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Table 3 Summary of hierarchical regression analysis for variables predicting cognitive functioning in the five selected countries

From: Examining the impact of socioeconomic status, demographic characteristics, lifestyle and other risk factors on adults' cognitive functioning in developing countries: an analysis of five selected WHO SAGE Wave 1 Countries

 

China

Ghana

Variable

B

SE

95% CI

β

t

p

B

SE

95% CI

β

t

p

Step 1

(Intercept)

2.88

0.09

[2.71, 3.06]

0.00

32.20

***

2.10

0.08

[1.95, 2.25]

0.00

27.30

***

Sex

-0.20

0.06

[-0.31, -0.09]

-0.07

-3.53

***

-0.06

0.03

[-0.12, -0.00]

-0.05

-2.11

**

Age

-0.10

0.01

[-0.12, -0.08]

-0.20

-10.07

***

-0.05

0.010

[-0.07, -0.03]

-0.11

-5.18

***

Residence

-0.19

0.02

[-0.24, -0.14]

-0.16

-8.06

***

0.07

0.03

[0.02, 0.12]

0.05

2.70

**

Marital Status

-0.02

0.02

[-0.05, 0.01]

-0.02

-1.05

.292

-0.02

0.01

[-0.05, -0.00]

-0.06

-2.25

**

Step 2

(Intercept)

2.99

0.09

[2.81, 3.17]

0.00

32.60

***

2.21

0.08

[2.05, 2.36]

0.00

27.35

***

Sex

-0.19

0.06

[-0.30, -0.08]

-0.07

-3.33

***

-0.05

0.03

[-0.11, 0.01]

-0.04

-1.67

.096

Age

-0.09

0.01

[-0.11, -0.07]

-0.17

-8.23

***

-0.04

0.01

[-0.06, -0.02]

-0.09

-4.14

***

Residence

-0.17

0.02

[-0.22, -0.13]

-0.14

-7.31

***

0.07

0.03

[0.02, 0.12]

0.06

2.85

**

Marital Status

-0.02

0.01

[-0.05, 0.01]

-0.02

-1.16

.248

-0.02

0.01

[-0.04, -0.00]

-0.05

-2.10

**

Self-Reported Memory Difficulty

-0.07

0.01

[-0.10, -0.04]

-0.10

-4.96

***

-0.07

0.02

[-0.11, -0.04]

-0.09

-4.23

***

Step 3

(Intercept)

2.46

0.37

[1.73, 3.18]

0.00

6.66

***

2.12

0.17

[1.78, 2.45]

0.00

12.38

***

Sex

-0.19

0.06

[-0.30, -0.08]

-0.07

-3.37

***

-0.07

0.03

[-0.13, -0.01]

-0.06

-2.27

**

Age

-0.09

0.01

[-0.11, -0.07]

-0.17

-8.17

***

-0.04

0.01

[-0.06, -0.02]

-0.09

-4.07

***

Residence

-0.19

0.02

[-0.24, -0.14]

-0.16

-7.96

***

0.08

0.03

[0.03, 0.13]

0.06

3.23

***

Marital Status

-0.02

0.01

[-0.05, 0.01]

-0.02

-1.20

.229

-0.02

0.01

[-0.04, -0.00]

-0.05

-2.04

**

Self-Reported Memory Difficulty

-0.08

0.01

[-0.11, -0.05]

-0.11

-5.44

***

-0.07

0.02

[-0.10, -0.03]

-0.08

-3.95

***

Tobacco Use

0.33

0.33

[-0.33, 0.98]

0.02

0.98

.325

-0.01

0.03

[-0.07, 0.05]

-0.00

-0.20

.844

Alcohol Use

0.15

0.22

[-0.28, 0.57]

0.01

0.67

.503

0.09

0.02

[0.04, 0.13]

0.07

3.48

***

Vegetables Per Day

0.06

0.01

[0.03, 0.09]

0.09

4.47

***

-0.26

0.13

[-0.52, 0.01]

-0.04

-1.90

.058

Fruits Per Day

0.00

0.05

[-0.09, 0.09]

0.00

0.01

.988

0.22

0.06

[0.11, 0.33]

0.08

3.94

***

Step 4

(Intercept)

1.93

0.77

[0.42, 3.44]

0.00

2.51

**

2.08

0.41

[1.28, 2.88]

0.00

5.11

***

Sex

-0.19

0.06

[-0.30, -0.08]

-0.07

-3.40

***

-0.07

0.03

[-0.13, -0.01]

-0.06

-2.26

**

Age

-0.08

0.01

[-0.11, -0.06]

-0.16

-7.76

***

-0.03

0.010

[-0.05, -0.01]

-0.07

-3.46

***

Residence

-0.19

0.02

[-0.24, -0.14]

-0.16

-7.78

***

0.07

0.03

[0.02, 0.12]

0.06

2.88

**

Marital Status

-0.02

0.01

[-0.05, 0.01]

-0.02

-1.18

.239

-0.02

0.01

[-0.04, -0.00]

-0.05

-2.00

**

 Self-Reported Memory Difficulty

-0.07

0.01

[-0.10, -0.05]

-0.10

-5.02

***

-0.06

0.02

[-0.10, -0.03]

-0.07

-3.47

***

Tobacco Use

0.35

0.33

[-0.30, 1.01]

0.02

1.06

.291

-0.01

0.03

[-0.07, 0.05]

-0.01

-0.30

.762

Alcohol Use

0.14

0.22

[-0.29, 0.56]

0.01

0.63

.531

0.08

0.02

[0.03, 0.13]

0.06

3.13

**

Vegetables Per Day

0.06

0.01

[0.03, 0.09]

0.09

4.45

***

-0.25

0.13

[-0.51, 0.01]

-0.04

-1.86

.062

Fruits Per Day

-0.01

0.05

[-0.10, 0.09]

-0.01

-0.03

.977

0.20

0.05

[0.09, 0.31]

0.07

3.63

***

Chronic Lung Disease

0.01

0.04

[-0.06, 0.08]

0.01

0.27

.790

0.01

0.14

[-0.27, 0.30]

0.00

0.09

.931

Anxiety

0.07

0.02

[0.03, 0.12]

0.06

3.13

**

-0.10

0.02

[-0.13, -0.06]

-0.12

-5.91

***

Hypertension

0.00

0.03

[-0.05, 0.06]

0.00

0.13

.899

-0.05

0.04

[-0.12, 0.03]

-0.02

-1.14

.254

Diabetes

0.00

0.06

[-0.11, 0.12]

0.00

0.04

.967

0.04

0.07

[-0.10, 0.19]

0.01

0.56

.578

Depression

0.01

0.32

[-0.63, 0.64]

0.00

0.02

.987

-0.12

0.09

[-0.30, 0.06]

-0.03

-1.31

.191

Stroke

0.15

0.07

[0.02, 0.28]

0.05

2.30

**

0.22

0.07

[0.08, 0.36]

0.06

3.02

**

Step 5

(Intercept)

1.47

0.76

[-0.03, 2.96]

0.00

1.92

.055

1.84

0.41

[1.04, 2.65]

0.00

4.48

***

Sex

-0.14

0.06

[-0.25, -0.03]

-0.05

-2.47

***

-0.05

0.03

[-0.11, 0.01]

-0.04

-1.61

.107

Age

-0.06

0.01

[-0.08, -0.03]

-0.11

-4.94

***

-0.03

0.01

[-0.05, -0.01]

-0.06

-2.74

**

Residence

-0.10

0.03

[-0.16, -0.05]

-0.08

-3.78

***

0.10

0.03

[0.05, 0.15]

0.08

3.70

**

Marital Status

-0.01

0.01

[-0.04, 0.02]

-0.01

-0.61

.544

-0.02

0.01

[-0.04, 0.00]

-0.04

-1.75

.080

Self-Reported Memory Difficulty

-0.06

0.01

[-0.09, -0.03]

-0.08

-4.10

***

-0.06

0.02

[-0.09, -0.03]

-0.07

-3.42

***

Tobacco Use

0.36

0.33

[-0.29, 1.00]

0.02

1.08

.278

-0.02

0.03

[-0.08, 0.04]

-0.02

-0.76

.447

Alcohol Use

0.09

0.21

[-0.33, 0.51]

0.01

0.43

.667

0.08

0.02

[0.03, 0.12]

0.06

3.08

**

Vegetables Per Day

0.06

0.01

[0.03, 0.09]

0.09

4.55

***

-0.26

0.13

[-0.52, 0.00]

-0.04

-1.95

**

Fruits Per Day

-0.03

0.05

[-0.13, 0.06]

-0.01

-0.71

.476

0.21

0.05

[0.10, 0.31]

0.07

3.78

***

Chronic Lung Disease

0.00

0.04

[-0.07, 0.07]

0.001

0.05

.958

0.00

0.14

[-0.28, 0.28]

0.00007

0.00

.997

Anxiety

0.05

0.02

[0.01, 0.09]

0.04

2.24

**

-0.10

0.02

[-0.13, -0.06]

-0.12

-5.89

***

Hypertension

0.02

0.03

[-0.04, 0.08]

0.01

0.65

.514

-0.03

0.04

[-0.11, 0.05]

-0.01

-0.70

.485

Diabetes

0.02

0.06

[-0.09, 0.14]

0.007

0.38

.706

0.06

0.07

[-0.09, 0.20]

0.02

0.81

.420

Depression

-0.05

0.32

[-0.68, 0.58]

-0.003

-0.15

.879

-0.11

0.09

[-0.29, 0.06]

-0.02

-1.27

.204

Stroke

0.14

0.06

[0.01, 0.26]

0.04

2.15

**

0.23

0.07

[0.09, 0.37]

0.06

3.14

**

Education

0.05

0.01

[0.03, 0.07]

0.12

5.06

***

0.02

0.01

[0.00, 0.04]

0.04

1.98

**

Income Quintile

0.05

0.01

[0.03, 0.07]

0.12

5.61

***

0.02

0.01

[0.01, 0.04]

0.05

2.49

**

 

India

Russia

Variable

B

SE

95% CI

β

t

p

B

SE

95% CI

β

t

p

Step 1

(Intercept)

8.88

0.19

[8.51, 9.25]

0.00

46.73

***

2.81

0.09

[2.65, 2.98]

0.00

32.97

***

Sex

-0.21

0.06

[-0.33, -0.08]

-0.07

-3.27

***

-0.00

0.03

[-0.06, 0.06]

-0.00

-0.03

.980

Age

-0.02

0.02

[-0.07, 0.02]

-0.02

-1.13

.258

-0.16

0.01

[-0.18, -0.13]

-0.28

-13.62

***

Residence

0.20

0.07

[0.06, 0.35]

0.05

2.76

**

-0.17

0.03

[-0.23, -0.11]

-0.11

-5.61

***

Marital Status

-0.07

0.03

[-0.12, -0.02]

-0.06

-2.63

**

-0.02

0.01

[-0.05, -0.00]

-0.05

-2.22

**

Step 2

(Intercept)

8.81

0.20

[8.42, 9.20]

0.00

44.18

***

2.94

0.09

[2.77, 3.12]

0.00

33.08

***

Sex

-0.22

0.06

[-0.35, -0.10]

-0.08

-3.45

***

0.01

0.03

[-0.05, 0.07]

0.01

0.24

.812

Age

-0.03

0.02

[-0.08, 0.01]

-0.03

-1.39

.164

-0.13

0.01

[-0.16, -0.11]

-0.24

-10.93

***

Residence

0.19

0.07

[0.05, 0.34]

0.05

2.65

**

-0.15

0.03

[-0.21, -0.09]

-0.10

-5.10

***

Marital Status

-0.07

0.03

[-0.12, -0.02]

-0.06

-2.63

**

-0.02

0.01

[-0.05, -0.00]

-0.05

-2.13

**

Self-Reported Memory Difficulty

0.05

0.04

[-0.03, 0.13]

0.03

1.25

.211

-0.11

0.02

[-0.15, -0.06]

-0.10

-4.91

***

Step 3

(Intercept)

8.46

0.46

[7.57, 9.36]

0.00

18.50

***

2.93

0.15

[2.64, 3.22]

0.00

19.79

***

Sex

-0.27

0.07

[-0.40, -0.14]

-0.09

-3.95

***

0.06

0.04

[-0.02, 0.13]

0.04

1.52

.130

Age

-0.03

0.02

[-0.08, 0.010]

-0.03

-1.54

.124

-0.13

0.01

[-0.15, -0.10]

-0.23

-10.41

***

 Residence

0.20

0.07

[0.05, 0.34]

0.05

2.69

**

-0.15

0.03

[-0.21, -0.09]

-0.10

-4.96

***

Marital Status

-0.07

0.03

[-0.12, -0.02]

-0.06

-2.57

**

-0.02

0.01

[-0.05, -0.00]

-0.05

-2.10

**

 Self-Reported Memory Difficulty

0.05

0.04

[-0.03, 0.13]

0.03

1.20

.229

-0.11

0.02

[-0.15, -0.07]

-0.10

-4.99

***

Tobacco Use

      

-0.06

0.04

[-0.13, 0.02]

-0.04

-1.53

.126

 Alcohol Use

0.15

0.07

[0.01, 0.29]

0.05

2.16

**

-0.08

0.03

[-0.15, -0.02]

-0.05

-2.55

**

Vegetables Per Day

0.28

0.27

[-0.26, 0.82]

0.02

1.02

.307

0.02

0.11

[-0.20, 0.24]

0.00

0.20

.841

Fruits Per Day

-0.12

0.39

[-0.88, 0.63]

-0.01

-0.32

.752

0.08

0.12

[-0.16, 0.32]

0.01

0.66

.507

Step 4

(Intercept)

8.34

0.74

[6.89, 9.80]

0.00

11.26

***

2.23

0.27

[1.70, 2.76]

0.00

8.30

***

Sex

-0.29

0.07

[-0.42, -0.15]

-0.10

-4.13

***

0.07

0.04

[-0.00, 0.14]

0.05

1.90

.058

Age

-0.04

0.02

[-0.08, 0.01]

-0.04

-1.65

.099

-0.12

0.01

[-0.15, -0.10]

-0.22

-9.58

***

Residence

0.20

0.07

[0.06, 0.35]

0.06

2.75

**

-0.15

0.03

[-0.21, -0.09]

-0.10

-5.04

***

 Marital Status

-0.07

0.03

[-0.12, -0.01]

-0.06

-2.52

**

-0.02

0.01

[-0.05, -0.00]

-0.05

-2.18

.029

Self-Reported Memory Difficulty

0.04

0.04

[-0.04, 0.13]

0.02

1.09

.276

-0.09

0.02

[-0.14, -0.05]

-0.09

-4.31

***

Tobacco Use

      

-0.06

0.04

[-0.14, 0.01]

-0.04

-1.64

.102

 Alcohol Use

0.15

0.07

[0.01, 0.29]

0.05

2.17

**

-0.09

0.03

[-0.15, -0.02]

-0.05

-2.63

**

Vegetables Per Day

0.26

0.27

[-0.28, 0.80]

0.02

0.96

.338

0.01

0.11

[-0.20, 0.23]

0.00

0.13

.894

Fruits Per Day

-0.14

0.39

[-0.89, 0.62]

-0.007

-0.35

.723

0.08

0.12

[-0.16, 0.32]

0.01

0.66

.512

Chronic Lung Disease

0.09

0.14

[-0.18, 0.36]

0.01

0.66

.509

0.00

0.04

[-0.07, 0.07]

0.00

0.08

.936

Anxiety

0.02

0.04

[-0.06, 0.10]

0.009

0.43

.668

0.01

0.02

[-0.04, 0.06]

0.010

0.51

.611

Hypertension

-0.14

0.09

[-0.31, 0.03]

-0.03

-1.59

.111

0.05

0.03

[-0.01, 0.10]

0.03

1.55

.121

Diabetes

0.15

0.14

[-0.11, 0.42]

0.02

1.13

.260

-0.01

0.05

[-0.11, 0.09]

-0.00

-0.23

.819

Depression

-0.08

0.12

[-0.31, 0.16]

-0.01

-0.64

.520

0.15

0.07

[0.01, 0.29]

0.04

2.14

**

Stroke

0.04

0.20

[-0.36, 0.44]

0.004

0.20

.842

0.14

0.06

[0.01, 0.26]

0.04

2.15

**

Step 5

(Intercept)

7.57

0.75

[6.10, 9.05]

0.00

10.08

***

1.40

0.29

[0.84, 1.96]

0.00

4.90

***

Sex

-0.21

0.07

[-0.36, -0.07]

-0.07

-2.89

**

0.09

0.04

[0.02, 0.17]

0.06

2.56

**

Age

-0.04

0.02

[-0.09, 0.01]

-0.04

-1.77

.077

-0.09

0.01

[-0.12, -0.07]

-0.17

-7.25

***

Residence

0.32

0.08

[0.16, 0.47]

0.09

4.11

***

-0.12

0.03

[-0.18, -0.06]

-0.08

-3.90

***

Marital Status

-0.06

0.03

[-0.11, -0.00]

-0.05

-2.10

**

-0.01

0.01

[-0.03, 0.01]

-0.02

-0.92

.360

Self Reported Memory Difficulty

0.07

0.04

[-0.01, 0.15]

0.04

1.77

.077

-0.07

0.02

[-0.11, -0.02]

-0.06

-3.04

***

Tobacco Use

      

-0.08

0.04

[-0.15, -0.01]

-0.05

-2.19

**

 Alcohol Use

0.13

0.07

[-0.01, 0.26]

0.04

1.84

.066

-0.06

0.03

[-0.13, -0.00]

-0.04

-2.02

**

Vegetables Per Day

0.27

0.27

[-0.26, 0.81]

0.02

1.00

.317

0.01

0.11

[-0.21, 0.22]

0.00

0.07

.947

 Fruits Per Day

-0.19

0.38

[-0.94, 0.57]

-0.01

-0.49

.625

0.09

0.12

[-0.15, 0.32]

0.02

0.71

.480

Chronic Lung Disease

0.07

0.14

[-0.19, 0.34]

0.01

0.53

.593

-0.01

0.04

[-0.08, 0.06]

-0.01

-0.30

.767

 Anxiety

-0.00

0.04

[-0.08, 0.08]

-0.00

-0.07

.947

0.01

0.02

[-0.04, 0.05]

0.01

0.25

.801

Hypertension

-0.09

0.09

[-0.26, 0.09]

-0.02

-0.99

.324

0.05

0.03

[-0.01, 0.10]

0.03

1.62

.106

Diabetes

0.21

0.14

[-0.06, 0.48]

0.03

1.56

.120

-0.00

0.05

[-0.10, 0.09]

-0.00

-0.09

.929

Depression

-0.07

0.12

[-0.31, 0.16]

-0.01

-0.63

.531

0.16

0.07

[0.02, 0.30]

0.04

2.30

**

Stroke

0.05

0.20

[-0.34, 0.44]

0.005

0.24

.808

0.14

0.06

[0.01, 0.26]

0.04

2.20

**

Education

0.06

0.02

[0.02, 0.11]

0.06

2.63

**

0.11

0.02

[0.08, 0.14]

0.15

6.92

***

Income Quintile

0.09

0.02

[0.04, 0.13]

0.08

3.65

***

0.03

0.01

[0.01, 0.05]

0.06

2.83

**

 

South Africa

Variables

B

SE

95% CI

β

t

p

Step 1

(Intercept)

1.84

0.06

[1.72, 1.96]

0.00

29.29

***

Sex

-0.07

0.02

[-0.11, -0.02]

-0.06

-2.96

**

Age

-0.05

0.01

[-0.07, -0.04]

-0.12

-5.85

***

Residence

0.03

0.02

[-0.02, 0.07]

0.02

1.16

.247

Marital Status

-0.010

0.01

[-0.03, 0.01]

-0.03

-1.23

.217

Step 2

(Intercept)

2.00

0.07

[1.87, 2.13]

0.00

30.51

***

Sex

-0.05

0.02

[-0.10, -0.01]

-0.05

-2.48

**

Age

-0.04

0.01

[-0.06, -0.02]

-0.09

-4.18

***

Residence

0.04

0.02

[-0.00, 0.09]

0.04

1.79

.073

Marital Status

-0.01

0.01

[-0.02, 0.01]

-0.02

-1.13

.260

Self-Reported Memory Difficulty

-0.11

0.01

[-0.14, -0.08]

-0.16

-7.66

***

Step 3

(Intercept)

1.54

0.14

[1.26, 1.82]

0.00

10.85

***

Sex

-0.05

0.02

[-0.10, -0.01]

-0.05

-2.39

**

Age

-0.04

0.01

[-0.06, -0.02]

-0.09

-4.13

***

Residence

0.04

0.02

[-0.01, 0.08]

0.03

1.75

.081

Marital Status

-0.01

0.01

[-0.03, 0.01]

-0.03

-1.27

.205

Self-Reported Memory Difficulty

-0.11

0.01

[-0.14, -0.09]

-0.16

-7.98

***

Tobacco Use

-0.02

0.02

[-0.07, 0.03]

-0.02

-0.68

.498

Alcohol Use

0.02

0.03

[-0.04, 0.07]

0.01

0.65

.519

Vegetables Per Day

0.30

0.06

[0.18, 0.42]

0.09

4.75

***

Fruits Per Day

0.16

0.11

[-0.06, 0.38]

0.03

1.39

.166

Step 4

(Intercept)

2.13

0.25

[1.63, 2.63]

0.00

8.40

***

Sex

-0.06

0.02

[-0.10, -0.01]

-0.05

-2.49

**

Age

-0.04

0.01

[-0.06, -0.02]

-0.09

-4.20

***

Residence

0.05

0.02

[0.01, 0.09]

0.04

2.17

**

Marital Status

-0.01

0.008

[-0.03, 0.00]

-0.03

-1.41

.158

Self-Reported Memory Difficulty

-0.12

0.01

[-0.15, -0.09]

-0.17

-8.17

***

 Tobacco Use

-0.02

0.02

[-0.07, 0.03]

-0.02

-0.75

.451

Alcohol Use

0.02

0.03

[-0.04, 0.07]

0.01

0.61

.543

Vegetables Per Day

0.29

0.06

[0.17, 0.41]

0.09

4.58

***

Fruits Per Day

0.15

0.11

[-0.07, 0.37]

0.03

1.34

.181

Chronic Lung Disease

-0.07

0.08

[-0.22, 0.09]

-0.02

-0.84

.402

Anxiety

0.008

0.02

[-0.03, 0.04]

0.009

0.46

.644

Hypertension

-0.01

0.02

[-0.06, 0.03]

-0.01

-0.57

.566

Diabetes

-0.06

0.04

[-0.13, 0.01]

-0.03

-1.62

.106

Depression

-0.11

0.05

[-0.21, -0.02]

-0.05

-2.27

**

Stroke

-0.04

0.06

[-0.15, 0.07]

-0.01

-0.75

.456

Step 5

(Intercept)

1.67

0.26

[1.17, 2.18]

0.00

6.51

***

Sex

-0.04

0.02

[-0.09, 0.00]

-0.04

-1.89

.059

Age

-0.04

0.01

[-0.06, -0.02]

-0.09

-4.04

***

Residence

0.11

0.02

[0.07, 0.16]

0.10

4.70

***

Marital Status

-0.01

0.01

[-0.02, 0.01]

-0.03

-1.19

.234

Self-Reported Memory Difficulty

-0.09

0.01

[-0.12, -0.06]

-0.12

-5.92

***

Tobacco Use

-0.03

0.02

[-0.08, 0.01]

-0.03

-1.38

.169

Alcohol Use

0.01

0.03

[-0.05, 0.06]

0.005

0.21

.837

Vegetables Per Day

0.27

0.06

[0.15, 0.40]

0.09

4.35

***

Fruits Per Day

0.18

0.11

[-0.04, 0.40]

0.03

1.59

.111

Chronic Lung Disease

-0.07

0.08

[-0.22, 0.08]

-0.02

-0.89

.373

Anxiety

0.01

0.02

[-0.02, 0.04]

0.01

0.52

.604

Hypertension

-0.01

0.02

[-0.05, 0.04]

-0.005

-0.22

.824

Diabetes

-0.04

0.04

[-0.11, 0.03]

-0.02

-1.05

.293

Depression

-0.09

0.05

[-0.19, 0.01]

-0.04

-1.85

.064

Stroke

-0.04

0.06

[-0.15, 0.07]

-0.01

-0.74

.458

Education

0.02

0.01

[0.00, 0.04]

0.05

2.28

**

Income Quintile

0.06

0.01

[0.04, 0.07]

0.15

6.44

***

  1. *** p < .01, ** p < .05