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. 2007 Mar;5(2):135–142. doi: 10.1370/afm.650

Table 3.

Estimated Quits by Level of Enrollment in Quit Line

Enrollment Status Usual Quit Rate (%) Intervention (n = 484) Control (n = 220)
Level 1, enrolled in Quit Line 25 73 × 0.25 = 18.25 72 × 0.25 = 18.00
Level 2, brochure and callbacks 15 126 × 0.15 = 18.90 62 × 0.15 = 9.30
No enrollment, clinician advice only 10 285 × 0.10 = 28.50 86 × 0.10 = 8.60
Total estimated quits 65.65 35.90

* Actual referrals x estimated quit rate = number of quits.

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