Table 2

Respondents’ awareness of tobacco harm reduction

Question	Respondent category (number of respondents)*
Question	All (1473)	Researcher/scientists (199)	Activists/advocates (338)	p Value	National/international (117)	State/local (963)	p Value
*Sample sizes include all individuals who selected an answer that placed them in the relevant respondent category. Due to attrition and exclusion of “unsure” and “rather not answer” responses, the number of cases included in each calculation may be smaller.
†Respondents answering “unsure” were categorised with those answering “no” for this one question. For all other questions, all “unsure” and “rather not answer” responses were excluded from the calculations.
‡Asked of those who responded “yes” to the first question.
Familiar with “tobacco harm reduction” before survey? (% answering yes)†	69.7	86.9	66.6	<0.001	81.2	66.2	0.001
When first heard about THR?§
⩽past year	28.5	16.6	32.1	<0.001	22.5	33.6	0.026
>1, ⩽2 years ago	30.7	25.2	32.1		28.1	32.6
>2, ⩽5 years ago	31.9	43.6	26.3		38.2	27.6
>5 years ago	8.9	14.7	9.6		11.2	6.2
Sources of THR information‡
Scientific conferences	64.1	80.5	54.4	<0.001	74.7	58.8	0.004
Scientific or professional journals	60.7	74.6	53.5	<0.001	73.6	56.1	0.002
Conversations with medical professionals or colleagues	24.5	27.2	26.3	0.834	25.3	22.6	0.580
Conversations with non-medical colleagues	49.6	52.1	57.6	0.278	56.3	46.6	0.089
Newspapers, magazines, television, or radio	30.7	20.7	37.3	<0.001	31.0	31.5	0.941
Tobacco industry reports and documents	24.7	24.8	31.8	0.135	32.2	23.3	0.071
How much attention does THR receive within the field of tobacco control now? (% answering a fair amount to a great deal/% little or none)	42.9/57.1	54.6/45.4	36.4/63.6	<0.001	58.2/41.8	37.0/63.0	<0.001
How much attention will THR receive 10 years from now? (% answering a fair amount to a great deal/% little or none)	82.7/17.3	88.3/11.7	82.4/17.6	0.084	87.2/12.8	80.7/19.3	0.106