Psychosocial effects of hypnosis in patients with obesity: a pilot randomized controlled trial

The usefulness of hypnosis in patients with obesity needs to be better understood in terms of various outcomes, in addition to weight loss. The aim of this research was to investigate the effects of hypnosis and self-hypnosis in combination with nutrition education for patients with obesity, as opposed to nutrition education alone, on the secondary outcomes of quality of life (QoL), coping strategies, and self-esteem within a randomized controlled trial (RCT). Eighty-two participants were included in this study (84.3% were women), with 41 in each group. Further, 70 participants had completed treatment. The intervention consisted of eight group sessions (about one every two weeks). Participants completed self-reported questionnaires assessing their QoL, coping strategies, and self-esteem (SF-36, CISS, SEI) before and after the intervention. Non-parametric analyses were performed. Both groups had comparable characteristics at inclusion (sociodemographic information, clinical information, and scores for the self-reported scales). At eight months (i.e. two months after intervention completion), patients from the hypnosis group used more task-oriented coping (p < .001), less emotion-oriented coping (p < .01) and distraction (p < .05), and had more energy/less fatigue (p < .001) compared to the group who did not undergo hypnosis. Other improvements were observed in the hypnosis group, but there were no significant differences compared with the non-hypnosis group in terms of QoL dimensions and general self-esteem. In conclusion, hypnosis and self-hypnosis in combination with nutrition education seem to be promising interventions to help patients deal with obesity, especially by improving their coping strategies.