EDS: E-Cigarette Dependence Scale

Foundational Context

The E-Cigarette Dependence Scale (EDS) was developed by Morean and colleagues (2019) to address the need for a nicotine dependence measure specific to vaping. Traditional tools like the Fagerström Test for Nicotine Dependence (FTND) assume cigarette-specific behaviors that do not map accurately to e-cigarette use patterns.

The EDS was purpose-built and validated in adolescent and young adult samples, making it the leading measure for clinical and research assessment of vaping addiction.

What the Assessment Measures

The EDS is a 20-item self-report measure assessing dependence across five subscales:

1. Compulsive Use: Habitual, automatic vaping behavior.
2. Time to First Use: Urgency to vape shortly after waking.
3. Craving: Strong, persistent urges to use the e-cigarette.
4. Withdrawal / Negative Reinforcement: Vaping to avoid or relieve unpleasant feelings.
5. Salience / Interference: Vaping interfering with daily activities and dominating thinking.

Each item is rated on a 5-point Likert scale (0 = Not at all to 4 = Extremely).

Interpretation Guidelines

Total score range: 0–80. Higher scores indicate greater dependence.

• 0–14: Minimal / No dependence.
• 15–29: Low dependence.
• 30–49: Moderate dependence.
• ≥50: High dependence.

Clinical Application: High scores, particularly in Craving and Withdrawal subscales, predict greater difficulty with cessation and suggest a need for more intensive support or pharmacotherapy.

Administration Considerations

• Time: Approximately 5 minutes.
• Target Population: Patients who primarily or exclusively use e-cigarettes, vape pens, or pod systems.
• Comparison: Use the EDS instead of the FTND for vaping patients to avoid underestimating dependence severity.

Psychometric Properties

• Internal Consistency: Strong reliability in both adolescent and adult samples.
• Validity: Correlates strongly with vaping frequency, nicotine concentration, and prior quit attempts.
• Validation: Morean et al. (2019).

Limitations

• Relies on self-report.
• While validated in youth and adults, no single universal clinical cutoff is formally established; interpret in the broader clinical context.

References

Morean, M. E., Bold, K. W., Kong, G., et al. (2019). Validity and reliability of the e-cigarette dependence scale. Nicotine & Tobacco Research, 21(11), 1541-1548.

Additional Context

The leading validated measure of e-cigarette and vaping dependence severity. Purpose-built for e-cigarettes, not an adaptation of cigarette-smoking scales.

EDS Scoring Guide

20 items × 0–4 scale. Total score range: 0–80.

Scoring note: Rating scale: 0 = Not at all, 1 = Slightly, 2 = Moderately, 3 = Quite a bit, 4 = Extremely. Sum all 20 items for the total score. Subscale scores can be calculated separately for clinical profiling. No single universal clinical cutoff has been formally validated, interpret in the context of the full clinical picture.

Five Dependence Subscales

The EDS measures five distinct dimensions of e-cigarette dependence

EDS vs Fagerström Test (FTND)

Why the FTND is not appropriate for e-cigarette users

Clinical note: Many patients who vape have never smoked combustible cigarettes. The FTND assumes cigarette-specific behaviors (packs per day, cigarette after waking) that don't map to vaping. Using the FTND with e-cigarette users underestimates dependence severity. Use the EDS for any patient whose primary or exclusive nicotine use is e-cigarettes or vaping devices.

Documenting EDS results in clinical notes?

Record the EDS total score and dependence level in the Objective section. Note any elevated subscale scores (e.g., high craving, early morning use) that guide the treatment plan. See our SOAP notes guide and intake notes guide.

Related Assessments

Substance use tools often administered alongside the EDS

Automate EDS Scoring in Your Clinic

HiBoop delivers EDS alongside AUDIT, DAST-10, and PHQ-9 as a linked substance use and mental health intake battery, automated scoring, longitudinal tracking, and integrated reporting.