title: Sexual function of premature ejaculation patients assayed with Chinese Index of Premature Ejaculation.
abstract: OBJECTIVE
  To assess the psychometric properties of the Chinese Index of Premature Ejaculation (CIPE).
  
  
  METHODS
  The sexual function of 167 patients with and 114 normal controls without premature ejaculation (PE) were evaluated with CIPE. All subjects were married and had regular sexual activity. The CIPE has 10 questions, focusing on libido, erectile function, ejaculatory latency, sexual satisfaction and difficulty in delaying ejaculation, self-confidence and depression. Each question was responded to on a 5 point Likert-type scale. The individual question score and the total scale score were analyzed between the two groups.
  
  
  RESULTS
  There were no significant differences between the age, duration of marriage and educational level (P> 0.05) of patients with and without PE and normal controls. The mean latency of patients with PE and normal controls were 1.6 +/- 1.2 and 10.2 +/- 9.5 minutes, respectively. Significant differences between patients with (26.7 +/- 4.6) PE and normal controls (41.9 +/- 4.0) were observed on the total score of CIPE (P< 0.01). Using binary logistic regression analysis, PE was significantly related to five questions of the original measure. They are the so-called the CIPE-5 and include: ejaculatory latency, sexual satisfaction of patients and sexual partner, difficulty in delaying ejaculation, anxiety and depression. Receiver Operating Characteristic (ROC) curve analysis of CIPE-5 questionnaire indicated that the sensitivity and specificity of CIPE were 97.60 % and 94.74 %, respectively. Employing the total score of CIPE-5, patients with PE could be divided into three groups: mild (>15 point) 19.8 %, moderate (10-14 point) 62.8 % and severe (< 9 point) 16.7 %.
  
  
  CONCLUSIONS
  The CIPE-5 is a useful method for the evaluation of sexual function of patients with PE and can be used as a clinical endpoint for clinical trials studying the efficacy of pharmacological intervention.
authors.affiliation: Department of Urology, 1st Hospital, Peking University, Beijing 100034, China.
authors.forename: Yi-Ming
authors.initials: YM
authors.lastname: Yuan
authors.forename: Zhong-Cheng
authors.initials: ZC
authors.lastname: Xin
authors.forename: Hui
authors.initials: H
authors.lastname: Jiang
authors.forename: Yan-Jie
authors.initials: YJ
authors.lastname: Guo
authors.forename: Wu-Jiang
authors.initials: WJ
authors.lastname: Liu
authors.forename: Long
authors.initials: L
authors.lastname: Tian
authors.forename: Ji-Chuan
authors.initials: JC
authors.lastname: Zhu
mesh_terms: D000328:Adult; D000368:Aged; D000465:Algorithms; D002681:China; D003075:Coitus; D004542:Ejaculation; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009948:Orgasm / Q000502:physiology; D010410:Penile Erection / Q000502:physiology; D011594:Psychometrics; D012372:ROC Curve; D012735:Sexual Dysfunction, Physiological / Q000145:classification / Q000175:diagnosis* / Q000523:psychology*; D011795:Surveys and Questionnaires; D013997:Time Factors