Objective To analyze the clinical and polysomnography (PSG) data ofchildren with obstructive sleep apnea hypopnea syndrome (OSAHS) in different seasons, and to explore the influence of seasonal factors on children with OSAHSin Suzhou area. Methods From March 2017 to February 2019, children with snoring, mouth breathing and other symptoms who visited Respiratory Medicine Department of Children's Hospital of Soochow University and had PSG examination were selected into this study. Then the participants were divided into two groups:≤6 years old and ＞6 years old. The differences in diagnosis, sleep structure, obstructive apnea hypopnea index (OAHI), oxygen desaturation index (ODI), the lowest oxygen saturation(LSAO2) among different seasons between the two groups were compared. Results 1) Among 227 OSAHS cases, the lowest OSAHS detection rate was in summer (χ2=8.964, P=0.03). 2) There was no significantly seasonal difference in diagnosis rates of children with mild, moderate and severe OSAHS (P>0.05). 3)The proportion of non-rapid movement 2 (NREM2) of OSAHS in spring was lower than in summer and winter (P＜0.05).The proportion of rapid eye movement (REM) in spring was higher than that in summer and winter (P＜0.05).The proportion of non-rapid movement 3 (NREM3) in summer was lower than that in spring and winter (P＜0.05). 4) LSaO2 in spring was lower than that in summer (P＜0.001). REM-apnea index(REM-AI) in spring was higher than that in autumn and winter (P＜0.05). 5) The proportion of NREM2 stage in OSAHS children ≤6 years old in spring was lower than that in summer (P＜0.001). The proportion of NREM3 in summer was lower than that in spring and winter (P＜0.05), and the proportion of REM in spring was higher than that in winter (P=0.048). Respiratory events and oxygen saturation analysis showed that LSaO2 (%) in spring was lower than that in summer (P=0.004). REM-AI in spring was higher than that in winter (P<0.01). Conclusions Seasonal factors have no significant effect on the severity of OSAHS in children. Sleep structure and respiratory events of OSAHS are different in seasons, such changes are mainly in children at the age of 6 years old and younger.
Key words
obstructive sleep apnea hypopnea syndrome /
children /
season /
sleep structure /
polysomnography
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