Adjusted smoking-cessation rates* by cumulated number of high-depth intervention components received. Per-protocol analysis (n=943; OR=1.91 over the entire range of the regressor [CI=1.18–3.11]; OR=1.24 per unit change in the regressor [CI=1.06–1.45])

*Seven-day point-prevalence abstinence. Cessation rates adjusted for baseline characteristics of Table 2 and nondepth experimental design factors (source and exposure). Missing data in these characteristics reduced the sample size from 954 to 944 for these analyses.