Table 6.
Associations between user characteristics and response rates: from days 28-72, imputed data.
| Characteristics | Day 28 (n=642)a | Day 35 (n=606)a | Day 42 (n=578)a | Day 72 (n=535)a | |||||
|
|
aORb (95% CI) | P value | aOR (95% CI) | P value | aOR (95% CI) | P value | aOR (95% CI) | P value | |
| Age (winsorized) | 0.99 (0.96-1.03) | .65 | 1.01 (0.97-1.05) | .65 | 1.01 (0.97-1.05) | .78 | 0.98 (0.93-1.04) | .58 | |
| Race and ethnicity (reference: white) | |||||||||
|
|
Black | 1.15 (0.62-2.16) | .65 | 0.36 (0.15-0.91) | .03 | 0.67 (0.30-1.49) | .32 | 0.86 (0.29-2.52) | .78 |
|
|
Latina | 0.63 (0.21-1.89) | .41 | 0.53 (0.15-1.83) | .31 | 0.93 (0.30-2.89) | .90 | 1.03 (0.27-3.90) | .96 |
|
|
Multiracial, Asian, AI/ANc, NHPId, other | 0.94 (0.41-2.17) | .89 | 0.79 (0.31-2.02) | .63 | 1.34 (0.54-3.32) | .52 | 1.38 (0.46-4.13) | .56 |
| Education (reference: college degree or higher) | |||||||||
|
|
High school or less | 0.55 (0.22-1.40) | .21 | 0.73 (0.26-2.07) | .56 | 0.70 (0.26-1.94) | .50 | 0.59 (0.15-2.38) | .46 |
|
|
Some college | 1.09 (0.49-2.44) | .83 | 1.48 (0.57-3.83) | .42 | 1.39 (0.54-3.54) | .49 | 0.92 (0.27-3.19) | .90 |
| Region (reference: South) | |||||||||
|
|
Northeast | 1.16 (0.58-2.34) | .68 | 0.84 (0.36-1.97) | .69 | 1.19 (0.52-2.74) | .68 | 0.79 (0.24-2.58) | .70 |
|
|
Midwest | 0.66 (0.34-1.26) | .21 | 0.89 (0.45-1.75) | .73 | 1.44 (0.75-2.77) | .27 | 0.81 (0.30-2.16) | .67 |
|
|
West | 0.82 (0.39-1.71) | .60 | 0.85 (0.38-1.91) | .69 | 0.39 (0.13-1.18) | .10 | 1.26 (0.47-3.36) | .64 |
| Cigarettes per day (reference: light) | |||||||||
|
|
Moderate | 1.09 (0.63-1.90) | .75 | 1.50 (0.83-2.71) | .18 | 0.89 (0.46-1.70) | .72 | 1.90 (0.83-4.33) | .13 |
|
|
Heavy | 0.78 (0.22-2.79) | .71 | 0.60 (0.13-2.75) | .51 | 0.86 (0.24-3.14) | .82 | 0.84 (0.10-6.96) | .87 |
| Smoking frequency (reference: nondaily) | |||||||||
|
|
Daily | 0.60 (0.31-1.17) | .14 | 0.62 (0.29-1.34) | .23 | 0.72 (0.32-1.60) | .42 | 0.36 (0.15-0.91) | .03 |
| Prequit time | 0.99 (0.94-1.03) | .54 | 1.00 (0.95-1.05) | .92 | 1.01 (0.96-1.06) | .73 | 0.95 (0.88-1.01) | .10 | |
aNumber of users who had not dropped out of the intervention and had the opportunity to respond (or not) each time smoking status was assessed; on day 72, in addition to dropouts on quit day through day 42, we excluded users whose quit days were 43-71 days before the end of the study and those who opted out on days 43-71 because they did not receive the day 72 prompt.
baOR: adjusted odds ratio.
cAI/AN: American Indian/Alaska Native.
dNHPI: Native Hawaiian and Pacific Islander.