Quality-of-life outcomes of a weight management program for adolescents based on motivational interviewing
Silvia Freira1, Helena Fonseca1, Geoffrey Williams2
1Department of Pediatrics, Faculty of Medicine, Hospital de Santa Maria, University of Lisbon, Avenida Professor Egas Moniz, 1649-035 Lisboa, Lisbon, Portugal.
Objective:
To compare motivational interviewing (MI) with conventional care regarding the health-related quality-of-life (HRQoL) of adolescents with overweight/obesity.
Methods:
RCT with parallel design, involving two groups: intervention group (MI group [MIG]) and control group (conventional intervention group [CIG]). The intervention included three 30-minute interviews 3 months apart.
Outcome:
Change in Pediatric Quality of Life Inventory (PedsQL) scores. A mixed repeated-measures analysis of variance was used to assess group versus time interactions.
Results:
Eighty-three participants finished the protocol (82% girls). MIG participants showed a significant average increase (+4.7) on the Psychosocial (t[41] = -2.388, p = .022, d = .37) and Emotional Subscales (+5.1) (t[41] = 5.733, p < .001, d = .88). CIG participants showed a significant average decrease on the Psychosocial (-6.1) (t[40] = 5.733, p < .001, d = .90), Emotional (-14.1) (t[40] = 7.249, p < .001, d = 1.13) and Social Subscales (-3.8) (t[40] = 3.782, p = .001, d = .59) and on the Total Score (-4.4) (t[40] = 3.535, p = .001, d = .55) CONCLUSION: MI improved HRQoL among overweight adolescents participating in a weight management program.
Practice Implications:
MI increases HRQoL and has the potential to benefit weight management programs for adolescents.
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