Fig. 2From: A school-based nutrition education program involving children and their guardians in Japan: facilitation of guardian-child communication and reduction of nutrition knowledge disparityFlow diagram of participant selection for analysis. *In this study, the participants submitted a set of the questionnaires three times (May, October, and February). ‘Observation’ number indicates the number of analyzed questionnaires: if all questionnaires had been submitted, ‘observation’ would have been equal to triple the number of participants. However, as some questionnaires were missing in October and February, ‘observation’ is less than tripleBack to article page