| Characteristics | No NRT offer | NRT offer | ||||||
| Brief (n = 872) | Moderate (n = 718) | Intensive (n = 720) | Brief (n = 868) | Moderate (n = 715) | Intensive (n = 721) | p Value | ||
| Abstinence* 6 months (%) | 10.2 | 10.7 | 13.1 | 16.8 | 21.3 | 24.3 | <0.0001 | |
| Abstinence* 12 months (%) | 11.7 | 13.8 | 14.3 | 17.1 | 20.1 | 21.2 | <0.0001 | |
| Cost/participant (SD), 2004$ | $67 ($20) | $107 ($33) | $132 ($57) | $193 ($79) | $242 ($92) | $268 ($99) | <0.0001 | |
| Incremental cost/quit† (range), 2004$ | NA | $1912 ($2551–$1273) | $2640 ($4120–$1161) | $2467 ($3622–$1311) | $2109 ($2980–$1239) | $2112 ($2946–$1278) | NA | |
*Abstinent from all forms of tobacco for 30 days or more at follow-up.
†Incremental cost per additional quit relative to brief/no NRT arm. Ranges calculated using standard deviations and 12-month abstinence.