Main characteristics and participation rate of European adolescents included in the HELENA study

Table 4 Completion and response rates for the HELENA study questionnaires ^{§ #}

Questionnaire	n of questions	% of questionnaires in the database ¹	% of questions answered in each questionnaire ²
GQ-SES	27	97.2	95.5
NKT	46	97.2	98.4
EWI	60	96.4	99.6
FCP	196	83.6	98.1
HE	41	96.6	96.5
PA	40	92.5	96.0
PAQ	22	87.5	99.9
SQ	22	96.1	98.8
PQ	5	80.9	98.4

^§ adolescents were included in ten cities: Athens in Greece, Dortmund in Germany, Gent in Belgium, Heraklion in Greece, Lille in France, Pecs in Hungaria, Roma in Italy, Stockholm in Sweden, Vienna in Austria and Zaragoza in Spain. ^# Data collected from 2006 to 2007.
¹ Ratio of number of questionnaires available in the database to the expected number of questionnaires (according to the number of adolescents included).
² Ratio of answered questions available in the database to the expected number of questions.
GQ-SES: General questionnaire - Socio economic status questionnaire NKT: Nutrition knowledge test EWI: Eating behavior and weight problems inventory FCP: Food choices and preferences questionnaire HE : Healthy eating determinants PA: Physical activity determinants PAQ: Physical activity questionnaire SQ: Sedentary questionnaire PQ: Parental questionnaire.

ISSN: 2049-3258