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Table 3 Parameter estimates for linear growth curve models testing change over time at three waves

From: The CogBIAS longitudinal study of adolescence: cohort profile and stability and change in measures across three waves

Self-report mood measures Model test Fixed effects Random effects
  ICC -2LL ∆ p γ00 SE p γ10 SE p τ00 τ11 τ01
 Anxiety Intercept only .60 − 4444.00   13.73 0.30 <.001     6.02   
N = 504 Fixed slopes   − 4443.34 .252 13.56 0.34 <.001 0.19 0.17 .252 6.02   
  Random slopes   − 4427.29 <.001 13.56 0.34 <.001 0.21 0.19 .283 6.57 2.68 −.32
 Depression Intercept only .58 − 4099.91   9.14 0.23 <.001     4.53   
N = 504 Fixed slopes   − 4073.72 <.001 8.31 0.25 <.001 0.95 0.13 <.001 4.56   
  Random slopes   − 4050.70 <.001 8.31 0.24 <.001 0.94 0.15 <.001 4.48 1.99 −.07
 Rumination Intercept only .47 − 2633.23   6.08 0.08 <.001     1.41   
N = 502 Fixed slopes   − 2607.49 <.001 5.76 0.09 <.001 0.38 0.05 <.001 1.41   
  Random slopes   − 2593.13 <.001 5.75 0.09 <.001 0.39 0.06 <.001 1.73 0.74 −.56
 Resilience Intercept only .56 − 4236.59   23.95 0.29 <.001     5.65   
N = 500 Fixed slopes   − 4234.63 .047 24.25 0.33 <.001 −0.36 0.18 .048 5.65   
  Random slopes   − 4233.40 .293 24.26 0.33 <.001 −0.37 0.18 .050 5.77 1.41 −.17
 Self esteem Intercept only .57 − 882.04   1.78 0.02 <.001     0.41   
N = 504 Fixed slopes   − 874.21 <.001 1.83 0.02 <.001 −0.05 0.01 <.001 0.41   
  Random slopes   − 858.26 <.001 1.83 0.02 <.001 −0.05 0.01 <.001 0.41 0.17 −.08
 Wellbeing Intercept only .57 − 5100.03   41.98 0.56 <.001     11.02   
N = 498 Fixed slopes   − 5099.45 .283 41.64 0.64 <.001 0.36 0.34 .283 11.01   
  Random slopes   − 5078.22 <.001 41.58 0.58 <.001 0.45 0.36 .218 9.74 3.92 .26
 Worry Intercept only .64 − 1113.28   1.61 0.03 <.001     0.53   
N = 504 Fixed slopes   − 1109.24 .004 1.57 0.03 <.001 0.03 0.01 .005 0.53   
  Random slopes   − 1099.47 <.001 1.57 0.03 <.001 0.04 0.01 .007 0.57 0.19 −.29
Other self-report measures Model test Fixed effects Random effect
  ICC -2LL ∆ p γ00 SE p γ00 SE p τ00 τ11 τ01
 BAS Drive
N = 501
Intercept only .47 − 1205.31   1.20 0.02 <.001     0.46   
Fixed slopes   − 1200.16 .001 1.15 0.02 <.001 0.05 0.01 .001 0.46   
Random slopes   − 1197.56 .074 1.15 0.03 <.001 0.06 0.02 .002 0.51 0.17 −.37
 BAS Fun
N = 501
Intercept only .51 − 1123.33   1.70 0.02 <.001     0.46   
Fixed slopes   − 1122.51 .197 1.72 0.03 <.001 −0.02 0.02 .198 0.46   
Random slopes   − 1121.00 .223 1.72 0.03 <.001 −0.02 0.02 .213 0.47 0.14 −.19
 Cognitive restraint
N = 502
Intercept only .44 − 3695.66   13.46 0.16 g < .001     2.98   
Fixed slopes   −3695.63 .813 13.44 0.19 <.001 0.02 0.11 .813 2.98   
Random slopes   − 3679.59 <.001 13.44 0.18 <.001 0.01 0.13 .933 3.09 1.67 −.22
 Emotional eating
N = 502
Intercept only .45 − 3038.18   5.81 0.10 <.001     1.83   
Fixed slopes   − 3017.20 <.001 5.41 0.11 <.001 0.45 0.07 <.001 1.84   
Random slopes   − 3007.83 <.001 5.41 0.11 <.001 0.45 0.07 <.001 1.83 0.80 −.11
 Uncontrolled eating
N = 501
Intercept only .49 − 4004.05   20.47 0.22 <.001     4.10   
Fixed slopes   − 3991.11 <.001 19.83 0.25 <.001 0.74 0.14 <.001 4.12   
Random slopes   − 3987.04 .017 19.82 0.26 <.001 0.76 0.15 <.001 4.52 1.56 −.36
 Lack of Perseverance
N = 504
Intercept only .42 − 967.906   2.11 0.02 <.001     0.35   
Fixed slopes   − 961.947 <.001 2.15 0.02 <.001 −0.05 0.01 <.001 0.35   
Random slopes   − 959.146 .061 2.15 0.02 <.001 −0.05 0.01 <.001 0.40 0.15 −.48
 Lack of premeditation
N = 504
Intercept only .45 − 903.034   2.23 0.02 <.001     0.35   
Fixed slopes   − 889.513 <.001 2.29 0.02 <.001 −0.07 0.01 <.001 0.35   
Random slopes   − 888.698 .442 2.29 0.02 <.001 −0.07 0.02 <.001 0.37 0.09 −.36
 Negative urgency
N = 504
Intercept only .54 − 1057.69   2.52 0.02 <.001     0.45   
Fixed slopes   −1052.65 .001 2.48 0.03 <.001 0.05 0.01 .001 0.45   
Random slopes   −1046.61 .002 2.48 0.03 <.001 0.05 0.01 .003 0.46 0.16 −.17
 Sensation seeking
N = 504
Intercept only .73 − 1103.82   2.96 0.03 <.001     0.62   
Fixed slopes   − 1102.97 .190 2.98 0.03 <.001 −0.02 0.01 .191 0.62   
Random slopes   − 1096.78 .002 2.98 0.03 <.001 −0.02 0.01 .172 0.64 0.17 −.19
 Negative life events
N = 503
Intercept only .48 − 3604.32   5.34 0.15 <.001     2.74   
Fixed slopes   − 3602.05 .033 5.53 0.17 <.001 −0.21 0.10 .033 2.74   
Random slopes   − 3598.19 .021 5.53 0.18 <.001 −0.22 0.10 .030 3.09 0.64 −.65
 Risk involvement
N = 503
Intercept only .57 − 2803.55   4.19 0.09 <.001     1.80   
Fixed slopes   − 2722.83 <.001 2.94 0.13 <.001 0.67 0.05 <.001 1.88   
Random slopes   − 2707.75 <.001 2.93 0.13 <.001 0.68 0.05 <.001 1.96 0.66 −.34
 Victimisation
N = 503
Intercept only .56 − 4294.59   9.96 0.29 <.001     5.61   
Fixed slopes   − 4293.69 .182 10.16 0.32 <.001 −0.24 0.18 .182 5.61   
Random slopes   − 4289.18 .011 10.16 0.33 <.001 −0.24 0.19 .199 6.01 1.99 −.31
Behavioural measures Model test Fixed effects Random effects
   ICC -2LL ∆ p γ00 SE p γ10 SE p τ00 τ11 τ01
 Memory bias N = 504 Intercept only .44 − 732.596   −0.39 0.02 <.001     0.30   
Fixed slopes   − 689.730 <.001 −0.48 0.02 <.001 0.10 0.01 <.001 0.31   
Random slopes   − 686.670 .046 −0.48 0.02 <.001 0.10 0.01 <.001 0.33 0.11 −.31
 Non-social interpretation bias N = 504 Intercept only .48 − 1794.36   −0.41 0.04 <.001     0.70   
Fixed slopes   − 1788.87 <.001 −0.34 0.04 <.001 −0.08 0.02 <.001 0.70   
Random slopes   − 1786.81 .128 −0.34 0.04 <.001 −0.08 0.02 .001 0.75 0.23 −.30
 Social interpretation bias N = 504 Intercept only .54 − 2021.78   0.61 0.05 <.001     0.91   
Fixed slopes   −2018.65 .012 0.68 0.05 <.001 −0.07 0.03 .012 0.91   
Random slopes   −2005.68 <.001 0.68 0.05 <.001 −0.07 0.03 .023 0.97 0.41 −.30
  1. Note: Bold indicates best fitting model; only variables that showed high stability were modelled; ICC = Intraclass Correlation Coefficient from the intercept only model; −2LL = Log-likelihood value; ∆ p = p-value for change in model fit; SE = Standard Error; γ00 = Intercept; γ10 = Slope; τ00 = Intercept variance; τ11 = Slope variance; τ01 = Covariance between random effects