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Table 5 The relationships between TPB variables and knowledge of e-cigarettes in current users and non-users, aged 11–16 years

From: Employing the theory of planned behaviour to design an e-cigarette education resource for use in secondary schools

  Intentions Attitude Subjective Norm Self-efficacy PBC Knowledge of EC
Current users of EC
 Intentions 1 0.550a 0.180 0.418a 0.128 0.036
 Attitude   1 0.212 0.323b 0.175 0.067
 Subjective Norm    1 −0.039 −0.099 0.082
 Self-efficacy     1 0.470a 0.198
 PBC      1 0.108
 Knowledge of EC       1
Non EC users
 Intention 1 0.577a 0.514a 0.487a 0.191a 0.079a
 Attitude   1 0.483a 0.481a 0.208a 0.150a
 Subjective Norm    1 0.382a 0.113a 0.096a
 Self-efficacy     1 0.487a 0.092a
 PBC      1 0.040
 Knowledge of EC       1
  1. N 64, aCorrelation is significant at the 0.01 level (2-tailed). bCorrelation is significant at the 0.05 level (2-tailed). EC Electronic cigarettes, PBC Perceived behavioural control