In epidemiological studies of asthma, questionnaires are widely accepted methods of identifying affected subjects. International Study of Asthma and Allergies in Childhood (ISAAC) is an international project aiming to determine the prevalence of asthma, allergic rhinitis and eczema in children living in different countries [1]. The written questionnaire includes questions on respiratory symptom...

Dear Sir, Having recently completed the data interpretation of a postal questionnaire of 'all' Otolaryngologists in the British Isles, we read with interest the recent correspondence on the subject of the accuracy of this means of gathering information. (November 1989, 1103), and of the validity of the numbers questioned and responding. Like the correspondents, we also had great difficulty in c...

The development of a questionnaire or a measuring instrument is a laborious and complex process and requires verification of its usefulness before implementation. We present a methodological work on the psychometric characteristics of assessment instruments and analysis of their main features, reliability, and validity. © 2008 Elsevier España, S.L. All rights reserved. Validación de cuestionarios

Tramadol is an opioid analgesic with the potential for addiction to other opioids, and one of the abused drugs in different countries including Iran. The present study was conducted to determine the prevalence and factors relating to tramadol abuse among higher education students in the city of Damghan in 2016. The present descriptive-analytical study enrolled 730 students from seven higher edu...

BACKGROUND Several instruments, notably Buss and Perry's Aggression Questionnaire, have been developed for the assessment of aggressive behavior. However, in these instruments, the focus has been on reactive rather than instrumental forms of aggression, even though men in particular may find aggressive behavior attractive. A questionnaire or structured interview for the systematic assessment of...

BACKGROUND Between June 2012 and December 2013 Médecins Sans Frontières launched a pilot project with the aim of testing a strategy for improving timely diagnosis of active pulmonary TB among migrants hosted in four centres of identification and expulsion (CIE) in Italy. METHODS This is a descriptive study. For active TB case finding we used an active symptom screening approach among migrants...