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Cigarettes Use Dependence Among Patients in Substance Use Disorder Treatment Programs: Analyses of a Pilot Randomized Clinical Trial of Smoking Harm Reduction Using E-cigarettes

Michelle He

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Introduction

  • Smoking is a leading cause that brings consequential health and social issues
  • Relatively higher prevalence among substance use disorder (SUD) patients compared to the general population
  • Smoking cessation tool: Nicotine Replacement Therapy (NRT) and Electronic Cigarettes (EC)
  • Limited studies have specifically investigated the disparities in smoking patterns among the SUD population and the potential effects of tobacco treatment programs

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Research Question and Hypothesis

  • How has cigarette dependence changed after NRT and EC interventions were assigned to SUD patients?”

  • Patients randomized to EC will lead a lower cigarette dependence at the end of intervention while the EC dependence will increase

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Methods

  • Background:
    • Datacore from Bellevue Hospital and NYU Grossman School of Medicine
    • Six-week, two-armed, randomized controlled trial
    • NRT = 23, EC =17
  • Measures:
    • Primary outcome: Fagerstrom Test of Nicotine Dependence (FTND), secondary outcomes: Minnesota Withdrawal Symptoms Scales (MNW), electronic cigarette dependence index, and reduction level no. of cigarettes per day (CPD)
    • Covariates: Gender, Ethnicity, Education level, and Marital status
  • Statistical Analyses:
    • Stata Standard Edition 17.0
    • Univariate analyses / Fisher’s Exact Test / Student’s T-Tests
    • Binomial regression to estimate the risk ratio at each level of reduction of CPD for EC against NRT

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Results

FTND at baseline (Mean, SD)

FTND at the end of treatment (Mean, SD)

P-value

E-cig

5.12 (1.45)

1.71 (2.14)

0.000

NRT

5.22 (1.57)

1.91 (1.86)

0.000

MNW at baseline (Mean, SD)

MNW at the end of treatment (Mean, SD)

P-value

E-cig

25.54 (8.95)

16.88 (8.50)

0.004

NRT

20.43 (8.23)

16.70 (8.26)

0.051

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Results

  • No difference at the level of 25% and 50% or higher.

  • EC has a higher reduction in CPD of at least 75% (p-value = 0.035) and 100% (p-value = 0.01).

  • 55.6% in the EC arm achieved complete abstinence from CC smoking whereas only 17.4% in the NRT arm

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Conclusions

  • EC has a greater effect in reducing the cigarettes smoking and withdrawal symptoms scale compared to NRT
  • Limitations
    • Selection bias: data only collected at one single center
    • Information bias: Telehealth interviews may introduce recall bias/open-ended questions
    • Limited sample size
  • As it is a pilot study there should be further studies with increased sample sizes are necessary to determine the long-term effectiveness of EC.

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References

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Thank You