Table 1

Comparative data of the sample in the EPISER study and of the Spanish general population

  • 1-150 Data from the Institute of National Statistics, 1999 or 1997, depending on last data available.11

  • 1-151 Social class was assigned depending on the profession of the respondent according to the protocol of the Spanish Society of Epidemiology.12

  • 1-152 Much of the difference could be explained by the fact that many of the people studying in Spain sign up at the employment offices as “unemployed”, while in the EPISER study students were not permitted to define themselves as “unemployed”.

  • 1-153 Obtained by dividing the total number of students registered at universities and professional colleges by the number of persons over 20.