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%T Concurrent and Convergent Validity of a Single, Brief Question for Physical Activity Assessment %A Moreno-Llamas, Antonio %A García-Mayor, Jesús %A De la Cruz-Sánchez, Ernesto %J International Journal of Environmental Research and Public Health %N 6 %P 1-6 %V 17 %D 2020 %K physical activity; validation studies; Eurobarometer 80.2 (2013) (ZA5877 v2.0.0); Eurobarometer 88.4 (2017) (ZA6939 v1.0.0) %@ 1660-4601 %~ FDB %> https://nbn-resolving.org/urn:nbn:de:0168-ssoar-78538-6 %X An extensive number of self-reported methods for physical activity (PA) measurement are available, including short and long recall questionnaires ranging from a few to tens of questions. Due to the fact that simple, time-saving methods could be more practical and desirable for use in a busy clinical context, as well as in public health surveys, we evaluated how a single-item question might be a useful and cost-effective method for assessing compliance with PA guidelines. Using multiple receiver operating characteristics (ROC), we assessed the classification performance of a single brief question, employing the short version of the International Physical Activity Questionnaire as criterion instrument, in a total of 55,950 people (30,601 women and 25,349 men). Both those who practice PA almost daily and a few times a week presented an upper threshold (1042.5 metabolic equivalent minutes (MET) minutes/week) to the established compliance PA guidelines (600 MET minutes/week) with high specificity and sensitivity, using a sedentary group as reference. Otherwise, the occasionally physically active group did not reach the minimum (349.5 MET minutes/week) and obtained a poorer classification performance. A single brief question is a pragmatic and alternative method for assessment of compliance with PA guidelines. %C CHE %G en %9 Zeitschriftenartikel %W GESIS - http://www.gesis.org %~ SSOAR - http://www.ssoar.info