Table 2.
Measure | All | QuitGuide | Pivot | P valuea | Point estimateb (95% CI) | P value | |||||||||
|
Value, n (%) | Value, mean (SD) | Value, n (%) | Value, mean (SD) | Value, n (%) | Value, mean (SD) |
|
|
|
||||||
SASEQc | |||||||||||||||
|
Baseline | 188 (100) | 11.7 (4.8) | 94 (100) | 11.5 (4.9) | 94 (100) | 11.8 (4.7) | .69 | —d | — | |||||
|
12 weeks | 183 (97.3) | 14.3 (6.5) | 91 (97) | 14.1 (6.2) | 92 (98) | 14.5 (6.9) | — | 0.32 (−1.5 to 2.2) | .73 | |||||
|
Change | — | 2.7 (7.3) | — | 2.7 (7.9)e | — | 2.6 (6.7)f | — | 0.08 (−2.0 to 2.2) | .94 | |||||
STQg | |||||||||||||||
|
Baseline | 188 (100) | 4.5 (2.4) | 94 (100) | 4.3 (2.3) | 94 (100) | 4.6 (2.4) | .33 | — | — | |||||
|
12 weeks | 183 (97.3) | 6.2 (3.1) | 91 (97) | 5.8 (3.1) | 92 (98) | 6.6 (3.0) | — | 0.79 (−0.08 to 1.6) | .07 | |||||
|
Change | — | 1.8 (3.6) | — | 1.6 (3.6)e | — | 2.0 (3.6)e | — | 0.41 (−0.57 to 1.4) | .41 | |||||
DTQh | |||||||||||||||
|
Baseline | 188 (100) | 3.5 (2.5) | 94 (100) | 3.6 (2.6) | 94 (100) | 3.5 (2.3) | .72 | — | — | |||||
|
12 weeks | 183 (97.3) | 5.4 (3.1) | 91 (97) | 5.2 (3.0) | 92 (98) | 5.7 (3.1) | — | 0.47 (−0.40 to 1.3) | .29 | |||||
|
Change | — | 1.9 (3.5) | — | 1.7 (3.4)e | — | 2.2 (3.7)e | — | 0.59 (−0.29 to 1.5) | .18 |
a2-tailed t test.
bPoint estimate obtained from linear regression adjusted with randomization covariates: daily smoking frequency (≤14 vs ≥15 cigarettes per day), employment status (full-time or part-time employment vs not employed), race and ethnicity (minority race and ethnicity vs non-Hispanic White) and expected difficulty staying quit (scale 1-10; self-reported score of ≤5 vs ≥6).
cSASEQ: Smoking Abstinence and Self-efficacy Questionnaire (score 1-24).
dNot available.
ePaired t test difference from baseline to 12 weeks; P<.001.
fPaired t test difference from baseline to 12 weeks; P=.001.
gSTQ: success to quit—If you were smoking right now, how successful would you be? (1=not at all successful; 10=completely successful).
hDTQ: difficulty to stay quit—If you were to quit smoking right now, how difficult do you think it would be to stay smoke free? (1=really hard to stay quit; 10=really easy to stay quit).