Who has anaphylaxis in Brazil? Validation of a questionnaire for population studies

Who has anaphylaxis in Brazil? Validation of a questionnaire for population studies

Background The incidence of anaphylaxis is increasing in several parts of the world; thus, determining the prevalence of the disease in a given region is important to understand the factors involved and to promote measures to avoid this type of allergic reaction. Aiming this objective, we validated an instrument for a population-basedstudy that assesses the prevalence of anaphylaxis in the Braz...

Development and Validation of a Food Frequency Questionnaire for Assessing Dietary Calcium in Children

Background and Objectives: This study aimed to develop and validate a food frequency questionnaire (FFQ) for measuring calcium intake in 9-13 years old children in Tehran, Iran. Materials and Methods: A 56-item FFQ containing main contributors of calcium in Iranian diet was designed. Criterion validity of the calcium specific FFQ was evaluated through comparing its result with five 24-h recall...

Validation of Catquest-9SF Questionnaire in a Chinese Cataract Population

PURPOSE To develop and validate a Chinese version of the Catquest-9SF questionnaire in a cataract population. METHODS The Catquest-9SF Questionnaire was translated and back translated into Chinese. Preoperative patients were recruited at a tertiary eye hospital and their demographic information and visual acuity were documented. Psychometric properties of the Catquest-9SF, including ordered t...

Development and validation of a moral intelligence questionnaire for Adolescent children of veterans

simulation and experimental studies for prediction mineral scale formation in oil field during mixing of injection and formation water

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...