Abstract
Abnormal autonomic function may cause false-positive non-reassuring foetal status (fpNRFS) and may also cause sleeping problems after birth. However, an association between fpNRFS and sleeping problems in infants has not been reported. We previously showed an association of NRFS with temperament, including bad mood and frequent crying for long durations in 1-month-old infants. In the present study, we aimed to assess this association in 1-year-old infants. A total of 62,612 single pregnant women were included in the analysis. fpNRFS was identified from medical records. Sleep problems, such as short sleep duration or crying at night, were investigated in 1-year-old infants using a questionnaire for mothers. We used a log-binominal regression model to explore the association of fpNRFS with each sleep problem and to estimate risk ratios (RRs). The number of fpNRFS cases was 2,071, with a frequency of 3.3%. We observed an association of fpNRFS with shorter sleep duration of less than 8 h a night (RR 1.30, 95% confidence intervals [CI] 1.10–1.54), crying at night (RR 1.19, 95% CI 1.03–1.39), and bedtime after 22:00 (RR 1.09, 95% CI 1.00–1.18). fpNRFS may be associated with sleep problems in 1-year-old infants.
Highlights
Abnormal autonomic function may cause false-positive non-reassuring foetal status and may cause sleeping problems after birth
We previously showed an association of non-reassuring foetal status (NRFS) with temperaments, including bad mood and frequent crying for a long duration in 1-month infants[14]
These findings suggest that NRFS may be associated with sleep disorders; an association between the two has not been reported
Summary
Abnormal autonomic function may cause false-positive non-reassuring foetal status (fpNRFS) and may cause sleeping problems after birth. We previously showed an association of NRFS with temperament, including bad mood and frequent crying for long durations in 1-month-old infants. Sleep problems, such as short sleep duration or crying at night, were investigated in 1-year-old infants using a questionnaire for mothers. FpNRFS may be associated with sleep problems in 1-year-old infants. Many diagnosed NRFS cases do not show actual foetal distress. They demonstrate normal umbilical cord blood pH and normal Apgar scores. Some babies show abnormal heart rate patterns and are diagnosed with false-positive NRFS (fpNRFS), whereas others do not. Children with fpNRFS may have abnormal autonomic functions and could show abnormal sleep patterns after birth
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