title: Can estimated intravaginal ejaculatory latency time be used interchangeably with stopwatch-measured intravaginal ejaculatory latency time for the diagnosis of lifelong premature ejaculation?
abstract: OBJECTIVE
  To examine the correlation between estimated intravaginal ejaculatory latency time (eIELT) and stopwatch-measured intravaginal ejaculatory latency time (sIELT), and to assess the clinical utility of eIELT in identifying men more likely to have lifelong premature ejaculation (PE).
  
  
  METHODS
  A prospective, observational, multicenter study was conducted. Between July 2010 and August 2011, 118 healthy men aged 30-70 years, more likely to have lifelong PE, were recruited from 5 institutions in Korea. All patients underwent preliminary assessments including collection of medical and sexual history, physical examination, determination of eIELT, and the Premature Ejaculation Profile questionnaire. During the 1-week study period, patients were requested to engage in sexual intercourse at least twice and to record the sIELT.
  
  
  RESULTS
  eIELT and sIELT correlated well (r = 0.512; P < .001). However, eIELT was overestimated by a mean of 1.2 ± 0.2 minutes (median, 1.0 minutes) compared with sIELT (P = .046). eIELT showed a reduced correlation with the Premature Ejaculation Profile measures, compared with sIELT (each P-value < .05). The diagnostic accuracy of eIELT was 67.9% (P = .001), and an eIELT of 2 minutes was the acceptable cutoff value to diagnose lifelong PE.
  
  
  CONCLUSIONS
  Although eIELT correlated well with sIELT, it was overestimated by approximately 1 minute and had lower clinical utility than sIELT. Our study suggests that eIELT and sIELT cannot be directly interchanged and that caution should be used when substituting sIELT with eIELT to identify men who are more likely to have lifelong PE.
authors.affiliation: Department of Urology, College of Medicine, Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon Korea.
authors.forename: Won Ki
authors.initials: WK
authors.lastname: Lee
authors.affiliation: Kangnam Sacred Heart Hospital, Seoul, Korea.
authors.forename: Sung Tae
authors.initials: ST
authors.lastname: Cho
authors.affiliation: Kangnam Sacred Heart Hospital, Seoul, Korea.
authors.forename: Yong Seong
authors.initials: YS
authors.lastname: Lee
authors.affiliation: Kangnam Sacred Heart Hospital, Seoul, Korea.
authors.forename: Young Goo
authors.initials: YG
authors.lastname: Lee
authors.affiliation: Hallym University Sacred Heart Hospital, Anyang, Korea.
authors.forename: Cheol Young
authors.initials: CY
authors.lastname: Oh
authors.affiliation: Hallym University Sacred Heart Hospital, Anyang, Korea.
authors.forename: Changhee
authors.initials: C
authors.lastname: Yoo
authors.affiliation: Hallym University Sacred Heart Hospital, Anyang, Korea.
authors.forename: Jin Seon
authors.initials: JS
authors.lastname: Cho
authors.affiliation: Department of Urology, College of Medicine, Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon Korea.
authors.forename: Tae Young
authors.initials: TY
authors.lastname: Shin
authors.affiliation: Department of Urology, College of Medicine, Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon Korea.
authors.forename: Sang Kon
authors.initials: SK
authors.lastname: Lee
authors.affiliation: Dongtan Sacred Heart Hospital, Hwaseong, Korea.
authors.forename: Seong Ho
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Kangdong Sacred Heart Hospital, Seoul, Korea.
authors.forename: Kyungtae
authors.initials: K
authors.lastname: Ko
authors.affiliation: Kangdong Sacred Heart Hospital, Seoul, Korea. Electronic address: yang1408@hallym.or.kr.
authors.forename: Dae Yul
authors.initials: DY
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D003075:Coitus; D004542:Ejaculation / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D061686:Premature Ejaculation / Q000175:diagnosis*; D011446:Prospective Studies; D011930:Reaction Time; D014621:Vagina