The effectiveness of an indicated prevention programme for substance use in individuals with mild intellectual disabilities and borderline intellectual functioning: results of a quasi-experimental study

Esmée P Schijven, Daan H G Hulsmans, Joanneke E L VanDerNagel, Jeroen Lammers, Roy Otten, Evelien A P Poelen, Esmée P Schijven, Daan H G Hulsmans, Joanneke E L VanDerNagel, Jeroen Lammers, Roy Otten, Evelien A P Poelen

Abstract

Aims: To assess the effectiveness of Take it personal!, a prevention programme for individuals with mild intellectual disabilities and borderline intellectual functioning (MID-BIF) and substance use (SU). The prevention programme aims to reduce SU (alcohol, cannabis and illicit drugs) among experimental to problematic substance users.

Design: A quasi-experimental design with two arms and a 3-month follow-up.

Setting: Adolescents were recruited from 14 treatment centres in the Netherlands specialized in offering intra- and extramural care for people with MID-BIF and behavioural problems.

Participants: Data were collected from 66 individuals with MID-BIF assigned either to the intervention condition (n = 34) or to the control condition (n = 32).

Interventions: Take it personal! was designed to target four personality traits: sensation-seeking, impulsive behaviour, anxiety sensitivity and negative thinking. For each of these profiles, interventions were developed that were structurally the same but contained different personality-specific materials, games and exercises. The control group received care as usual.

Measurements: Primary outcomes at 3-month follow-up were frequency of SU, severity of SU and binge drinking.

Results: Results showed intervention effects for SU frequency (F(1, 50.43) = 9.27, P = 0.004) and binge drinking (F(1, 48.02) = 8.63, P = 0.005), but not for severity of SU (F(1, 42.09) = 2.20, P = 0.145).

Conclusions: A prevention programme to reduce substance use among experimental to problematic users with mild intellectual disabilities and borderline intellectual functioning helped participants to decrease substance use frequency and binge drinking.

Keywords: Alcohol; cannabis; illicit drugs; indicated prevention; intellectual disabilities; personality.

© 2020 The Authors. Addiction published by John Wiley & Sons Ltd on behalf of Society for the Study of Addiction.

Figures

Figure 1
Figure 1
Flow diagram of enrolment and retention by treatment arm
Figure 2
Figure 2
Interaction plot for intervention effects on (a) substance use frequency, (b) substance use severity, (c) binge drinking. Grey bars reflect 95% confidence intervals; y‐axis indices on graphs A and C reflect frequency scores on a five‐point scale with categories (1) ‘never’, (2) ‘less than once a month’, (3) ‘every month’, (4) ‘every week’ and (5) ‘almost every day’, while y‐axis indices in graph B reflect the sum score of 10 items with these five‐point scales assessing severity of alcohol (AUDIT) or drug (DUDIT) use. Graph A is the frequency of the substance(s) (alcohol and/or cannabis and/or other drugs) that each adolescent most frequently used at baseline. Graph B reflects the severity each adolescent's most severely used substance (alcohol or drugs) at baseline. Graph C reflects the frequency with which adolescent consume more than six glasses of alcohol per day

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Source: PubMed

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