目的采用直接测量的方法,对大连地区汉族成人群体指长比进行调查分析,以明确大连地区汉族成人指长比均值的分布特点,为国内开展此项研究积累资料。方法抽取大连市430名（男220,女210）健康汉族成人,采用人体测量学方法测量了其左右手第2～5指长度（掌侧）,计算各手指间的指长比值,并作性别差异和地区差异比较。结果 1.指长比:大连汉族群体2D∶3D、2D∶4D、2D∶5D、3D∶4D、3D∶5D、4D∶5D值左右侧男性分别为0.899 5、0.901 1、0.965 0、0.965 9、1.207 4、1.206 3、1.073 1、1.072 2,1.343 1、1.339 4、1.252 2、1.249 9;女性分别为0.906 5、0.907 9、0.976 6、0.975 3、1.223 0、1.222 6、1.078 1、1.075 4、1.352 7、1.350 2、1.255 1、1.255 8。男女性均表现为3D∶5D＞4D∶5D＞2D∶5D＞3D∶4D＞2D∶4D＞2D∶3D。2.性差:左右手指长比均值女性高于男性,并且2D∶3D、2D∶4D和2D∶5D有显著性差异（P＜0.05）。3.2D∶4D的百分比分布:男女性的左右手都以2D＜4D占主导,2D＞4D次之,2D=4D最少。但2D＞4D的百分比女性明显大于男性。4.2D∶4D地区差:大连汉族群体男女性均表现为低指长比,明显低于英格兰、英国利物浦、匈牙利、波兰和西班牙,高于其他地区（国家）及民族。结论大连汉族群体指长比有其独特性,2D∶4D具有明显的性别差异和地区及民族差异。

BACKGROUND: Somatotype means the external feature and physique type of human being, and is an important index to judge the nutrition state of growth and development, as well as an accessory diagnostic mean of coronary heart disease and diabetes mellitus. However, few researches on somatotype are repeated domestically.OBJECTIVE: To probe into the regulation of the distribution of the somatotype of Han students in Dalian.DESIGN: Randomized and controlled study.SETTING: Research Group of Anthropology, Department of Anatomy in Dalian Medical University.PARTICIPANTS: From June to October in 2000, totally 1 275 Han students(630 boys, 645 girls), aged 7 - 18, were selected from Dalian Heishijiao Elementary School, Dalian No. 34 Junior Middle School and Dalian No. 1 Senior Middle School, and divided into 12 groups according to their age and sex. Inclusive criteria: Han students aged 7 - 18 years; Exclusive criteria:metabolic diseases, endocrine disease and severe somatopathy.INTERVENTIONS: International anthropometric method was adopted to measure the height and body mass of the students, and the Rohrer index was used to make the classification of somatotypes.MAIN OUTCOME MEASURES: Height, body mass and Rohrer index.RESULTS: The somatotype of Han students in Dalian was changed with age,and the change was few in males but more in females. Although the somatotype was mainly presented as the asthenic type for both sexes, there was an increased tendency of moderate type in females after eleven years old. The asthenic type, moderate type and the sthenic type in all the male and female students was 74.3% and 71.5%, 17.3% and 23.1%, 8.4% and 5.4% respectively. There were significant differences in the somatotype proportions between boys and girls at the age of eleven, twelve, sixteen and seventeen years old( P ＜ 0.05). The mean value of the Rohrer index for Han students aged 7 - 17 years in Dalian was much higher in 2000 than that in 1974.CONCLUSION: The somatotype of Han students in Dalian is mainly in the asthenic type, and the physique was obviously improved in the past 26 years.