Table 2.
Comparison of 30-day point prevalence smoking abstinence and web site utilization by diagnostic group.
| Total (n=2,570) | No MHC (n=1,566) | BD (n=221) | AD (n=783) | FDR-adjusted overall p-value | BD vs AD OR (95% CI) | BD vs AD p-value | BD vs No MHC OR (95% CI) | BD vs No MHC p-value | Covariates (in addition to gender, education, smokes > 1 pack) | |
|---|---|---|---|---|---|---|---|---|---|---|
| Cessation outcome | ||||||||||
| 30-day PPA at 3-month follow-up, complete case, n (%) | 313 (14%), n=2274 | 197 (14%), n=1388 | 23 (12%), n=189 | 93 (13%), n=697 | 0.588 | -- | -- | -- | -- | Caucasian race, AA race, employed, CQSS |
| 30-day PPA at 3-month follow-up, missing=smoking, n (%) | 313 (12%) | 197 (13%) | 23 (10%) | 93 (12%) | 0.451 | -- | -- | -- | -- | Caucasian race, AA race, employed, CQSS |
| 30-day PPA at 6-month follow-up, complete case, n (%) | 453 (20%), n=2283 | 304 (22%), n=1390 | 26 (14%), n=193 | 123 (18%), n=700 | 0.043 | 0.67 (0.41, 1.05) | 0.090 | 0.56 (0.35, 0.87) | 0.012 | Caucasian race, AA race, CQSS, # of smokers in home |
| 30-day PPA at 6-month follow-up, missing=smoking, n (%) | 453 (18%) | 304 (19%) | 26 (12%) | 123 (16%) | 0.033 | 0.64 (0.39, 1.00) | 0.060 | 0.55 (0.35, 0.84) | 0.008 | Caucasian race, AA race, CQSS |
| 30-day PPA at 12-month follow-up, complete case, n (%) | 569 (25%), n=2249 | 393 (29%), n=1370 | 36 (20%), n=184 | 140 (20%), n=695 | <0.001 | 0.85 (0.55, 1.29) | 0.467 | 0.58 (0.38, 0.85) | 0.007 | Caucasian race, AA race, CQSS, # of smokers in home |
| 30-day PPA at 12-month follow-up, missing=smoking, n (%) | 569 (22%) | 393 (25%) | 36 (16%) | 140 (18%) | <0.001 | 0.81 (0.53, 1.21) | 0.318 | 0.57 (0.38, 0.83) | 0.005 | Caucasian race, AA race, CQSS, # of smokers in home, FTND |
| Utilization | ||||||||||
| Number of logins by 12- month follow-up, mean (sd) | AA race, age | |||||||||
| For ACT arm | 9.2 (30.3), n=1279 | 9.6 (27.8), n=800 | 13.5 (68.1), n=107 | 7.1 (12.7), n=372 | 0.003 | 1.55 (117, 2.06)a | 0.001 | 1.20 (0.93, 1.56)a | 0.157 | |
| ACT Median (IQR) | 3 (2–7) | 3 (2–7) | 2 (1–5) | 3 (2–7) | ||||||
| For CBT arm | 5.2 (12.0), n=1291 | 5.3 (14.0), n=766 | 5.2 (6.4), n=114 | 5.0 (8.6), n=411 | 0.666 | -- | -- | -- | -- | |
| CBT Median (IQR) | 3 (1–5) | 3 (1–5) | 3 (2–7) | 3 (1–5) | ||||||
| Time per login at the 12- month follow-up, minutes, mean (sd) | 5.6 (6.1), n=2570 | 5.6 (6.0), n=1558 | 5.8 (5.7), n=220 | 5.6 (6.5), n=780 | 0.805 | Age, Caucasian race, employed, # of friends who smoke, # of adults in home who smoke | ||||
| Median (IQR) | 3.9 (1.7–7.3) | 3.8 (1.7–7.4) | 4.1 (2.0–8.0) | 3.9 (1.7–7.1) | ||||||
| Number of days logged in by 12-month follow-up, mean (sd) | Age, Caucasian race, AA race, married, employed, FTND, # of friends who smoke, AIS score | |||||||||
| For ACT arm | 7.3 (22.0), n=1279 | 8.0 (24.0), n=800 | 7.9 (33.8), n=107 | 5.7 (9.4), n=372 | 0.002 | 1.06 (0.82, 1.40) | 0.635 | 0.79 (0.62, 1.02) | 0.064 | |
| ACT Median (IQR) | 3 (1–6) | 3 (2–6) | 2 (1–4) | 3 (1–6) | ||||||
| For CBT arm | 4.2 (7.1), n=1291 | 4.2 (8.0), n=766 | 4.6 (5.3), n=114 | 4.2 (5.6), n=411 | 0.707 | |||||
| CBT Median (IQR) | 2 (1–5) | 2 (1–5) | 3 (1–6) | 2 (1–4) |
Note: MHC=mental health condition; BD=bipolar disorder; AD=(other) affective disorder; FDR=false discovery rate; PPA=point prevalence abstinence; ACT=acceptance and commitment therapy; CBT=cognitive-behavioral therapy; IQR=interquartile range AA=African American; CQSS=Commitment to Quitting Smoking Scale; FTND=Fagerström Test for Nicotine Dependence, AIS=Avoidance and Inflexibility Scale.
a
Values are incidence rate ratios (IRR) from a negative binomial model.