Objective: To verify whether the Credibility Indicator is able to evaluate the quality of websites. Method: This is a descriptive cross-sectional study of websites on diet and anorexia ⁄ bulimia, using searches on Google to access the study population. Quality was studied using 22 variables selected by consolidating international proposals. In addition, eight variables belonging to the Credibility Indicator were also studied. Results: Three hundred and fifty four homepages relating to diet and 366 homepages relating to anorexia ⁄ bulimia were evaluated. None of the websites met all of the quality criteria; neither did any website satisfy all of the Credibility Indicators. A positive correlation was observed between fulfilment of the Quality items and the Credibility Indicator (R = 0.72; P < 0.001). Significant differences were found in the fulfilment of the Total Quality variables between the websites that had these variables and those that did not (t-test = )9.91, P < 0.001).Conclusions: The quality of websites covering issues of diet and anorexia ⁄ bulimia is still poor. The Credibility Indicator is a useful aid when determining the quality of a website. It is evident that identifying authorship and affiliation is an important factor in predicting the quality of the information.Keywords: anorexia nervosa, bulimia nervosa, diet, communication health, information dissemination, internet, quality control. Key messages Implications for Practice• The need to evaluate the abundance of health-related information available on the Internet.• The poor quality of websites related to diet and anorexia ⁄ bulimia.• Knowing the authorship and affiliation of the website, regardless whether the website is specifically related to diet or anorexia ⁄ bulimia, is an important factor in predicting the quality of the information.• The Credibility Indicator is a useful aid when determining the quality of a website.• It is useful to note whether the website benefits from quality accreditation certification from organizations such as HONcode and Web Médica Acreditada, which would provide the necessary confidence in the website content. Implications for Policy• Those responsible for health-related websites should consider the quality criteria set out by the main international health agencies.• Evaluating the quality of health-related websites is necessary.• It may be necessary to insist on the construction of Quality Indicators, which are readily understood, to evaluate effectively the many health-related websites.

The way in which the quality of life related to health (HRQoL) is affected by the nutritional status of the patient is a subject of constant interest and permanent debate. The purpose of the present paper is to review those studies that relate HRQoL to nutritional status and examine the tools (questionnaires) that they use to investigate this relationship. A critical review of published studies was carried out via an investigation of the following databases: MEDLINE (via PubMed); EMBASE; The Cochrane Library; Cumulative Index to Nursing and Allied Health Literature (CINAHL); Institute for Scientific Information (ISI) Web of Science; Latin American and Caribbean Health Sciences Literature (LILACS); Spanish Health Sciences Bibliographic Index (IBECS). The search was carried out from the earliest date possible until July 2007.The medical subject heading terms used were 'quality of life', 'nutritional status' and 'questionnaires'. The articles had to contain at least one questionnaire that evaluated quality of life. Twenty-eight documents fulfilling the inclusion criteria were accepted, although none of them used a specific questionnaire to evaluate HRQoL related to nutritional status. However, some of them used a combination of generic questionnaires with the intention of evaluating the same. Only three studies selectively addressed the relationship between nutritional status and quality of life, this evaluation being performed not by means of specific questionnaires but by statistical analysis of data obtained via validated questionnaires.

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Objetivo: Evaluar la calidad documental de las páginas Web relacionadas con el Hospital a Domicilio.Método: Estudio transversal de los Websites sobre Hospital a Domicilio, accediendo a la población a estudio a través de la búsqueda en Google, teniendo en cuenta la “falacia muestral” de este buscador. La calidad se estudió utilizando las 8 variables pertenecientes al Indicador de Credibilidad (IC).Resultado: Se evaluaron un total de 215 páginas activas, que pertenecían principalmente a medios de comunicación. No se encontró ninguna Web que cumpliera con los 8 criterios del IC; obteniéndose Media de 2,12 ± 0,07; Mínimo de 0 y Máximo de 5; Mediana igual a 3. De las Webs estudiadas, 74 (34,42%) presentaban simultáneamente autoría y filiación, existiendo asociación con el cumplimiento del IC con las páginas que disponían de estas 2 variables (p < 0,001).Conclusiones: Existió una baja calidad de las páginas Web relacionadas con el Hospital a Domicilio. En este estudio se confirmó que la existencia de autoría y filiación fueron un factor pronóstico de la calidad de las Webs analizadas. El Indicador de Credibilidad fue una ayuda a la hora de conocer la calidad de un sitio Web.