title: Study population, questionnaire, data management and sample description.
abstract: BACKGROUND
  This article describes methodological issues of the "Sportello Salute Giovani" project ("Youth Health Information Desk"), a multicenter study aimed at assessing the health status and attitudes and behaviours of university students in Italy.
  
  
  METHODS
  The questionnaire used to carry out the study was adapted from the Italian health behaviours in school-aged children (HBSC) project and consisted of 93 items addressing: demographics; nutritional habits and status; physical activity; lifestyles; reproductive and preconception health; health and satisfaction of life; attitudes and behaviours toward academic study and new technologies. The questionnaire was administered to a pool of 12 000 students from 18 to 30 years of age who voluntary decided to participate during classes held at different Italian faculties or at the three "Sportello Salute Giovani" centers which were established in the three sites of the Università Cattolica del Sacro Cuore (Catholic University of the Sacred Heart of Rome).
  
  
  RESULTS
  The final study sample was composed by 8516 university students. The mean age of responders was 22.2 (Standard Deviation 2.0) and 5702 (67.0%) were females. According to the distribution in age classes, 3601 (43.3%) belonged to the 18-21 one, 3796 (44.5%) to the 22-24 class and 1019 (12.2%) to the 25-30 class. With respect to socio-economic status, data were available for 8410 responders and showed that 50.3% of students belonged to the middle class.
  
  
  CONCLUSIONS
  The project took into consideration a large number of individuals from different regions of the country and therefore may be considered representative of the general population of Italian university students. Furthermore, it is the first to address, at the same time, several issues, in particular attitudes and behaviours toward health, in Italian university students.
  
  
  CONCLUSIONS
  The analysis of data from such a large sample of university students sets the basis for identifying the most appropriate interventions in order to address the specific needs of this population.
authors.affiliation: Istituto di Sanità Pubblica, Sezione di Igiene, Università Cattolica del Sacro Cuore, Rome, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: de Waure
authors.affiliation: Istituto di Sanità Pubblica, Sezione di Igiene, Università Cattolica del Sacro Cuore, Rome, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Poscia
authors.affiliation: Istituto di Sanità Pubblica, Sezione di Igiene, Università Cattolica del Sacro Cuore, Rome, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Virdis
authors.forename: Maria Luisa
authors.initials: ML
authors.lastname: Di Pietro
authors.affiliation: Istituto di Sanità Pubblica, Sezione di Igiene, Università Cattolica del Sacro Cuore, Rome, Italy.
authors.forename: Walter
authors.initials: W
authors.lastname: Ricciardi
mesh_terms: D000293:Adolescent; D000328:Adult; D015340:Epidemiologic Research Design; D015444:Exercise; D005247:Feeding Behavior; D005260:Female; D006304:Health Status; D006801:Humans; D007558:Italy; D008019:Life Style; D008297:Male; D015337:Multicenter Studies as Topic; D013334:Students / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D014495:Universities; D055815:Young Adult