José Camolas1, André Ferreira2, Edoardo Mannucci3, Mário Mascarenhas4, Manuel Carvalho2, Pedro Moreira5, Isabel do Carmo4, Osvaldo Santos6. 1. Serviço de Endocrinologia, Hospital de Santa Maria, CHLN/Faculdade de Medicina da Universidade de Lisboa, Piso 6, Av. Prof. Egas Moniz, 1649-035, Lisbon, Portugal. jose.camolas@gmail.com. 2. Espírito Santo Hospital, Evora, Portugal. 3. Diabetes Agency, Careggi Hospital, Florence, Italy. 4. Serviço de Endocrinologia, Hospital de Santa Maria, CHLN/Faculdade de Medicina da Universidade de Lisboa, Piso 6, Av. Prof. Egas Moniz, 1649-035, Lisbon, Portugal. 5. Faculty of Nutrition and Food Sciences, University of Porto, Porto, Portugal. 6. Instituto de Medicina Preventiva e Saúde Pública, Faculdade de Medicina da Universidade de Lisboa/DECO PROTESTE, Edf. Egas Moniz, Av. Prof. Egas Moniz, 1649-029, Lisbon, Portugal.
Abstract
PURPOSE: Several health-related quality-of-life (HRQoL) dimensions are affected by obesity. Our goal was to characterize the psychometric properties of the ORWELL-R, a new obesity-related quality-of-life instrument for assessing the "individual experience of overweightness". METHODS: This psychometric assessment included two different samples: one multicenter clinical sample, used for assessing internal consistency, construct validity and temporal reliability; and a community sample (collected through a cross-sectional mailing survey design), used for additional construct validity assessment and model fit confirmation. RESULTS: Overall, 946 persons participated (188 from the clinical sample; 758 from community sample). An alpha coefficient of 0.925 (clinical sample) and 0.934 (community sample) was found. Three subscales were identified (53.2 % of variance): Body environment experience (alpha = 0.875), Illness perception and distress (alpha = 0.864), Physical symptoms (alpha = 0.674). Adequate test-retest reliability has been confirmed (ICC: 0.78 for the overall score). ORWELL-R scores were worse in the clinical sample. Worst HRQoL, as measured by higher ORWELL-R scores, was associated with BMI increases. ORWELL-R scores were associated with IWQOL-Lite and lower scores in happiness. CONCLUSIONS: ORWELL-R shows good internal consistency and adequate test-retest reliability. Good construct validity was also observed (for convergent and discriminant validity) and confirmed through confirmatory factor analysis (in both clinical and community samples). Presented data sustain ORWELL-R as a reliable and useful instrument to assess obesity-related QoL, in both research and clinical contexts.
PURPOSE: Several health-related quality-of-life (HRQoL) dimensions are affected by obesity. Our goal was to characterize the psychometric properties of the ORWELL-R, a new obesity-related quality-of-life instrument for assessing the "individual experience of overweightness". METHODS: This psychometric assessment included two different samples: one multicenter clinical sample, used for assessing internal consistency, construct validity and temporal reliability; and a community sample (collected through a cross-sectional mailing survey design), used for additional construct validity assessment and model fit confirmation. RESULTS: Overall, 946 persons participated (188 from the clinical sample; 758 from community sample). An alpha coefficient of 0.925 (clinical sample) and 0.934 (community sample) was found. Three subscales were identified (53.2 % of variance): Body environment experience (alpha = 0.875), Illness perception and distress (alpha = 0.864), Physical symptoms (alpha = 0.674). Adequate test-retest reliability has been confirmed (ICC: 0.78 for the overall score). ORWELL-R scores were worse in the clinical sample. Worst HRQoL, as measured by higher ORWELL-R scores, was associated with BMI increases. ORWELL-R scores were associated with IWQOL-Lite and lower scores in happiness. CONCLUSIONS: ORWELL-R shows good internal consistency and adequate test-retest reliability. Good construct validity was also observed (for convergent and discriminant validity) and confirmed through confirmatory factor analysis (in both clinical and community samples). Presented data sustain ORWELL-R as a reliable and useful instrument to assess obesity-related QoL, in both research and clinical contexts.
Entities:
Keywords:
Health-related quality of life; ORWELL-R; Obesity; Validation
Authors: Paulo N Vieira; Marlene N Silva; Jutta Mata; Sílvia R Coutinho; Teresa C Santos; Luís B Sardinha; Pedro J Teixeira Journal: J Behav Med Date: 2012-09-27
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Authors: Leila Itani; Simona Calugi; Riccardo Dalle Grave; Dima Kreidieh; Germine El Kassas; Dana El Masri; Hana Tannir; Aya Harfoush; Marwan El Ghoch Journal: Med Sci (Basel) Date: 2018-03-13