目的 通过MRI测量正常第二肩关节肩峰外侧点到肱骨头(A-H)之间的距离,根据不同性别、身高、体重、年龄进行分组,比较不同分组间的统计学差异.方法 对200例健康成人志愿者采用1.5 T MRI设备测量中立位位置时A-H距离.根据不同的性别、身高、体重、年龄进行分组,并进行统计学分析.结果 200例健康成人志愿者中,测得A-H距离最大为14.8 mm,最小为7.8mm.A-H距离男性大于女性,差异有统计学意义(P＜0.05).按身高分为＜ 160、160～169、170～179、≥180 cm4组,除身高≥180 cm组与＜160 cm组AH距离比较差异有统计学意义(P＜0.05)外,其他各组两两比较差异均无统计学意义(P＞0.05).按BMI分为＜18.5、18.5 ～24.99、≥25 kg/m2 3组,3组两两比较差异均无统计学意义(P＞0.05).按年龄≤40、41～65、≥66岁分为3组,3组两两比较差异均无统计学意义(P＞0.05).结论 A-H距离有性别及身高差异,体重、年龄各组差异无统计学意义,可以解释女性患者肩峰下撞击综合征患病率高的现象.%Objective To measure the distance between the lateral point of acromion to the head of humerus (A-H) of nomoral subarcromial space by MRI,and divid into different groups by gender,height,weight,age,to understand different groups whether have statistical significance.Methods The 200 healthy adult volunteers were selected,applied 1.5 T MRI examination to measure the A-H distance in neutral position,and then were divided into different groups according to the gender,height,weight,age,the data were statistically analyzed.Results The maximum A-H distance was 14.8 mm,the minimum was 7.8 mm.The A-H distance between the male and female was statistical significance(P ＜ 0.05),and the male was longer than the female.Divided different height into ＜ 160,160 ～ 169,170 ～179,≥ 180 cm 4 groups,the A-H distance between groups of ≥ 180 cm and ＜ 160 cm were statistical significant difference (P ＜ 0.05),the other groups had no significant difference (.P ＞ 0.05).According to BMI,divided into ＜ 18.5,18.5 ～ 24.99,25 kg/m2 3 groups,all 3 groups had no significant difference (P ＞ 0.05).According to age,divided into ≤ 40,41 ～ 65,≥ 66 years 3 groups,all 3 groups had no statistical significance (P ＞ 0.05).Conclusions The A-H distance has statistical significance in gender and height,and has no statistical significance in weight,age,which can explain the phenomenon that women patients have the high prevalence of subacromial impingement syndrome.
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