When it comes to getting a lot of information in a short period, a questionnaire may be the answer. Questionnaires contain lists of questions in open-ended or closed-ended formats. While it takes time ...

Objective To compare three different methods of administering a brief screening questionnaire to elderly people: post, interview by lay interviewer, and interview by nurse. Design Randomised ...

The objective of this study was to conduct a method comparison of a modified food frequency questionnaire (FFQ), designed to estimate usual dietary intake of selected micronutrients and antioxidants ...

Results for the survey are based on telephone interviews conducted under the direction of Princeton Survey Research Associates International. Survey results are based on national samples. For further ...

Historically, public opinion surveys have relied on the ability to adjust their datasets using a core set of demographics – sex, age, race and ethnicity, educational attainment, and geographic region ...

Background: Reliability or validity studies are important for the evaluation of measurement error in dietary assessment methods. An approach to validation known as ...

Background The Oslo Sports Trauma Research Center questionnaire on Health problems, recently updated to a second version (OSTRC-H2), has shown a greater ability than a traditional surveillance method ...