Table 1

Relative risk perceptions held by a majority of respondents, overall and for key subpopulations

Proportion of samples in which a majority of respondents held a particular perception of relative risk (%)
Product comparisonSamples*LessLess or equalEqualEqual or greaterGreaterDon't know†None‡Unknown§
SLT vs CCs (ref)Overall (n=77)183136002732
 General population (n=20)2002015003015
 Smokers (n=38)130115001655
 SLT users (n=13)38815000318
 SLT non-users (n=6)0170000830
ECs vs CCs (ref)Overall (n=46)7000004179
 General population (n=11)6400000279
 Smokers (n=16)8100000190
 Non-smokers (n=2)0000050050
 EC users (n=16)7500000196
 EC non-users (n=1)0000010000
NRT vs CCs (ref)Overall (n=20)¶35010500050
 General population (n=4)7500250000
 Smokers (n=12)25017000058
 NRT users (n=2)¶5000000050
 NRT non-users (n=2)¶0000000100
SLT vs NRT (ref)Overall (n=2)¶0000010000
ECs vs NRT (ref)Overall (n=1)¶0000001000
  • Bold results indicate the proportion of samples in which a majority of respondents held the epidemiologically correct perception of relative risk, for each product comparison.

  • *Sample sizes reflect those extracted from observational studies for which quantitative comparable findings were reported. Samples from the following studies were excluded due to their experimental nature: SLT versus CCs.39 ,43 Samples from the following studies were excluded due to use of an incompatible measure: SLT versus CCs;45 ECs versus CCs;69 ,73 ECs versus NRT.69

  • †Denotes samples in which a majority of respondents reported not knowing the relative risk of given products.

  • ‡Denotes samples in which a particular perception of relative risk was not held by a majority of respondents.

  • §Denotes samples for which insufficient information was given to discern whether a majority of respondents held a particular perception of relative risk.

  • ¶Denotes findings which should be interpreted with caution, given limitations with available data.