Table 1.
Quit rate | ||||||
---|---|---|---|---|---|---|
No SPD | SPD | SPD vs. no SPD | SPD vs. no SPD | |||
Characteristic | wt% (SE) | wt% (SE) | OR (95% CI) | p int | aORa (95% CI) | p int |
Total sample | 0.52 (0.01) | 0.24 (0.3) | 0.29 (0.22 to 0.34) | <.001 | 0.45 (0.32 to 0.63) | <.001 |
Gender | ||||||
Male | 0.52 (0.01) | 0.19 (0.03) | 0.23 (0.15 to 0.33) | REF | 0.33 (0.20 to 0.55) | REF |
Female | 0.52 (0.01) | 0.27 (0.04) | 0.34 (0.24 to 0.50) | .100 | 0.53 (0.36 to 0.77) | .103 |
Age (y) | ||||||
26–34 | 0.28 (0.01) | 0.17 (0.03) | 0.58 (0.36 to 0.78) | REF | 0.62 (0.41 to 0.94) | REF |
35–49 | 0.41 (0.01) | 0.21 (0.03) | 0.38 (0.27 to 0.54) | .154 | 0.46 (0.31 to 0.68) | .196 |
50–64 | 0.52 (0.01) | 0.27 (0.06) | 0.35 (0.19 to 0.65) | .231 | 0.42 (0.23 to 0.76) | .215 |
65+ | 0.77 (0.01) | 0.44 (0.12) | 0.23 (0.09 to 0.63) | .123 | 0.28 (0.10 to 0.78) | .135 |
Annual income | ||||||
<$20 000 | 0.35 (0.02) | 0.15 (0.03) | 0.33 (0.19 to 0.58) | REF | 0.39 (0.19 to 0.79) | REF |
$20 000–$49 999 | 0.47 (0.01) | 0.23 (0.04) | 0.33 (0.21 to 0.51) | .966 | 0.49 (0.30 to 0.78) | .611 |
$50 000–$74 999 | 0.55 (0.01) | 0.35 (0.10) | 0.43 (0.18 to 1.02) | .587 | 0.48 (0.21 to 1.07) | .513 |
≥$75 000 | 0.62 (0.01) | 0.36 (0.06) | 0.35 (0.20 to 0.60) | .907 | 0.42 (0.24 to 0.75) | .822 |
Race/ethnicity | ||||||
White | 0.55 (0.01) | 0.25 (0.03) | 0.27 (0.21 to 0.36) | REF | 0.46 (0.34 to 0.63) | REF |
Black | 0.39 (0.02) | 0.11 (0.05) | 0.19 (0.07 to 0.53) | .512 | 0.28 (0.09 to 0.86) | .471 |
Hispanic | 0.46 (0.02) | 0.32 (0.12) | 0.55 (0.19 to 1.60) | .187 | 0.47 (0.16 to 1.40) | .737 |
Other | 0.44 (0.03) | 0.13 (0.05) | 0.19 (0.08 to 0.45) | .463 | 0.29 (0.12 to 0.71) | .349 |
Abbreviations: CI = confidence interval; OR = odds ratio; REF, reference group; SE, standard error; SPD = serious psychological distress; wt%, weighted percentage; y, years.
p int = p value from t test for product term beta = 0; test for multiplicative interaction.
aAdjusted for all other variables listed in the table.