We thank Mr Currie for his interest in our study and are pleased to address his concerns. First, we agree that collecting data over a longer period may have enhanced the reliability of our estimates and further detailed individual variation in sleep behavior. However, the desire to maximize the amount of data collected was tempered by feasibility considerations; previous research has shown that adherence to self-monitoring declines markedly after a 1- to 2-week monitoring period.1 Moreover, although the children kept the sleep journal for “just 7 days,” this period was longer than that used in much prior research and provided important data compared with single-night or retrospective summary estimates.
Spilsbury JC, Storfer-Isser A, Drotar D, et al. Sleep Behavior in an Urban US Sample of School-Aged Children: A Critical Appraisal—Reply. Arch Pediatr Adolesc Med. 2005;159(8):787–788. doi:https://doi.org/10.1001/archpedi.159.8.787-b
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