Adaptation and study of the measurement properties of a sleep questionnaire for infants and pre-school children

INTRODUCTIONAlthough sleep disturbances in infants and toddlers are common, there is no suitable validated tool in Spanish to evaluate sleep disorders. The Brief Infant Sleep Questionnaire (BISQ) is a well-established multidimensional questionnaire widely used internationally. OBJECTIVESTo adapt the BISQ questionnaire to Spanish and analyse its reliability and validity. To explore its feasibility, both in the clinical context, and in epidemiological research. METHODSParticipants were parents of children between 3 and 30 months of age. The adaptation to Spanish (BISQ-E) was achieved by using both back translation and consensus, following the international guidelines.Reliability was determined by means of test-retest and measurement of agreement (Kappa value) between 2forms of administration of the questionnaire (self-administration and clinical interview). Construct validity was established by analysing its correlation with a sleep diary. RESULTSA total of 87 families/children participated. The test-retest reliability undertaken in 60 subjects was excellent; r = 0.848 (P