Snow Control 2.0 - web-based interventions for the reduction of cocaine use

Snow Control 2.0 - the effects of chat-counseling and web-based self-help, web-based self-help alone and a waiting list control program on cocaine use in problematic cocaine users: a randomized controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN12205466

Enrollment

432

Registered

2015-02-24

Start date

2015-03-01

Completion date

Unknown

Last updated

2019-10-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Problematic cocaine use. Mental and Behavioural Disorders

Interventions

Study interventions: The intervention in the first arm consists of the web-based self-help intervention from study arm two in combination with three individual chat-counseling sessions

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Cocaine use > 4 occasions last 30 days 2. Minimal age of 18 years

Exclusion criteria

Exclusion criteria: 1. Participation in other psycho-social or pharmacological treatments for the reduction/cessation of cocaine use 2. Opioid use during last 30 days (exception: substitution maintenance treatment for opioid dependence without heroin use last 30 days) 3. Ever been in treatment for cardiovascular problems or apoplexy

Design outcomes

Primary

Measure	Time frame
The weekly quantity of cocaine use expressed in grams in the consumption diary, a measurement that has been shown to be very promising in the first preliminary Snow Control study.	—

Secondary

Measure	Time frame
1. Severity of Dependence Scale (SDS), a 5-item questionnaire that indicates the severity of dependence on cocaine. Each of the five items is scored on a 4-point scale (0-3). The total score is obtained through the addition of the 5 item ratings. High scores indicate a high level of dependency. 2. The weekly number of cocaine use days in the last 30 days 3. The “Fragebogen Substanzanamnese” (FDA) that ascertains the years of lifetime consumption, the past month’s consumption, and the way of consumption for the DSM-IV/ICD-10 substances of abuse. This measure was derived from the EuropeASI. 4. The short version of the Mental Health Inventory (MHI-5) which is a validated and user-friendly self-assessment questionnaire that assesses recent mental distress and self-reported diagnoses of depression. 5. The Social Support Appraisals (SS-A) Scale is a 23 item outcome measure assessed by a four point Likert scale ranging from 1 (strongly agree) to 4 (strongly disagree) that measures subjective appraisal of social support, designed to tap into the extent to which an individual believes that he or she is loved by, esteemed by, and involved with family, friends and others. This measure has been shown to predict relationships with a range of measures of support appraisals, support resources, and psychological distress. 6. The Working Alliance Inventory (WAI-SR) is a 12-item, self-report questionnaire consisting of three subscales designed to assess three primary components of the working alliance. 6.1. How closely client and therapist agree on and are mutually engaged in the goals of treatment 6.2. How closely client and therapist agree on how to reach the treatment goals 6.3. The degree of mutual trust, acceptance, and confidence between client and therapist. The composite score is used as a global measurement of working alliance. Respondents are asked	—

Measure

Time frame

1. Severity of Dependence Scale (SDS), a 5-item questionnaire that indicates the severity of dependence on cocaine. Each of the five items is scored on a 4-point scale (0-3). The total score is obtained through the addition of the 5 item ratings. High scores indicate a high level of dependency. 2. The weekly number of cocaine use days in the last 30 days 3. The “Fragebogen Substanzanamnese” (FDA) that ascertains the years of lifetime consumption, the past month’s consumption, and the way of consumption for the DSM-IV/ICD-10 substances of abuse. This measure was derived from the EuropeASI. 4. The short version of the Mental Health Inventory (MHI-5) which is a validated and user-friendly self-assessment questionnaire that assesses recent mental distress and self-reported diagnoses of depression. 5. The Social Support Appraisals (SS-A) Scale is a 23 item outcome measure assessed by a four point Likert scale ranging from 1 (strongly agree) to 4 (strongly disagree) that measures subjective appraisal of social support, designed to tap into the extent to which an individual believes that he or she is loved by, esteemed by, and involved with family, friends and others. This measure has been shown to predict relationships with a range of measures of support appraisals, support resources, and psychological distress. 6. The Working Alliance Inventory (WAI-SR) is a 12-item, self-report questionnaire consisting of three subscales designed to assess three primary components of the working alliance. 6.1. How closely client and therapist agree on and are mutually engaged in the goals of treatment 6.2. How closely client and therapist agree on how to reach the treatment goals 6.3. The degree of mutual trust, acceptance, and confidence between client and therapist. The composite score is used as a global measurement of working alliance. Respondents are asked

—

Countries

Switzerland

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 17, 2026