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Links between infant crying and sleep-waking at six weeks of age
I S James-Roberts1, S Conroy, J Hurry
1Thomas Coram Research Unit, University of London, UK.
Insights
Infant crying patterns peak at six weeks. Persistent crying in infants is linked to significantly less sleep, indicating a sleep deficit in these babies.
Area of Science:
- Pediatrics
- Developmental Psychology
- Infant Behavior
Background:
- Parental concern regarding infant crying is highest around six weeks of age.
- Understanding infant crying duration and its relationship with other behaviors is crucial for infant well-being.
Purpose of the Study:
- To investigate the relationship between infant crying duration and other daily activities like sleeping, waking, and feeding at six weeks of age.
- To compare behavioral patterns across different infant crying groups: moderate, evening peak, and persistent criers.
Main Methods:
- Diary measures were collected from three infant groups (moderate, evening peak, persistent criers) at six weeks.
- Data analyzed included time spent crying, sleeping, waking-settled, and feeding.
- Correlations and group differences in daily behaviors were examined.
Main Results:
- Significant negative correlations were observed between fuss/crying duration and sleeping time.
- Few associations were found between fuss/crying and waking or feeding behaviors.
- Persistent criers slept approximately 77 minutes less per 24 hours compared to moderate criers.
- Diurnal organization in behavior was evident across all three groups.
Conclusions:
- Persistent infant crying at six weeks is associated with a significant sleep deficit.
- Infant crying duration primarily impacts sleep, with less association with waking or feeding patterns.
- Understanding these patterns can help identify infants at risk for sleep disturbances.
Abstract:
Infant crying, and parental concern about unexplained crying, peak when infants are around 6 weeks of age. Diary measures of amounts of time infants spent crying, sleeping, waking-settled and feeding at 6 weeks were obtained in three samples: a group of moderate criers (N = 45), a group with an evening crying peak (N = 33) and a group whose fuss/crying exceeded 3 h per day (persistent criers, N = 54). Substantial negative correlations between amounts of fuss/crying and sleeping, but few associations between fuss/crying and waking or feeding, were found. The persistent criers slept an average of 77 min per 24 h less than the moderate criers. The clearest group differences were in the daytime and all three groups showed evidence of a diurnal organisation in their behaviour. Persistent crying at 6 weeks is associated with a sleeping deficit.