title: Comparison of morphological features in the femur between femoral neck fractures and femoral intertrochanteric fractures.
abstract: OBJECTIVE
  The purpose of this study is to make proximal femur fracture types more predictable by considering morphological features of an acetabulum as well as of a proximal femur in the Japanese population.
  
  
  METHODS
  A retrospective review of radiographs of the proximal femoral fractures was conducted in patients registered from 2010 to 2012, dividing into patients with femoral neck fractures; Group Neck (n = 101), and patients with femoral intertrochanteric fractures; Group IT (n = 99). Intergroup comparison was conducted: age, sex, height, weight, the ratios of femoral intertrochanteric length (IT Length), femoral neck length (Neck Length), femoral neck width (Neck Width), lateral offset length (Offset) to femoral head diameter, neck-shaft angle (N-S angle), and center-edge angle of the acetabulum (C-E angle), adjusting for age. Multiple logistic regression analysis was conducted among these parameters.
  
  
  RESULTS
  The Group IT showed significantly older age than the Group Neck. Greater C-E angle in Group IT was observed in the patients in their 80s and 90s years of age. The Group Neck showed greater N-S angle only in the patients in their 80s years of age. In multiple logistic regression analysis, the impact of the age and the C-E angle on the fracture types was similar (odds ratio 1.08, 1.09, respectively, p < 0.01 both).
  
  
  CONCLUSIONS
  Age, N-S angle, and C-E angle could be independent predictors for determining the proximal femur fracture types.
authors.affiliation: Research Center of Health, Physical Fitness and Sports, Nagoya University, Furo-cho, Chikusa-ku, Nagoya City, Aichi, 464-8601, Japan. koun_yamauchi@yahoo.co.jp.
authors.forename: Koun
authors.initials: K
authors.lastname: Yamauchi
authors.affiliation: Department of Orthopaedic Surgery, Hikone Municipal Hospital, Hikone City, Shiga, Japan.
authors.forename: Mitsuishi
authors.initials: M
authors.lastname: Naofumi
authors.affiliation: Department of Orthopaedic Surgery, Hikone Municipal Hospital, Hikone City, Shiga, Japan.
authors.forename: Hisashi
authors.initials: H
authors.lastname: Sumida
authors.affiliation: Department of Orthopaedic Surgery, Hikone Municipal Hospital, Hikone City, Shiga, Japan.
authors.forename: Shoji
authors.initials: S
authors.lastname: Fukuta
authors.affiliation: Department of Orthopaedic Surgery, Hikone Municipal Hospital, Hikone City, Shiga, Japan.
authors.forename: Hirohiko
authors.initials: H
authors.lastname: Hori
mesh_terms: D000077:Acetabulum / Q000033:anatomy & histology; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005265:Femoral Neck Fractures / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D005269:Femur / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D006801:Humans; D016015:Logistic Models; D008297:Male; D011859:Radiography; D012189:Retrospective Studies
keywords: Acetabulum; Femur; Japanese population; Morphology; Proximal femoral fractures