Summary
Introduction
IPC-A is an individual intervention intended for the prevention of depression in adolescents between the ages of 12 and 18 and the treatment of mild/moderate depression in the same age group in base-level services. The intervention is implemented by social welfare or healthcare professionals who have been trained in the use of the intervention, and its aim is to prevent and alleviate depression symptoms and improve adolescents’ ability to cope with challenges related to interpersonal relationships.
Objective and research question
This systematic literature review assesses the effectiveness of the IPC-A intervention on the basis of research literature. The review answers the following questions: 1) Is the IPC-A intervention adequately documented? and 2) Does the IPC-A intervention used in Finland have evidence-based effectiveness in preventing depression or mood symptoms among adolescents between the ages of 12 and 18, or the treatment of mild or moderate depression?
Data and research methods
A systematic literature search was carried out using the PCC search strategy (Population, Concept, Context), which focused on the question: What research has been done on the IPC-A intervention? The following keywords were used: P = adolescents, C = interpersonal counselling. Context (C) was omitted to avoid an excessive restriction of the results of the search. The primary area of interest in the search was effectiveness studies carried out on the intervention. A systematic literature search was carried out for the following six reference databases: MEDLINE, APA PsycInfo, CINAHL, ERIC, Web of Science and Scopus. In addition, a search for publications in Finnish was performed on the Finna.fi service, and the search was supplemented by a manual search. The accuracy of the intervention description was evaluated on the basis of the intervention manuals and other written materials maintained by the home base.
Results
The IPC-A intervention is comprehensively documented. Two studies were found in the literature search: one was a Finnish randomised controlled trial and the other was a single-group pre-post study conducted in the UK. At this time, there is no evidence of the effectiveness of the IPC-A intervention in preventing depression in adolescents between the ages of 12 and 18 or the treatment of mild-to-moderate depression. The studies included in the review do not demonstrate a statistically significant difference from the comparison group sufficient to establish effectiveness. On the whole, the reliability of the studies was assessed to be satisfactory, and although the measurement and reproducibility of the method were, for the most part, assessed to be well-implemented, the evidence of effectiveness was weakened by limitations relating to the study designs, statistical analyses and the risk of bias.
Methodology evaluation
The intervention is well-documented and theoretically grounded, but it has not yet been demonstrated to reduce depression symptoms in adolescents between the ages of 12 and 18 when compared to a control group. The research evidence is based on one Finnish randomised controlled trial that was conducted in the 2020s, primarily in the student welfare context, and one UK study conducted in the 2010s in low-threshold services with a pre-post research design, focusing on adolescents aged 11–17 with depression symptoms.