Abe Noriko, Kodama Hideya
Japanese Red Cross Akita College of Nursing, Akita Graduate School of Medicine and Faculty of Medicine, School of Health Science, Akita, Japan.
Pediatr Int. 2015 Apr;57(2):227-33. doi: 10.1111/ped.12473. Epub 2014 Nov 10.
The objective of this study was to explore the possibility of using distal-proximal skin temperature gradient (DPG) to predict sleep-onset latency of night-time sleep for infants at home.
Foot (for distal) and abdominal (for proximal) skin temperature during sleep onset in healthy infants, aged 4-9 months, was continuously recorded using a temperature logger at home. Sleep-onset latency during each study night was defined as the interval from lights-off to sleep onset, determined on actigraphy. Association of DPG profile after lights-off with sleep-onset latency on the study nights was evaluated.
Data for 43 nights from 28 infants were available for analysis. With regard to low DPG (<-2.5°C) at lights-off, >60% of infants fell asleep within 30 min if DPG was increased to ≥-2.5°C within 15 min after lights-off. If DPG remained at <-2.5°C at 15 min after lights-off, however, only 20% of infants fell asleep within 30 min. In addition, if infants were still awake at 15 min after lights-off and the DPG at that time was <-2.5°C, they were not likely to quickly fall asleep (predictive value was 0.875).
Increase in DPG by 15 min after lights-off is a key determinant for sleep-onset latency.
本研究的目的是探讨利用远端-近端皮肤温度梯度（DPG）预测婴儿在家夜间睡眠入睡潜伏期的可能性。
使用温度记录仪在家连续记录4至9个月健康婴儿入睡期间的足部（远端）和腹部（近端）皮肤温度。每个研究夜晚的入睡潜伏期定义为熄灯至入睡的间隔时间，通过活动记录仪确定。评估熄灯后DPG曲线与研究夜晚入睡潜伏期的相关性。
28名婴儿的43个夜晚的数据可供分析。对于熄灯时低DPG（<-2.5°C）的情况，如果熄灯后15分钟内DPG升高到≥-2.5°C，超过60%的婴儿在30分钟内入睡。然而，如果熄灯后15分钟时DPG仍保持在<-2.5°C，只有20%的婴儿在30分钟内入睡。此外，如果婴儿在熄灯后15分钟仍未入睡且此时DPG<-2.5°C，他们不太可能很快入睡（预测值为0.875）。
熄灯后15分钟内DPG的升高是入睡潜伏期的关键决定因素。
