Abstract: ［Abstract］ Objective〖HTSS〗〓To investigate the sleep symptoms and polysomnographic patterns of obstructive sleep apnea in obese children and to explore the relationship between the index of weight for height and obstructive sleepapnea/hypopnea syndrome(OSAHS) parameters.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓Sixtyeight simple obese children(age 2-12 years old) with OSAHS and the same period to hospital physical examination of seventy healthy children were enrolled in this study. Polysomnography(PSG) was done for the diagnosis of obstructive sleep apnea and every child was monitored with PSG. According to the weight for height index of the OSAHS, groups were divided into mild, moderate and severe obesity group. The mean oxygen saturation(MSaO2)， the lowest oxygen saturation (LSaO2)， more than 3% of the oxygen desaturation index(ODI), SaO2 less than or equal to 90% and the weight for height index were recorded. PSG data of OSAHS group and control group were recorded and analyzed.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓The apneahypopneaindex(AHI) and ODI of patients in group OSAHS were significantly higher than those in control group. LSaO2 was significantly lower than the control group, the difference was statistically significant(P＜005). AHI of severe OSAHS patients was higher than that of mild and moderate(P＜005), and there was no statistically significant difference between mildtomoderate group(P＞005). The ODI of moderate and severe subgroups were higher than those in mild group(P＜005), the ODI of severe subgroups were higher than those in moderate subgroups(P＜005). In mild subgroups, moderate and severe subgroup，MSaO2 was higher and LSaO2 was lower than those in mild group(P＜0.05).
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓Obese children have a higher risk for OSAHS，and the severity of obesity was positively related to the severity of OSAHS.