Distribution of participant characteristics in the initial sample, the followed-up sample and the not followed-up sample
| Initial sample (N=231) | Followed-up (n=208) | Not followed-up (n=23) | |||
|---|---|---|---|---|---|
| Participant characteristic | M (SD) | M (SD) | M (SD) | t | p Value |
| Age | 31.4 (10.1) | 31.3 (10.0) | 32.5 (11.3) | 0.57 | 0.571 |
| Daily cigarette consumption | 12.9 (7.8) | 13.1 (7.9) | 11.0 (6.6) | −1.28 | 0.203 |
| % | % | % | χ2 | p | |
| Sex | 4.02 | 0.045 | |||
| Male | 45.5 | 43.3 | 65.2 | ||
| Female | 54.6 | 56.7 | 34.8 | ||
| Highest level of education | 2.53 | 0.282 | |||
| Not finished secondary | 21.7 | 22.6 | 13.0 | ||
| Finished secondary | 36.8 | 37.5 | 30.4 | ||
| At least some tertiary | 41.6 | 39.9 | 56.5 | ||
| SES | 0.46 | 0.795 | |||
| Low SES area | 22.5 | 23.1 | 17.4 | ||
| Moderate SES area | 38.5 | 38.0 | 43.5 | ||
| High SES area | 39.0 | 38.9 | 39.1 | ||
| Advertisement condition | 3.67 | 0.055 | |||
| Pam Laffin | 53.7 | 55.8 | 34.8 | ||
| Rick Stoddard—46 Years Old | 46.3 | 44.2 | 65.2 | ||
| Conversation condition | 0.67 | 0.415 | |||
| No conversation | 52.8 | 51.9 | 60.9 | ||
| Conversation | 47.2 | 48.1 | 39.1 |
t Tests (degrees of freedom=229) and χ2 (with degrees of freedom of 1 or 2) tested differences in the distribution of characteristics among those participants who were and were not followed-up. Due to rounding, percentages may not total to 100.
SES, socioeconomic status.