Maternal caffeine consumption and infant nighttime waking: prospective cohort study.

Pediatrics · 2012 · PMC3566755 · PMID 22473365

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a decreasing trendno p-value reported

Nocturnal sleep consolidation occurs during the first 12 months after birth with a decreasing trend of daytime sleep duration. 39 In Pelotas, nighttime sleep duration was on average half an hour shorter than the observed in a birth cohort in Zurich (9.4 ± 1.8 and 10.0 ± 1.5 hours, respectively; P < .001) at the same age.

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