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Table 3 Means and standard deviations of the Strengths and Difficulties Questionnaire (SDQ) scales by smoking status

From: Emotional, behavioural problems and cigarette smoking in adolescence: findings of a Greek cross-sectional study

  Smoking status   
  No Yes   
  Mean SD Mean SD F (df: 1, 1026) P*
Emotional symptoms 2.90 2.10 3.70 2.40 12.85 <0.001
Conduct problems 2.90 1.50 3.70 1.60 31.06 <0.001
Hyperactivity-inattention 3.40 2.10 4.80 2.30 33.58 <0.001
Peer problems 1.80 1.70 2.10 1.60 4.38 0.037
Prosocial behaviour 8.10 1.80 7.80 2.00 2.20 0.138
  1. *multivariate analysis of variance (age and gender were used as covariates)