Little is known about the effectiveness of laughter therapy as an adjunctive treatment for patients with addictive disorders. This study aims to evaluate the benefits of integrative laughter therapy (ILT) on levels of self-esteem, anxiety, and happiness in patients treated for addiction at a day hospital (DH). A prospective, naturalistic study with a pre-post design was conducted. All 185 participants received the standard, multicomponent treatment at the DH (treatment as usual; TAU). The participants were also invited to attend weekly ILT sessions. Upon completion of the 2-month DH treatment program, patients were classified according to their attendance at the ILT sessions: patients who attended ≥80% constituted the experimental group (TAU + ILT group) while those who attended <80% were considered controls. Although both groups achieved statistically significant increases in self-esteem and happiness with a decrease in trait anxiety, the improvement on these variables was significantly greater in the TAU + ILT group. Subject to the limitations inherent to quasi-experimental research, the findings of the present study suggest that the addition of an ILT module to the standard treatment in a DH for addictive disorders may yield greater improvement in self-esteem, anxiety, and happiness compared to TAU.
Keywords: addictive disorders; anxiety; day hospital treatment; happiness; laughter therapy; mental health nursing; quasi-experimental design; satisfaction with life; self-esteem.