Table 3:
VLNC vs CPD | Week | Condition × Week | Condition × Week (controlling for NRT patch use) | Condition × Week (controlling for % non-study cigarette/day) | |
---|---|---|---|---|---|
Dependence | |||||
NDSS Overall Score | 0 (.78) | 13.9 (<.001) | 3.2 (.018) | 3.0 (.023) | 1.0 (.41) |
NDSS Drive | 0.5 (.47) | 14.7(<.001) | 3.3 (.013) | 3.5 (.011) | 5.1 (.004) |
NDSS Stereotypy | 1.0 (.33) | 1.4 (.24) | 0.8 (.56) | 0.9 (.45) | 0.2 (.92) |
NDSS Priority | 0.6 (.43) | 0.6 (.68) | 0.6 (.68) | 0.3 (.88) | 0.7 (.63) |
NDSS Tolerance | 1.4 (.23) | 0.9 (.46) | 0.1 (.97) | 0.2 (.92) | 0.7 (.63) |
NDSS Continuity | 3.4 (.071) | 0.8 (.50) | 0.7 (.61) | 0.5 (.76) | 1.2 (.34) |
FTCD without cigarettes/day | 0.1 (.70) | 4.4 (.003) | 0.5 (.70) | 0.4 (.79) | 1.2 (.33) |
GN-SBQ | 0 (.94) | 12.8 (<.001) | 0.1 (.99) | 0.2 (.93) | 1.2 (.33) |
Addiction Ladder | 0 (.85) | 24.1 (<.001) | 2.4 (.049) | 1.8 (.14) | 0.5 (.75) |
Acceptability | |||||
% Non-Study Cigarettes/Day | 6.6 (.013) | 26.3 (<.001) | 8.0 (<.001) | 29.5 (<.001) | - |
Willingness to smoke number of cigarettes | 10.4 (.002) | 5.7 (<.001) | 4.0 (.005) | 6.0 (<.001) | - |
Ability to smoke number of cigarettes | 16.0 (<.001) | 4.8 (.002) | 3.5 (.009) | 4.1 (.005) | - |
Willingness to smoke type of cigarette | 0.01 (.94) | 0.2 (.92) | 0.7 (.60) | 0.5 (.75) | - |
Ability to smoke type of cigarette | 0.5 (.50) | 1.0 (.44) | 0.8 (.56) | 0.4 (.80) | - |
Nicotine Exposure | |||||
Cotinine | 8.3 (.005) | 5.3 (<.001) | 7.7 (<.001) | 9.3 (<.001) | 2.3 (.094) |
CPD=Condition that reduced cigarettes per day; FTCD=Fagerstrom Test for Cigarette Dependence; GN-SBQ=Glover-Nilsson Smoking Behavioral Questionnaire; NDSS=Nicotine Dependence Syndrome Scale; NRT=Nicotine replacement therapy; VLNC=Condition that switched to very low nicotine content cigarettes; Bold findings represents primary outcomes. See Table S4 for covariance structures and Table S9 for mean dependence, acceptability, and cotinine outcomes.