title: Pelvic inflammatory disease: a retrospective clinical analysis of 1,922 cases in North China.
abstract: OBJECTIVE
  To identify the cause of pelvic inflammatory disease (PID) in Shanxi, North China.
  
  
  METHODS
  Retrospective analysis of 1,922 women with PID who underwent laparoscopy for infertility.
  
  
  RESULTS
  1,922 cases (42.3%) of PID were detected in 4,540 cases of infertility, wherein the incidence rates of nonspecific PID and female genital tuberculosis (FGTB) were 57.9 and 42.1%, respectively. From 1985 to 1995, FGTB (25.1%) was the first reason for infertility, while from 1996 to 2006, nonspecific PID (33.9%) emerged as the most common cause of infertility. Further, FGTB (74.7%) was the major factor causing occluded fallopian tubes, followed by nonspecific PID (61.1%), and the damage of the former was more serious than the latter.
  
  
  CONCLUSIONS
  PID is the main cause of tubal infertility, but the etiology of PID has changed from FGTB to nonspecific PID in the last 10 years in Shanxi.
authors.affiliation: Department of Obstetrics and Gynecology, Shanxi Medical University Second Hospital, Taiyuan, PR China.
authors.forename: Wei-Hong
authors.initials: WH
authors.lastname: Zhao
authors.forename: Min
authors.initials: M
authors.lastname: Hao
mesh_terms: D000328:Adult; D002681:China; D005184:Fallopian Tube Diseases / Q000382:microbiology*; D005260:Female; D006801:Humans; D006940:Hyperemia / Q000150:complications; D007247:Infertility, Female / Q000209:etiology*; D010535:Laparoscopy; D010048:Ovarian Cysts / Q000150:complications; D000292:Pelvic Inflammatory Disease / Q000150:complications* / Q000175:diagnosis / Q000382:microbiology; D012189:Retrospective Studies; D000267:Tissue Adhesions / Q000150:complications; D014384:Tuberculosis, Female Genital / Q000150:complications*; D014591:Uterine Diseases / Q000150:complications