Validity of the Brief Infant Sleep Questionnaire (BISQ) in Brazilian children

To investigate the validity of the Brief Infant Sleep Questionnaire (BISQ), in assessing sleep quality in childhood. This was a validation study with children from the Pelotas 2015 Birth Cohort. BISQ was applied to mothers when their children were 3, 6, 12, and 24 months of age. The poor sleep indicators analysed, as defined by BISQ, were >3 wakings per night, nocturnal wakefulness >1 h and total sleep duration <9/24 h, compared to number of...