The study aims to develop and assess metric proprieties of the Portuguese version of the Hospital Anxiety and Depression Scale. A sequential sample includes 1322 participants diagnosed with cancer, stroke, epilepsy, coronary heart disease, diabetes, myotonic dystrophy, obstructive sleep apnoea, depression and a non-disease group, which completed the HADS. The first step includes translation, retroversion, inspection for lexical equivalence and content validity, and cognitive debriefing. Then we reproduce oblique exploratory factor analysis and use confirmatory factor analysis. We explore the sensibility of the questionnaire. The validation process of the Portuguese HADS version shows metric properties similar to those in international studies, suggesting that it measures the same constructs, in the same way, as the original HADS form.

In the context of aquaculture, carrying capacity is generally understood as the standing stock of a particular species at which production is maximised without negatively affecting growth rates. The estimation of carrying capacity for aquaculture is a complex issue. That complexity stems from the many interactions between and among cultivated and non-cultivated species, as well as between those species and their physical and chemical environments. Mathematical models may help to resolve these interactions, by analysing them in a dynamic manner. Previous carrying capacity models have considered the biogeochemical processes that influence growth of cultivated species in great detail. However, physical processes tend to have been addressed very simplistically. Further, most modelling has been for monocultures, despite the increasing importance of multi-species (=polyculture) systems.We present here a two-dimensional coupled physical-biogeochemical model implemented for Sungo Bay, Shandong Province, People's Republic of China. Sungo Bay is used for extensive polyculture, where bivalve shellfish and kelp are the most important cultivated species. Data collected over 13 years (1983)(1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000) was available for modelling. Our main objectives were to implement the model, achieving reasonable calibration and validation with independent data sets, for use in estimating the environmental carrying capacity for polyculture of scallops and oysters.Findings indicate that the model successfully reproduces some of the main features of the simulated system. Although requiring some further work to improve predictive capability in parts, predictions clearly indicate that Sungo Bay is being exploited close to the environmental carrying capacity for suspension-feeding shellfish. Comparison of different culture scenarios also indicates that any significant increase in yield will depend largely on a more optimal spatial distribution of the different cultivated species.

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RESUMO:A necessidade de compreender as limitações e o sofrimento dos indivíduos com alterações orais constitui uma forte motivação para a avaliação da Qualidade de Vida. Este estudo visa adaptar a versão breve do Oral Health Impact Profile (OHIP-14) para a língua e cultura portuguesa e avaliar as qualidades psicométricas. Foi realizado um estudo observacional transversal, com uma amostra de conveniência de 180 indivíduos, com idades entre 18 e 93 anos (M=40,93; DP=16,27). Verificou-se uma pontuação média total de 11,84 (DP=11,14) com maior impacto nas dimensões Dor Física e Desconforto Psicológico. A fidelidade, avaliada através do alfa de Cronbach (α=0,93) e teste-reteste, com 31 participantes, revelou ser muito boa, com correlações significativas positivas, moderadas a elevadas. Para avaliar a validade de construto procedeu-se à análise fatorial pelo método de componentes principais, tratando-se de um instrumento unidimensional. A boa validade de construto foi confirmada pela relação entre autoperceção de saúde oral e OHIP-14. Revelou uma validade concorrente-discriminante aceitável, com correlações negativas fracas a moderadas entre dimensões do OHIP-14 e dimensões e componentes do MOS SF-12. O instrumento revelou ser sensível a variáveis sociodemográficas (idade, escolaridade) e clínicas (sensação de boca seca, falta de dentes naturais, utilização de prótese dentária). A versão desenvolvida possui qualidades psicométricas e clinimétricas aceitáveis. Palavras-chave: qualidade de vida, saúde oral, ohip-14, mos sf-12, psicometria. ___________________________________________________________________________ ORAL HEALTH-RELATED QUALITY OF LIFE: PORTUGUESE LINGUISTIC AND CULTURAL ADAPTATION OF OHIP-14ABSTRACT: The need to understand the limitations and the suffering of patients with oral amendments is a strong motivation for the assessment of Quality of Life. This study aims to adapt the short version of the Oral Health Impact Profile (OHIP-14) for Portuguese language and culture and to evaluate the psychometric qualities. A cross-sectional observational study was conducted with a convenience sample of 180 individuals, aged between 18 and 93 years (M= 40.93; SD = 16.27). There was an average total score of 11.84 (SD = 11.14) with the greatest impact on the dimensions Pain Physical and Psychological discomfort. Fidelity as measured by Cronbach's alpha (α = 0.93) and test-retest, with 31 participants, turned out to be very good, with positive significant correlations, moderate to high. To assess the construct validity we proceeded to the factorial analysis by the method of main components, suggesting an unidimensional instrument. The good construct validity was confirmed with significant Rua das Fábricas número 4, 4520-199 Santa Maria da Feira;