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. Author manuscript; available in PMC: 2015 Jul 13.
Published in final edited form as: Arch Intern Med. 2008 Oct 13;168(18):1950–1960. doi: 10.1001/archinte.168.18.1950

Figure 1.

Figure 1

Efficacy of smoking cessation counselling, by intensity of counselling intervention.

Outcome is number quit at longest follow-up (≥6 months) Intensity 1= contact in hospital of ≤ 15 minutes and no post-discharge support. Intensity 2= contact in hospital of >15 minutes and no post-discharge support; Intensity 3= any hospital contact plus post-discharge support lasting ≤1 month. Intensity 4=any hospital contact plus post-discharge support lasting >1 month. I2 measures statistical heterogeneity among studies.8