出生季节对婴儿GrafⅡa型髋关节检出率的影响

Effect of birth season on detection rate of Graf type Ⅱa hip joint

目的探讨出生季节对GrafⅡa型髋关节婴儿检出率的影响。方法选择2016年5月至2017年5月在海盐县妇幼保健院出生,应用静态Graf法超声普查髋关节的4 037例婴儿作为总样本,从中选出冬季(冬季组,1 563例)和夏季(夏季组,1 712例)出生的婴儿作为研究对象,计算Ⅱa型髋关节婴儿在相应季节的检出率及男女婴在各自性别中的检出率,用卡方检验进行统计学分析。结果 5.00%(164/3 275)受检婴儿被检测出Ⅱa型髋关节。冬季组和夏季组该型髋关节婴儿在相应季节的检出率分别为6.33%(99/1 563)、3.80%(65/1 712),差异有统计学意义(χ~2=11.06,P=0.001);冬季组男女婴在各自性别中的检出率分别为5.04%(42/832)、7.79%(57/731),差异有统计学意义(χ~2=4.96,P=0.026);夏季组男女婴在各自性别中的检出率分别为3.01%(25/830)、4.54%(40/882),差异无统计学意义(χ~2=2.72,P=0.099)。结论出生季节对婴儿GrafⅡa型髋关节检出率有显著影响,对冬季出生女婴应更加关注。

Objective To analyze the effect of birth season on detection rate of Graf type Ⅱa hipjoint.Methods Infants borned in May 2016 to May 2017 were selected as a total sample,by using the staticGraf technique,all those infants were examed by ultrasound.Winter（W） group （1 563 infants） and summer（S） group （1 712 infants） were selected as the studying subjects.The detection rates in the correspondingseason and gender of infants with type Ⅱa hip were calculated respectively,which were analyzed by chi-square test.Results Type Ⅱa hip was detected in 5.00%（164 / 3 275） infants.The detection rates of infantswith type Ⅱa hip corresponding to two groups were 6.33%（99 / 1 563） and 3.80%（65 / 1 712） respectively.The difference was statistically significant （χ2= 11.06,P = 0.001）.The rates of male and female infants withtype Ⅱa hip detected in W group were 5.04%（42 / 832）,7.79%（57 / 731） respectively.The difference wasstatistically significant （χ2= 4.96,P = 0.026）.The rates of male and female infants with type Ⅱa hip detectedin S group were 3.01%（25 / 830）,4.54%（40 / 882）respectively.The difference was not statistically significant（χ2= 2.72,P = 0.099）.Conclusions The birth season has a significant effect on the detection rate of Graf Ⅱa hip,and winter-born baby girl should be paid more attention.