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External research case study

Bedtime routines: read the intervention before the headline

The distinction between a routine study, a sleep diary, and a claim about a product.

Source checked 23 October 2026 · By Waqar Ilyas · Not clinically reviewed

The question

Mindell and colleagues examined a consistent bedtime routine and reported sleep-related and maternal-mood outcomes.

Who and what were studied

The randomized study involved infants and toddlers and their caregivers. A routine intervention was compared with a control condition over a short period. It was not an evaluation of Vayvi.

How to read the findings

The paper reports changes in the studied outcomes. Consider the participants, caregiver reporting, follow-up duration, and funding and author disclosures when deciding how much a finding can establish.

What was not demonstrated

The trial does not show that keeping a digital diary alone changes sleep, that the intervention suits every family, or that Vayvi produces the same results.

A useful record without a promise

A diary can help you describe what you observed. Preserve approximate times and missing entries, and take concerns to the appropriate professional rather than treating a graph as an assessment.

Read the original research

Mindell et al. (2009). A nightly bedtime routine: impact on sleep in young children and maternal mood. Sleep.