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Table 2 Model comparisons for variables predicting cognitive functioning

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

India

Model

R2

dfmod

dfres

F

p

ΔR2

R2

dfmod

dfres

F

p

ΔR2

R2

dfmod

dfres

F

p

ΔR2

 Step 1

.07

4

2481

46.14

***

.07

.03

4

2481

19.09

***

.03

.01

4

2481

9.26

***

.01

 Step 2

.08

1

2480

24.59

***

.01

.04

1

2480

17.85

***

.01

.02

1

2480

1.56

.211

.00

 Step 3

.09

4

2476

5.51

***

.01

.05

4

2476

7.87

***

.01

.02

3

2477

1.91

.126

.00

 Step 4

.09

6

2470

2.73

**

.01

.07

6

2470

7.93

***

.02

.02

6

2471

0.70

.647

.00

 Step 5

.12

2

2468

34.81

***

.02

.07

2

2468

6.53

***

.00

.03

2

2469

15.13

***

.01

Russia

South Africa

Model

R2

dfmod

dfres

F

p

ΔR2

R2

dfmod

dfres

F

p

ΔR2

Step 1

.10

4

2481

67.87

***

.10

.02

4

2481

14.72

***

.02

Step 2

.11

1

2480

24.14

***

.01

.05

1

2480

58.63

***

.02

Step 3

.11

4

2476

2.96

**

.00

.06

4

2476

7.05

***

.01

Step 4

.12

6

2470

2.34

**

.01

.06

6

2470

1.99

.064

.00

Step 5

.14

2

2468

31.15

***

.02

.09

2

2468

33.73

***

.02

  1. Note. Each Step was compared to the previous model in the hierarchical regression analysis. *** p < .01, ** p < .05