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Table 5 Time trends of aggregated health risk behaviors of subjects from grade 4 to grade 6

From: Changes in health risk behaviors of elementary school students in northern Taiwan from 2001 to 2003: results from the child and adolescent behaviors in long-term evolution study

  Unhealthy habits Aggressive behavior Substance using behavior
  Model 1 Model 2 Model 1 Model 2 Model 1 Model 2
Fixed effects Coef. SD. Coef. SD. Coef. SD. Coef. SD. Coef. SD. Coef. SD.
   Intercept 10.680* 0.113 10.676* 0.113 5.321* 0.069 5.321* 0.069 3.097* 0.017 3.097* 0.017
   Time 0.119* 0.036 0.119* 0.036 0.104* 0.022 0.104* 0.022 -0.027* 0.006 -0.027* 0.006
   Boy vs. Girl    0.758* 0.102    0.419* 0.062    0.072* 0.014
   Hsinchu vs. Taipei    0.287* 0.102    0.194* 0.062    0.037* 0.014
Random effects Var. SD. Var. SD. Var. SD. Var. SD. Var. SD. Var. SD.
   Individual variability 3.156* 0.161 3.156* 0.161 1.135* 0.059 1.135* 0.059 0.039* 0.003 0.039* 0.003
   Time variability 4.709* 0.110 4.709* 0.110 1.789* 0.042 1.789* 0.042 0.146* 0.003 0.146* 0.003
  1. * p: < 0.05