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Table 6 Household income and minutes walking for transport in the previous week: main effect and time-interaction models

From: Change in walking for transport: a longitudinal study of the influence of neighbourhood disadvantage and individual-level socioeconomic position in mid-aged adults

 

Model 1

Model 2

Model 3

Household income 1,2

Main effect

Interaction

Main effect

Interaction

Main effect

Interaction

Intercept (se)

67.3 (3.1)

63.5 (3.8)

61.1 (3.7)

57.4 (4.3)

63.4 (3.8)

60.3 (4.4)

$130,000 pa or more

--

--

--

--

--

--

$72,800 - $129,999

−1.2 (−7.3, 4.9)ns

1.6 (−7.0, 10.2)ns

−2.6 (−8.7, 3.6)ns

0.2 (−8.4, 8.8)ns

−2.1 (−8.3, 4.4)ns

0.5 (−8.2, 9.1)ns

$52,000 - $72,799

−3.6 (−10.8, 3.7)ns

1.6 (−8.3, 11.5)ns

−5.7 (−13.1, 1.6)ns

−0.5 (−10.4, 9.5)ns

−4.6 (−12.1, 2.8)ns

−0.1 (−10.0, 10.0)ns

$26,000 - $51,999

1.2 (−5.9, 8.4)ns

6.5 (−3.2, 16.2)ns

−1.4 (−8.6, 5.9)ns

3.7 (−6.1, 13.5)ns

−0.8 (−6.8, 8.3)ns

4.8 (−5.2, 14.8)ns

$0 - $25,999

9.0 (0.6, 17.4)*

17.8 (6.4, 29.2)†

5.2 (−3.4, 13.8)ns

13.8 (2.3, 25.4)†

7.6 (−1.4, 16.6)ns

15.1 (3.2, 26.9)†

$130,000 pa or more * time

 

--

 

--

 

--

$72,800 - $129,999 * time

 

−2.8 (−9.5, 3.9)ns

 

−2.8 (−9.4, 4.0)ns

 

−2.6 (−9.3, 4.0)ns

$52,000 - $72,799 * time

 

−5.8 (−13.6, 2.1)ns

 

−5.8 (−13.7, 2.0)ns

 

−5.2 (−13.1, 2.7)ns

$26,000 - $51,999 * time

 

−5.8 (−13.1, 1.5)ns

 

−5.6 (−12.8, 1.7)ns

 

−4.4 (−11.7, 2.9)ns

$0 - $25,999 * time

 

−9.8 (−18.3, −1.2)*

 

−9.5 (−18.1, −1.0)*

 

−8.3 (−16.8, 0.3)ns

Between-neighbourhood variance (se)

125.7 (38.9)

124.1 (38.7)

90.3 (34.8)

89.3 (34.7)

82.1 (33.7)

89.3 (34.7)

Between-individual variance (se)

2270.4 (138.3)

2274.9 (138.3)

2274.8 (138.3)

2278.8 (138.3)

2248.5 (137.6)

2278.8 (138.3)

Within individual variance (se)

8976.6 (151.0)

8968.4 (150.8)

8976.0 (150.9)

8968.1 (150.8)

8960.7 (150.7)

8968.1 (150.8)

−2Log Likelihood

140162.1

140155.8ns

140146.3

140140.2ns

140105.0

140100.2ns

  1. 1Household income adjusted for age, sex, and year (Model 1), plus neighbourhood disadvantage (Model 2), plus occupation and education (Model 3).
  2. 2The missing category for household income was included in the statistical analysis but not presented in the table.
  3. †<0.01, *< 0.05, ns= not statistically significant.