title: Investigation of correlation between diameters of pelvic inlet and outlet planes and female pelvic floor dysfunction.
abstract: OBJECTIVE
  To investigate correlation between key diameters of pelvic inlet and outlet planes and female pelvic floor dysfunction (FPFD).
  
  
  METHODS
  Correlation with incidence of FPFD was analyzed by measuring the two diameters of pelvic inlet and outlet planes (i.e. anteroposterior diameter of pelvic inlet and transverse diameter of pelvic outlet) in 298 patients with FPFD and 508 patients in control group taking into account of other relevant factors.
  
  
  RESULTS
  The transverse diameter of pelvic outlet was significantly larger in experimental group than in control group (9.55cm vs. 8.50cm, P<0.01); while the difference in anteroposterior diameter of pelvic inlet between the two groups was not statistically significant (11.63cm vs. 11.26cm, P=0.205>0.01); Binary logistic regression analysis indicated that the anteroposterior diameter of pelvic inlet was not correlated with incidence of FPFD, but the transverse diameter of pelvic outlet was one of the influencing factor for FPFD.
  
  
  CONCLUSIONS
  The transverse diameter of pelvic outlet is closely correlated with incidence of FPFD and represents one of the risk factors for FPFD; a transverse diameter of pelvic outlet greater than 9.5cm is the threshold for onset of FPFD and can be used as an early predictive index for FPFD.
authors.affiliation: Department of Gynecology and Pelvic Floor Disease, Shengjing Hospital of China Medical University, Shenyang 110004, PR China.
authors.forename: Hai-Nan
authors.initials: HN
authors.lastname: Xu
authors.forename: Zhi-Jun
authors.initials: ZJ
authors.lastname: Xia
authors.forename: Bao-Xiang
authors.initials: BX
authors.lastname: Li
authors.forename: Yi-Tong
authors.initials: YT
authors.lastname: Yin
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.forename: Qing
authors.initials: Q
authors.lastname: Hu
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D002681:China; D005260:Female; D006801:Humans; D015994:Incidence; D008875:Middle Aged; D009929:Organ Size; D059952:Pelvic Floor Disorders / Q000453:epidemiology / Q000473:pathology*; D010387:Pelvimetry; D010388:Pelvis / Q000473:pathology*; D011237:Predictive Value of Tests; D012307:Risk Factors