Effect of birth season on detection rate of Graf type Ⅱa hip joint
Xu Mingmin1,Ma Shengqun2,Gan Xiaoling3,Wang Ting1
1Department of Ultrasound,the first Hospital of Jiaxing City,Jiaxing 314001,China;2Department of Ultrasound,3Department of Child Care,Haiyan County Maternal and Child Health Hospital,Haiyan 314300，China
Abstract：ObjectiveTo analyze the effect of birth season on detection rate of Graf type Ⅱa hip joint.MethodsInfants borned in May 2016 to May 2017 were selected as a total sample,by using the static Graf technique,all those infants were examed by ultrasound.Winter(W) group (1563 infants）and summer (S) group (1712 infants) were selected as the studying subjects.The detection rates in the corresponding season and gender of infants with type Ⅱa hip were calculated respectively,which were analyzed by chi-square test.ResultsType Ⅱa hip was detected in 5.00%（164/3275） infants.The detection rates of infants with type Ⅱa hip corresponding to two groups were 6.33%（99/1563） and 3.80%（65/1712） respectively.The difference was statistically significant (χ2=11.06，P=0.001).The rates of male and female infants with type Ⅱa hip detected in W group were 5.04%（42/832）,7.79%（57/731）respectively.The difference was statistically significant (χ2=4.96，P=0.026).The rates of male and female infants with type Ⅱa hip detected in S group were 3.01%（25/830）,4.54%（40/882）respectively.The difference was not statistically significant (χ2=2.72，P=0.099).ConclusionsThe birth season has a significant effect on the detection rate of Graf Ⅱ a hip,and winterborn baby girl should be paid more attention.
徐明民1马盛群2干小玲3王庭1 . 出生季节对婴儿Graf Ⅱa型髋关节检出率的影响[J]. 中华诊断学电子杂志, 2017, 5(4): 263-266.
Xu Mingmin1,Ma Shengqun2,Gan Xiaoling3,Wang Ting1. Effect of birth season on detection rate of Graf type Ⅱa hip joint. zhzdx, 2017, 5(4): 263-266.
