. 2022 Feb 11;22:276. doi: 10.1186/s12889-022-12674-3

Table 5.

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

	Intentions	Attitude	Subjective Norm	Self-efficacy	PBC	Knowledge of EC
Current users of EC
Intentions	1	0.550^a	0.180	0.418^a	0.128	0.036
Attitude		1	0.212	0.323^b	0.175	0.067
Subjective Norm			1	−0.039	−0.099	0.082
Self-efficacy				1	0.470^a	0.198
PBC					1	0.108
Knowledge of EC						1
Non EC users
Intention	1	0.577^a	0.514^a	0.487^a	0.191^a	0.079^a
Attitude		1	0.483^a	0.481^a	0.208^a	0.150^a
Subjective Norm			1	0.382^a	0.113^a	0.096^a
Self-efficacy				1	0.487^a	0.092^a
PBC					1	0.040
Knowledge of EC						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