title: The ratio of femoral head diameter to pelvic height in the normal hips of a Chinese population.
abstract: OBJECTIVE
  The aim of this study was to determine whether the ratio between the femoral head diameter and pelvic height in a Chinese population is the same as that found in Westerners.
  
  
  METHODS
  Standard pelvic radiography was performed on a group of 187 Chinese adult subjects consisting of 81 males and 106 females with a mean age of 40 years (21-68 years). Femoral head diameter (vertical distance from the femoral head-neck junction to the highest point of the femoral head) and pelvic height (vertical distance from the highest point of the iliac crest to the edge of the ischial tuberosities) were measured.
  
  
  RESULTS
  There were significant differences between males and females (p < 0.001), and between persons of high height versus low height (p = 0.011) and medium height (p = 0.039). There were no significant differences between persons of different age (p = 0.244), body mass index (p = 0.091), or between persons of low- and medium-height groups (p = 0.69). The overall mean ratio between the femoral head diameter and pelvic height was 0.215 (0.173-0.249) with a 95 % CI = 0.214-0.217. The mean ratios in males and females were 0.221 (0.194-0.249) and 0.211 (0.173-0.238), respectively.
  
  
  CONCLUSIONS
  The mean ratio in Chinese population was similar to the reported ratio in a western population (about 1:5). We suggest that Chinese surgeons may be able to use the Crowe classification to classify patients with hip dysplasia.
authors: Department of Orthopedics, Second Hospital of Jilin University, Changchun, 130041, China.
authors: Yanbo
authors: Y
authors: Zhang
authors: Jinlan
authors: J
authors: Jiang
authors: Chenyu
authors: C
authors: Wang
authors: Jianlin
authors: J
authors: Zuo
authors: Modi
authors: M
authors: Yang
authors: Jincheng
authors: J
authors: Wang
mesh_terms: D000328:Adult; D000368:Aged; D044466:Asian People; D001827:Body Height; D002681:China; D005260:Female; D005270:Femur Head / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D064368:Healthy Volunteers; D006617:Hip Dislocation / Q000145:classification; D006801:Humans; D007085:Ilium / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D007512:Ischium / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012737:Sex Factors; D055815:Young Adult
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