)

50.2

(11.8)

50.7

(12.0)

53.7

(9.6)

52.7

(11.6)

> 64 years

116 (39)

47.2

(12.6)

53.2

(10.7)

56.7

(8.6)

56.0

(8.4)

55.1

(8.6)

56.5

(11.6)

P value

0.06

0.02

< 0.001

0.002

0.40

0.13

APACHE II

≤ 18

158 (53)

46.5

(14.3)

50.9

(11.6)

52.1

(11.1)

51.7

(11.7)

53.8

(9.2)

53.5

(11.1)

> 18

142 (47)

44.1

(13.1)

50.3

(11.2)

53.1

(11.3)

53.7

(10.4)

54.5

(9.4)

54.4

(12.6)

P value

0.12

0.74

0.55

0.27

0.68

0.71

LOS

≤ 2 days

162 (54)

45.9

(13.7)

51.2

(11.9)

53.1

(11.3)

51.2

(12.0)

53.8

(9.1)

54.9

(10.6)

> 2 days

136 (46)

44.7

(13.9)

50.0

(10.6)

51.8

(11.1)

54.2

(9.8)

54.5

(9.5)

52.6

(13.0)

P value

0.43

0.44

0.46

0.10

0.70

0.36

Type of

Admission

Surgical

106 (35)

46.7

(12.5)

52.2

(11.2)

53.6

(10.5)

52.1

(10.7)

54.3

(7.2)

54.9

(10.6)

Medical

118 (39)

43.1

(13.8)

49.5

(12.3)

51.6

(12.8)

54.1

(11.4)

54.1

(10.5)

53.8

(14.0)

P value

0.04

0.17

0.32

0.35

0.94

0.70

Long-term survival

Survivor

197 (66)

47.9

(12.7)

53.1

(9.4)

53.5

(9.6)

53.2

(10.1)

54.9

(8.5)

53.9

(11.7)

Non-survivor

103 (34)

44.0

(14.2)

48.1

(12.6)

51.2

(12.9)

51.1

(13.2)

50.8

(11.8)

.

.

P value

0.016

0.002

0.196

0.338

0.117

Data presented as means and standard deviations. All subgroups are dichotomised around the median values for all intensive care unit (ICU) admissions. APACHE = acute physiology, age and chronic health evaluation; LOS = length of stay.

Cuthbertson et al. Critical Care 2010 14:R6   doi:10.1186/cc8848