In addition, the pilot cohort could be considered to be a select group of motivated patients, which would lead to generally higher questionnaire and questionnaire item response rates.
The survey included anthropometric measurements, child questionnaires, parent questionnaires, school-staff questionnaires and school observations to measure EBRBs and potential individual and environmental correlates of these behaviours.
All produced variations to formulate title, questionnaire items, questionnaire and scale descriptions, and their meaning had to be considered.
The "initial set" file inclusion contains five types of questionnaires: alimentary questionnaires (3 × 24 h recall); socio-demographic and lifestyle questionnaires; health questionnaires; anthropometric questionnaires; and physical activity questionnaires These have to be filled in within the 21 days following drawing of the dietary survey dates.
Specifications on the outcomes of the search strategy, questionnaire development and questionnaires will be published separately.
Close-ended questionnaires maximize questionnaire response rate and ensure questionnaire completeness [ 14].
Data was collected using a structured questionnaire; 300 questionnaires were distributed and 200 valid questionnaires were returned.
In the first wave of data collection in 2010, CFPS received a total of 14,960 valid family-member questionnaires, 14,798 household questionnaires, 33,600 adult questionnaires, and 8,990 child questionnaires.
CFPS 2010 received a total of 14,960 valid family level questionnaires, included 14,798 household questionnaires, 33,600 adult questionnaires, and 8990 child questionnaires.1 The total response rate was 81.3%%.
