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Table 4 Means and standard deviations of aggregated health risk behaviors over 3 years

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

  Aggressive behaviors Substance use behaviors Unhealthy habits
  Grade 4 Grade 5 Grade 6 Grade 4 Grade 5 Grade 6 Grade 4 Grade 5 Grade 6
Mean 5.85 5.61 6.06 3.13 3.08 3.08 11.50 11.08 11.74
Standard deviation 1.70 1.66 1.79 0.54 0.38 0.36 2.77 2.83 2.87