Table 2 Distribution of cognitive function measured by CMMSE in pneumoconiosis patients and community referents.

From: Association of circadian rhythm with mild cognitive impairment among male pneumoconiosis workers in Hong Kong: a cross-sectional study

Variable

Community referents (N = 208)

Pneumoconiosis workers (N = 186)

P value

Mean

SD

Mean

SD

Global score

26.4

3.4

25.7

3.4

0.045

Component scores

 1. Orientation

9.41

1.27

9.09

1.22

0.011

 2. Registration

2.86

0.52

2.87

0.43

0.92

 3. Attention and calculation

3.73

1.6

3.65

1.59

0.64

 4. Recall

2.12

0.98

2.03

1.01

0.35

 5. Language

8.24

1.11

8.04

1.25

0.098

 

n

%

n

%

 

Status of cognitive impairment

    

0.024

Normal cognition (27–30)

132

63.5

93

50.0

 

Mild cognitive impairment (21–26)

61

29.3

72

38.7

 

Cognitive impairment (0–20)

15

7.2

21

11.3

 

Composite outcome (0–26)a

76

36.5

93

50.0

0.007

  1. CMMSE Cantonese version of Mini-Mental State Examination; SD standard deviation.
  2. aComposite outcome refers to the prevalence of MCI plus cognitive impairment.
Back to article page