Vanessa Machado1,2, João Botelho1,2, Catarina Ramos3, Luís Proença4, Ricardo Alves1,2, Maria Alzira Cavacas2, José João Mendes2. 1. Periodontology Department, Clinical Research Unit (CRU), Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Universitário Egas Moniz (IUEM), Almada, Portugal. 2. Clinical Research Unit (CRU), CiiEM, IUEM, Almada, Portugal. 3. Psychology Laboratory (LabPsi), CiiEM, IUEM, Almada, Portugal. 4. Quantitative Methods for Health Research (MQIS), CiiEM, IUEM, Almada, Portugal.
Abstract
AIM: To investigate the psychometric properties of the validated Portuguese version of the Brief Illness Perception Questionnaire (Brief-IPQ) in patients with gingivitis and periodontitis. MATERIAL AND METHODS: This study enrolled 571 patients with periodontal diseases (PDs) (67 gingivitis and 504 periodontitis cases), in a population-based epidemiologic survey conducted at the health centres in the South Lisbon Metropolitan Area. Brief-IPQ, a 9-item self-reported scale, reliability was evaluated using Cronbach's alpha. Confirmatory factor analysis (CFA) was used to construct validation. Multigroup analysis tested invariance across gender. RESULTS: The Brief-IPQ showed acceptable reliability (α = .80). Confirmatory factor analysis revealed good model fit (χ2 (16) = 41.236, GFI = 0.982, CFI = 0.985, RMSEA = 0.053). All factors loaded similarly to the original Brief-IPQ scale, with the exception of the "personal control" domain. Periodontal patients downgrade its illness and likely impact. The "consequences" domain showed significant positive correlations with all factors, except "treatment control" and "understanding" domains. The "concern" and "emotional response" domains had the highest significant correlation. Multigroup analysis findings supported factor invariance across the sex groups. CONCLUSION: The Brief-IPQ revealed acceptable reliability, construct factorial validity and invariance across gender. This short instrument may be used as an easily applicable and valuable tool to determine illness perception in patients with PDs.
AIM: To investigate the psychometric properties of the validated Portuguese version of the Brief Illness Perception Questionnaire (Brief-IPQ) in patients with gingivitis and periodontitis. MATERIAL AND METHODS: This study enrolled 571 patients with periodontal diseases (PDs) (67 gingivitis and 504 periodontitis cases), in a population-based epidemiologic survey conducted at the health centres in the South Lisbon Metropolitan Area. Brief-IPQ, a 9-item self-reported scale, reliability was evaluated using Cronbach's alpha. Confirmatory factor analysis (CFA) was used to construct validation. Multigroup analysis tested invariance across gender. RESULTS: The Brief-IPQ showed acceptable reliability (α = .80). Confirmatory factor analysis revealed good model fit (χ2 (16) = 41.236, GFI = 0.982, CFI = 0.985, RMSEA = 0.053). All factors loaded similarly to the original Brief-IPQ scale, with the exception of the "personal control" domain. Periodontal patients downgrade its illness and likely impact. The "consequences" domain showed significant positive correlations with all factors, except "treatment control" and "understanding" domains. The "concern" and "emotional response" domains had the highest significant correlation. Multigroup analysis findings supported factor invariance across the sex groups. CONCLUSION: The Brief-IPQ revealed acceptable reliability, construct factorial validity and invariance across gender. This short instrument may be used as an easily applicable and valuable tool to determine illness perception in patients with PDs.
Authors: Vanessa Machado; André Mendonça; Luís Proença; José João Mendes; João Botelho; Daniel W McNeill; Ana Sintra Delgado Journal: J Pers Med Date: 2022-04-22
Authors: José João Mendes; João Viana; Filipe Cruz; Lisetty Garrido; Iolanda Jessen; Joana Rodrigues; Luís Proença; Ana Sintra Delgado; Vanessa Machado; João Botelho Journal: PLoS One Date: 2022-06-10 Impact factor: 3.752
Authors: José João Mendes; João Viana; Filipe Cruz; Dinis Pereira; Sílvia Ferreira; Paula Pereira; Luís Proença; Vanessa Machado; João Botelho; João Rua; Ana Sintra Delgado Journal: Int J Environ Res Public Health Date: 2021-01-02 Impact factor: 3.390
Authors: Diego Gómez-Costa; Jesús San-Roman-Montero; Rosa Rojo; Ángel Gil; Rafael Gómez de Diego; Antonio F López-Sánchez Journal: BMC Oral Health Date: 2021-04-28 Impact factor: 2.757
Authors: Vanessa Machado; João Botelho; Luís Proença; Ricardo Alves; Maria João Oliveira; Luís Amaro; Artur Águas; José João Mendes Journal: BMC Oral Health Date: 2020-08-20 Impact factor: 2.757