Table 3

Results for longitudinal models assessing the influence of neighbourhood and family characteristics on BMI percentile among children aged 2–3 in the NLSCY*

Parameter
 Model C
 Model D


Estimate
 95% CI
 Estimate
 95% CI
Initial Status
 π0i



Intercept
 β00
 71.05
 67.1 to 74.99
 70.58
 65.82 to 75.34
Female
 β01
 -1.52
 -3.53 to 0.49
 1.82
 -0.9 to 4.55
Age 2 in 1994
 β02
 -2.34
 -4.35 to -0.33
 -2.87
 -5.6 to -0.13
Child living in an intact family, 1994
 β03
 -3.84
 -7.06 to -0.62
 -5.94
 -10.24 to -1.64
Income adequacy: low/low middle, 1994
 β04
 0.17
 -2.77 to 3.1
 0.64
 -3.42 to 4.71
Income adequacy: high, 1994
 β05
 0.31
 -2.85 to 3.48
 0.99
 -3.21 to 5.19
No high school certificate (PMK), 1994
 β06
 2.44
 -0.83 to 5.7
 1.82
 -2.75 to 6.39
Postsecondary degree (PMK), 1994
 β07
 -1.34
 -3.55 to 0.88
 -1.597
 -4.62 to 1.42
Neighbourhood: least poor
 β08
 1.46
 -1.02 to 3.95

Neighbourhood: most poor
 β09
 4.03
 1.2 to 6.86

Neighbourhood: urban
 β010
 -3.51
 -5.55 to -1.46

Rate of Change
 π1i



Time
 β10
 -1.35
 -1.82 to -0.88
 -1.66
 -3.31 to 0
Female
 β11

-1.75
 -2.69 to -0.82
Age 2 in 1994
 β12

0.31
 -0.63 to 1.25
Child living in an intact family, 1994
 β13

1.17
 -0.33 to 2.68
Income adequacy: low/low middle, 1994
 β14

-0.02
 -1.46 to 1.42
Income adequacy: high, 1994
 β15

-0.72
 -2.2 to 0.76
No high school certificate (PMK), 1994
 β16

0.58
 -1.01 to 2.16
Postsecondary degree (PMK), 1994
 β17

0.082
 -0.96 to 1.12
Neighbourhood: least poor
 β18



Neighbourhood: most poor
 β19



Neighbourhood: urban
 β110



Random Effects




     Level 2: Initial status
 Math
 120.12
 100.51 to 139.74
 120.6
 101.18 to 140.01
          Covariance
 σ01
 -2.12
 -7.28 to 3.04
 -1.36
 -6.41 to 3.69
          Rate of change
 Math
 0.95
 -1.13 to 3.03
 0.58
 -1.46 to 2.61
     Level 1: Within person
 Math
 963.66
 932.28 to 995.03
 963.94
 932.49 to 995.38
Goodness of Fit




-2 Log Likelihood
88051.77
88048.71
Parameter
 Model E
 Model F


Estimate
 95% CI
 Estimate
 95% CI
Initial Status
 π0i



Intercept
 β00
 66.71
 63.84 to 69.57
 72.43
 67.31 to 77.55
Female
 β01
 1.96
 -0.78 to 4.69
 1.89
 -0.83 to 4.61
Age 2 in 1994
 β02
 -2.84
 -5.58 to -0.11
 -2.91
 -5.63 to -0.19
Child living in an intact family, 1994
 β03

-6.42
 -10.74 to -2.09
Income adequacy: low/low middle, 1994
 β04

0.5
 -3.58 to 4.59
Income adequacy: high, 1994
 β05

1.68
 -2.6 to 5.97
No high school certificate (PMK), 1994
 β06

1.38
 -3.21 to 5.97
Postsecondary degree (PMK), 1994
 β07

-1.45
 -4.45 to 1.56
Neighbourhood: least poor
 β08
 0.32
 -3.08 to 3.72
 0.87
 -2.55 to 4.29
Neighbourhood:
most poor
β09
 2.15
 -1.64 to 5.93
 1.13
 -2.69 to 4.95
Neighbourhood: urban
 β010
 -3.45
 -6.2 to -0.69
 -3.57
 -6.38 to -0.76
Rate of Change
 π1i



Time
 β10
 -0.9
 -1.89 to 0.1
 -2.04
 -3.79 to -0.29
Female
 β11
 -1.72
 -2.65 to -0.78
 -1.73
 -2.66 to -0.8
Age 2 in 1994
 β12
 0.32
 -0.63 to 1.26
 0.3
 -0.65 to 1.24
Child living in an intact family, 1994
 β13

-1.31
 -2.8 to 0.19
Income adequacy: low/low middle, 1994
 β14

-0.19
 -1.64 to 1.27
Income adequacy: high, 1994
 β15

-0.69
 -2.21 to 0.83
No high school certificate (PMK), 1994
 β16

0.52
 -1.06 to 2.11
Postsecondary degree (PMK), 1994
 β17

0.05
 -0.99 to 1.09
Neighbourhood: least poor
 β18
 0.32
 -0.87 to 1.51
 0.31
 -0.89 to 1.51
Neighbourhood: most poor
 β19
 1.36
 0.07 to 2.65
 1.46
 0.16 to 2.75
Neighbourhood: urban
 β110
 -0.12
 -1.07 to 0.83
 0.02
 -0.96 to 0.99
Random Effects




     Level 2: Initial status
 Math
 123.83
 104.03 to 143.63
 119.51
 100.05 to 138.97
          Covariance
 σ01
 -2.04
 -7.23 to 3.15
 -1.41
 -6.49 to 3.67
          Rate of change
 Math
 0.65
 -1.41 to 2.71
 0.49
 -1.54 to 2.52
     Level 1: Within person
 Math
 962.57
 931.29 to 993.85
 962.85
 931.53 to 994.17
Goodness of Fit




-2 Log Likelihood
88054
88028.2

*NLSCY = National Longitudinal Survey of Children and Youth (Canadian); Estimates based on weighted data. Data used are for a cohort of children aged 2–3 at baseline (1994) and assessed bi-annually until 2002.

Oliver and Hayes BMC Public Health 2008 8:16   doi:10.1186/1471-2458-8-16