Longer nocturnal sleep duration is associated with higher personal-social development and communication scores in 12-month-old Iranian infants
In a sample of 646 Iranian infants, longer nocturnal sleep duration was significantly associated with higher personal-social development scores (β=0.52, p=0.03) and better communication scores (β=0.42, p=0.05). Increased night waking duration was negatively associated with personal-social (β=-0.92, p<0.001) and total ASQ scores (β=-2.01, p=0.004).
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Longer nocturnal sleep duration is associated with higher personal-social development and communication scores in 12-month-old Iranian infants The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).
The Claim
Longer nocturnal sleep duration is associated with higher personal-social development and communication scores in 12-month-old Iranian infants
This conclusion is most relevant to: 646 Iranian infants from the PERSIAN Birth Cohort in Isfahan, Iran, assessed at 12 months of age.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸The associations between infant sleep habits and neurodevelopmental outcomes at 12 months: a sub-study of the PERSIAN birth cohort. (Pediatric research, 2026) —
How It Works
The proposed biological pathway:
- ▸Longer nocturnal sleep duration may support brain maturation and synaptic plasticity
- ▸Reduced night waking duration and frequency may reflect more consolidated sleep
- ▸Consolidated sleep facilitates memory consolidation and cognitive processing
- ▸Result: Improved social, communicative, and problem-solving development
Who Might Benefit
Evidence fit by population:
- ▸646 Iranian infants from the PERSIAN Birth Cohort in Isfahan, Iran, assessed at 12 months of age
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Observational study design cannot establish causality
- ▸Sleep and developmental outcomes were measured concurrently at 12 months, limiting temporal inference
- ▸Reliance on parent-reported sleep and developmental questionnaires may introduce recall bias
Frequently Asked Questions
What sleep parameters were associated with better neurodevelopment in this study?▼
Longer nocturnal sleep duration was associated with higher personal-social and communication scores, while more night waking duration and frequency, and later sleep onset were linked to lower scores in personal-social, problem-solving, and total ASQ.
How was infant sleep measured in this study?▼
Sleep characteristics were assessed using the Brief Infant Sleep Questionnaire (BISQ), which included nocturnal and daytime sleep duration, night waking frequency and duration, sleep onset time, and sleep latency.
What population was studied in this research?▼
The study included 646 Iranian infants from the PERSIAN Birth Cohort in Isfahan, Iran, assessed at 12 months of age.
What are the clinical implications of these findings?▼
The findings suggest that routine sleep assessments and culturally sensitive sleep interventions may be important in pediatric care to support early neurodevelopment.
References
- 1.Bemanalizadeh M, Yazdi M, Yaghini O, Goli P, Daniali SS, Kelishadi R. “The associations between infant sleep habits and neurodevelopmental outcomes at 12 months: a sub-study of the PERSIAN birth cohort..” Pediatric research, 2026. PMID: 42365166 DOI: 10.1038/s41390-026-05236-5