Table 8.
Follow-up outcomes of the 66 studies as a function of modality
| Modality | # studies | Quit % (#s) | Quit 2% (#s) | % reduct (#s) | % reduct 2 (#s) |
| Classroom | 9 | 17 (9) | - | 15 (4) | - |
| School clinics | 28 | 12 (18) | 12 (26) | 34 (11) | 37 (19) |
| Medical/recovery clinics | 13 | 10 (9) | 10 (11) | 27 (8) | 14 (9) |
| Family | 1 | 31 | - | 9 | - |
| System-wide | 11 | 6 (9) | 7 (8) | 15 (2) | - |
| Computer | 3 | 13 (2) | 18 (3) | - | 41 (1) |
| Sensory deprivation | 1 | 0 | - | 24 | - |
Quit % (#s) = % quit at follow-up (# studies that provided data); Quit 2% (#s) = % quit at follow-up, and immediate posttest quit rates used if data is missing (# studies that provided data).