Objective To understand the infantile nocturnal sleep-wake pattern developmental trajectory with Actiwatch,and to be benefit to the clinical assessment of infantile sleep. Methods Longitudinal study was conducted between October,2009 and October 2011 in Maternal and Child Health Care Hospital of Haidian district.Actiwatch was used to track the sleep-wake pattern development trajectory of health infants in the first year of life in the home setting.Participating infant were followed up at monthly from the 1~6 months after birth,and then at 9 months and 12 months of age respectively.Meanwhile,infantile sleep was observed continuously for about 60 hours at each visit.Data of 32 infants were collected with Actigraphy. Results With infants' age increasing,the nocturnal sleep duration(366.07~497.04 min)and the longest continuous interval (213.21~381.10 min)increased.Compared with the first month,the nocturnal sleep duration at 5 months increased 102.57 minutes,the longest continuous sleeping interval at 6 months increased 99.39 minutes,these differences were statistically significant (t=4.12,5.45,P＜0.05).The latency of infants' nighttime sleeponset (56.85~15.13 min)and the number of nighttime awakening(2.83~1.60 times) decreased with age.Compared with the first month,the latency of infants' nighttime sleep onset at 4 months decreased 29.65 minutes,the numbers of nighttime awakening at 5 months decreased 0.36 times,these difference were statistically significant (t=9.47,3.51,P＜0.05).There were no significant differences between adjacent ages and sex. Conclusions During the first 4~6 months after birth,infantile sleep-wake pattern undergo obvious change.The capability of sleep-onset and uninterrupted sleep improve with age.
Key words
sleep /
longitudinal study /
infants
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