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Table 4 Results of multivariable linear regression analyses examining correlates of impulsivity

From: The factor structure of the Barratt Impulsiveness Scale (BIS-11) and correlates of impulsivity among outpatients with schizophrenia and other psychotic disorders in Singapore

 

Non-planninga

Motor impulsivenessb

Lack of Self-controlc

B

95% CI

p

B

95% CI

p

B

95% CI

p

Lower

Upper

Lower

Upper

Lower

Upper

Age

 21 to 34

ref

   

ref

   

ref

   

 35 to 49

0.13

-0.71

0.97

0.76

-1.17

-1.98

-0.37

0.004

-0.11

-0.80

0.57

0.74

 50 to 65

-0.54

-1.77

0.68

0.38

-1.27

-2.45

-0.10

0.03

0.15

-0.86

1.16

0.77

Gender

 Male

ref

   

ref

   

ref

   

 Female

0.29

-0.48

1.07

0.45

-0.55

-1.29

0.19

0.14

-0.25

-0.88

0.39

0.74

Ethnicity

 Chinese

ref

   

ref

   

ref

   

 Malay

-0.73

-1.94

0.49

0.24

-1.24

-2.39

-0.09

0.03

-0.79

-1.78

0.20

0.12

 Indian

-0.33

-1.63

0.97

0.62

-0.30

-1.55

0.95

0.63

0.08

-0.98

1.14

0.88

 Others

-0.33

-2.72

2.06

0.78

-0.70

-3.07

1.67

0.56

-0.52

-2.48

1.44

0.60

Highest education level

 Degree, professional certification, and above

ref

   

ref

   

ref

   

 Primary and below

2.49

0.38

4.60

0.02

0.27

-1.81

2.34

0.80

1.76

0.03

3.50

0.046

 Secondary School

1.48

0.32

2.64

0.01

0.14

-0.96

1.25

0.80

0.29

-0.67

1.24

0.56

 Pre-U/Junior College Vocational Institute/ITE/Diploma

1.16

0.13

2.19

0.03

0.05

-0.93

1.04

0.91

0.13

-0.72

0.99

0.76

Marital Status

 Single

ref

   

Ref

   

ref

   

 Married

-0.31

-1.51

0.89

0.61

0.74

-0.41

1.90

0.21

0.20

-0.78

1.19

0.68

 Divorced/Separated/Widowed

-0.27

-1.80

1.26

0.72

1.47

0.02

2.92

0.046

0.45

-0.79

1.69

0.47

Monthly Personal Income (SGD)

 No income

ref

   

ref

   

ref

   

 Below $2,000

-0.27

-1.13

0.60

0.54

0.31

-0.52

1.13

0.47

0.49

-0.22

1.20

0.18

 $2,000—$3,999

-0.66

-1.96

0.65

0.32

-0.09

-1.33

1.14

0.88

0.42

-0.65

1.48

0.44

 $4,000 and above

-0.13

-2.23

1.96

0.90

0.42

-1.57

2.41

0.68

-0.28

-2.00

1.44

0.75

Lifetime alcohol problems (CAGE)

 No lifetime drinking problem

ref

   

ref

   

ref

   

 Problematic alcohol use

1.29

-0.47

3.05

0.15

1.37

-0.32

3.06

0.11

1.93

0.49

3.38

0.01

Drug abuse (DAST-10)

 No hazardous drug use

ref

   

ref

   

ref

   

 Hazardous drug use

0.89

-0.81

2.59

0.30

0.24

-1.37

1.86

0.77

-0.43

-1.86

1.01

0.56

 Global Symptom Index (SCL-90R)

0.43

-0.02

0.88

0.06

2.26

1.83

2.69

 < 0.001

1.97

1.60

2.34

 < 0.001

  1. B Unstandardized Regression Coefficient, 95% CI 95% confidence interval of B, SGD Singapore dollars
  2. Bold print highlights statistically significant B
  3. aAfter accounting for listwise deletion of missing data, cases in linear regression model: 348
  4. bAfter accounting for listwise deletion of missing data, cases in linear regression model: 343
  5. cAfter accounting for listwise deletion of missing data, cases in linear regression model: 347
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BMC Psychiatry

ISSN: 1471-244X

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