Table 6

Means, standard errors and univariate F statistics of each message condition on behavioural intentions

 Comparative risk messages Mean (SE) Negative comparative risk messages Mean (SE) Control Mean (SE) Univariate F statistics Full sample (current smokers and recent former smokers, n=1400)§ Intentions to smoke cigarettes* 3.34 (0.03)† 3.32 (0.03)† 3.50 (0.06)‡ F(2, 1385)=4.42, p=0.01, ηp 2 =0.01 Intentions to switch to e-cigarettes completely** 4.59 (0.09)† 4.41 (0.09)† 3.94 (0.16)‡ F(2, 1385)=6.25, p<0.01, ηp 2 =0.01 Current smokers only (n=1268) Intentions to quit 6.46 (0.11) 6.32 (0.11) 6.32 (0.19) F(2, 1253)=0.48, p=0.62, ηp 2 =0.00 Intentions to reduce the number of cigarettes 3.18 (0.03) 3.15 (0.03) 3.10 (0.06) F(2, 1253)=0.89, p=0.41, ηp 2 =0.00 Intentions to seek support 2.17 (0.04) 2.23 (0.04) 2.31 (0.07) F(2, 1253)=1.97, p=0.14, ηp 2 =0.00 Intentions to use nicotine replacement therapy 2.51 (0.04) 2.51 (0.04) 2.51 (0.07) F(2, 1253)=0.004, p=0.996, ηp 2 =0.00
• *p<0.05.

• **p<0.01.

• †  and ‡ - Different symbols indicate significant difference at p<0.05.

• §  Among current smokers only, message type on intentions to smoke cigarettes became marginally significant, F(2, 1253)=2.61, p=0.07, ηp 2 =0.004; message type on intentions to switch to e-cigarettes completely remained significant, F(2, 1253)=5.66, p=0.004, ηp 2 =0.01.

• e-cigarette, electronic cigarette.