Table 2 Trials of different counselling interventions at time of first contact.

Study/country		Population (follow‐up rate)		Intervention(s)		Control		Criteria for cessation
Thompson et al, 199318 United States		382 smokers/recent quitters (83%)		Immediate counselling based on stage, script tailored to blue collar workers using focus groups		Immediate counselling based on standard fact sheets. Self help materials		6 months (PP)
Orleans et al, 199817 United States		1422 African Americans calling Cancer Information Service (CIS) (63%)		Immediate counselling tailored to African Americans and tailored self help “Pathways to Freedom”		Immediate standard CIS telephone counselling and standard guide “Clearing the Air”		6 months (PP) (12 months for 445 participants)

PP, point prevalence.