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Smoking behaviour / number of cigarettes per day / attitude of parents towards smoking / use of alcohol, kind of drinks / r. drunk at last occasion / how and did r. get the drinks / opinions of parents about drinking alcohol by r. / knowledge and use of soft drugs, use of it by friends and opinion of parents / use of sleeping pills, tranquillizers, cocaine, heroine, xtc, amphetamine / absenteeism Background variables: basic characteristics/ place of birth/ residence/ household characteristics/ occupation/employment/ education/ religion</p>"}}]},{"typeName":"subject","multiple":true,"typeClass":"controlledVocabulary","value":["Social Sciences"]},{"typeName":"keyword","multiple":true,"typeClass":"compound","value":[{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"children"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"drugs"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"education"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"youth"}}]},{"typeName":"productionDate","multiple":false,"typeClass":"primitive","value":"1990-07-01"},{"typeName":"contributor","multiple":true,"typeClass":"compound","value":[{"contributorName":{"typeName":"contributorName","multiple":false,"typeClass":"primitive","value":"Ministerie van welzijn, volksgezondheid en cultuur * Rijswijk"}},{"contributorName":{"typeName":"contributorName","multiple":false,"typeClass":"primitive","value":"Nederlands instituut voor alcohol en drugs NIAD * Utrecht (research initiator)"}},{"contributorName":{"typeName":"contributorName","multiple":false,"typeClass":"primitive","value":"Regionale GGD&apos;en, afdelingen jeugdgezondheidszorg (data collector)"}}]},{"typeName":"distributionDate","multiple":false,"typeClass":"primitive","value":"2008-11-07"},{"typeName":"dateOfDeposit","multiple":false,"typeClass":"primitive","value":"2008-11-07"},{"typeName":"dateOfCollection","multiple":true,"typeClass":"compound","value":[{"dateOfCollectionStart":{"typeName":"dateOfCollectionStart","multiple":false,"typeClass":"primitive","value":"1990-03-01"},"dateOfCollectionEnd":{"typeName":"dateOfCollectionEnd","multiple":false,"typeClass":"primitive","value":"1990-07-01"}}]}]},"dansRights":{"displayName":"Rights Metadata","name":"dansRights","fields":[{"typeName":"dansRightsHolder","multiple":true,"typeClass":"primitive","value":["Unknown"]},{"typeName":"dansPersonalDataPresent","multiple":false,"typeClass":"controlledVocabulary","value":"Unknown"},{"typeName":"dansMetadataLanguage","multiple":true,"typeClass":"controlledVocabulary","value":["English"]}]},"dansRelationMetadata":{"displayName":"Relation Metadata","name":"dansRelationMetadata","fields":[{"typeName":"dansAudience","multiple":true,"typeClass":"primitive","value":["https://www.narcis.nl/classification/D52000","https://www.narcis.nl/classification/D61000"],"expandedvalue":[{"@id":"https://www.narcis.nl/classification/D52000","termName":[{"lang":"nl","value":"Onderwijskunde"},{"lang":"en","value":"Educational theory"}],"vocabularyUri":"https://www.narcis.nl/classification/"},{"@id":"https://www.narcis.nl/classification/D61000","termName":[{"lang":"nl","value":"Sociologie"},{"lang":"en","value":"Sociology"}],"vocabularyUri":"https://www.narcis.nl/classification/"}]},{"typeName":"dansCollection","multiple":true,"typeClass":"primitive","value":["https://vocabularies.dans.knaw.nl/collections/ssh/371eda80-0caa-420f-b0f5-0d3c0daf4d51"],"expandedvalue":[{"@id":"https://vocabularies.dans.knaw.nl/collections/ssh/371eda80-0caa-420f-b0f5-0d3c0daf4d51","vocabularyUri":"https://vocabularies.dans.knaw.nl/collections"}]},{"typeName":"dansRelation","multiple":true,"typeClass":"compound","value":[{"dansRelationType":{"typeName":"dansRelationType","multiple":false,"typeClass":"controlledVocabulary","value":"relation"},"dansRelationText":{"typeName":"dansRelationText","multiple":false,"typeClass":"primitive","value":"Zwart, W.M. de\\; 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