Stress Disorders, Posttraumatic, Tobacco Use Disorder
Conditions
Keywords
Stress Disorders, Posttraumatic, Tobacco Use Disorder
Brief summary
This study seeks to evaluate the relationship between PTSD, abstinence, and factors associated with relapse in the context of a randomized, clinical smoking cessation trial.
Detailed description
Smokers with PTSD will be randomly assigned to 1 of 2 pre-cessation patch therapy conditions (active patch versus placebo patch) for three weeks before a target quit-smoking date. All participants to will receive bupropion beginning 1 week prior to their quit day, given that they are medically eligible to be prescribed bupropion. All participants will receive a two session brief cognitive-behavioral therapy (CBT) session and will begin standard nicotine replacement therapy (NRT) on their quit day. PTSD symptoms, mood, and smoking craving will be carefully evaluated throughout the study using electronic diary assessments on personal digital assistants (PDA). Specifically, participants will carefully monitor their symptoms, mood, craving, and use of cigarettes using electronic diaries for one week prior to the pre-cessation period, during the 3-week pre-cessation treatment period, and 6 weeks post quit date. Since no previous study has examined factors associated with smoking abstinence following treatment among PTSD smokers10, predictors of treatment response will be examined. The study is designed to address the following items: Specific Aim 1: To evaluate whether supplemental nicotine administration (i.e., pre-cessation treatment with nicotine patch and bupropion) will result in improved quit rates among smokers with PTSD. Hypothesis 1.1 Supplemental nicotine administration during the pre-cessation period will result in improved quit rates in the first quit week over the placebo patch condition. Specific Aim 2: To utilize electronic diary assessment of PTSD symptoms, mood, smoking craving, and smoking during baseline, pretreatment, and quit periods to evaluate potential mechanisms of how pretreatment with the nicotine patch may increase abstinence rates. Hypothesis 2.1 Supplemental nicotine administration will decrease craving for cigarettes during the 2 week pretreatment period as compared to the placebo patch condition. Hypothesis 2.2 Supplemental nicotine administration will decrease the perceived improvement in mood and PTSD symptoms associated with smoking behavior, i.e., symptom relief from ad lib smoking a cigarette will be reduced during supplemental nicotine administration as compared to the placebo patch condition. Specific Aim 3: To investigate potential predictors of smoking abstinence and relapse associated with individual differences in affective style including anxiety sensitivity, measures of distress tolerance, and self-efficacy. Hypothesis 3.1 Increased anxiety sensitivity will be predictive of shorter abstinence from smoking. Hypothesis 3.2 Decreased distress tolerance will be predictive of shorter abstinence. Hypothesis 3.3 Lower self-efficacy for smoking abstinence will be predictive of shorter abstinence. Hypothesis 3.4 Increased PTSD symptoms severity and negative affect following the quit date will be associated with shorter abstinence.
Interventions
Delivered through transdermal nicotine patch
Manualized protocol for CBT in smoking cessation
Antidepressant
Pre-treatment placebo transdermal patch
Sponsors
Study design
Eligibility
Inclusion criteria
* Smokers who smoke 10 or more cigarettes per day in the past year; * 18-80 years old; * English speakers; * medically stable; * stable on current medication regimen
Exclusion criteria
* Pregnant women excluded; * participants with organic mental disorder, schizophrenia, bipolar disorder, lifetime but not current PTSD, current substance abuse or dependence; * medical conditions contraindicated with nicotine replacement therapy; * use other forms of nicotine (cigars, nicotine gum, etc.)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Smoking Abstinence, Self-reported | Week prior to Session 12 at 6 weeks post-treatment | Number of participants by group reporting 1 week of self-reported abstinence in the week prior to Session 12 at six weeks post-treatment |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Carbon Monoxide Monitoring | Session 12 (6 weeks post-treatment) | Number of participants whose carbon monoxide (CO) measurement indicated abstinence at Session 12 (6 weeks post-treatment) |
| Smoking Craving | Daily between visits 2-12 | Mean smoking craving score (as measured during daily ecological momentary, or diary, assessments) for participants by group during the two week period of placebo/active pre-treatment. This is the main period of interest, as it was hypothesized that use of active nicotine patch would reduce smoking cravings during the pre-quit period. The craving score is based on a single diary item Please rate your desire to smoke right now with a Likert scale score ranging from 1 (none) to 5 (severe). Higher craving is worse, as lower craving is presumed to reflect decreased risk of smoking lapse or relapse. |
Countries
United States
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| Arm 1 Transdermal nicotine patch
Nicotine: Delivered through transdermal nicotine patch
Cognitive Behavioral Therapy for Smoking Cessation: Manualized protocol for CBT in smoking cessation
Bupropion SR: Antidepressant | 38 |
| Arm 2 Transdermal placebo patch
Cognitive Behavioral Therapy for Smoking Cessation: Manualized protocol for CBT in smoking cessation
Bupropion SR: Antidepressant | 44 |
| Total | 82 |
Withdrawals & dropouts
| Period | Reason | FG000 | FG001 | FG002 |
|---|---|---|---|---|
| Overall Study | Lost to Follow-up | 3 | 2 | 0 |
| Overall Study | Withdrawal by Subject | 1 | 0 | 5 |
Baseline characteristics
| Characteristic | Total | Arm 1 | Arm 2 |
|---|---|---|---|
| Age, Continuous | 44.79 years STANDARD_DEVIATION 10.51 | 45.16 years STANDARD_DEVIATION 9.61 | 44.48 years STANDARD_DEVIATION 11.31 |
| Ethnicity (NIH/OMB) Hispanic or Latino | 2 Participants | 2 Participants | 0 Participants |
| Ethnicity (NIH/OMB) Not Hispanic or Latino | 79 Participants | 35 Participants | 44 Participants |
| Ethnicity (NIH/OMB) Unknown or Not Reported | 1 Participants | 1 Participants | 0 Participants |
| Race (NIH/OMB) American Indian or Alaska Native | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) Asian | 1 Participants | 1 Participants | 0 Participants |
| Race (NIH/OMB) Black or African American | 51 Participants | 21 Participants | 30 Participants |
| Race (NIH/OMB) More than one race | 6 Participants | 4 Participants | 2 Participants |
| Race (NIH/OMB) Native Hawaiian or Other Pacific Islander | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) Unknown or Not Reported | 1 Participants | 1 Participants | 0 Participants |
| Race (NIH/OMB) White | 23 Participants | 11 Participants | 12 Participants |
| Region of Enrollment United States | 82 participants | 38 participants | 44 participants |
| Sex: Female, Male Female | 38 Participants | 17 Participants | 21 Participants |
| Sex: Female, Male Male | 44 Participants | 21 Participants | 23 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk |
|---|---|---|
| deaths Total, all-cause mortality | — / — | — / — |
| other Total, other adverse events | 12 / 38 | 16 / 44 |
| serious Total, serious adverse events | 0 / 38 | 2 / 44 |
Outcome results
Smoking Abstinence, Self-reported
Number of participants by group reporting 1 week of self-reported abstinence in the week prior to Session 12 at six weeks post-treatment
Time frame: Week prior to Session 12 at 6 weeks post-treatment
Population: Any participants who did not attend Session 12 for any reason (i.e., lost to contact, withdrawn after beginning treatment) were counted as smoking (i.e., intent-to-treat analyses, missing = smoking).
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Active Nicotine Patch Group | Smoking Abstinence, Self-reported | 5 participants |
| Placebo Patch Group | Smoking Abstinence, Self-reported | 11 participants |
Carbon Monoxide Monitoring
Number of participants whose carbon monoxide (CO) measurement indicated abstinence at Session 12 (6 weeks post-treatment)
Time frame: Session 12 (6 weeks post-treatment)
Population: Please note that this secondary outcome (bioverification by CO reading) is not a measure of complete smoking abstinence during the study period (or during the week prior to the session - see Primary Outcome). It is independent of self-reported smoking abstinence. It is not unexpected that CO readings different than self-reported smoking.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Active Nicotine Patch Group | Carbon Monoxide Monitoring | 8 participants |
| Placebo Patch Group | Carbon Monoxide Monitoring | 5 participants |
Smoking Craving
Mean smoking craving score (as measured during daily ecological momentary, or diary, assessments) for participants by group during the two week period of placebo/active pre-treatment. This is the main period of interest, as it was hypothesized that use of active nicotine patch would reduce smoking cravings during the pre-quit period. The craving score is based on a single diary item Please rate your desire to smoke right now with a Likert scale score ranging from 1 (none) to 5 (severe). Higher craving is worse, as lower craving is presumed to reflect decreased risk of smoking lapse or relapse.
Time frame: Daily between visits 2-12
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Active Nicotine Patch Group | Smoking Craving | 2.48 units on a scale | Standard Deviation 1.4 |
| Placebo Patch Group | Smoking Craving | 2.59 units on a scale | Standard Deviation 1.24 |