title: The optimal threshold values for the severity of urinary incontinence based on the 1-hour pad test.
abstract: OBJECTIVE
  To explore the correlation between the 1-hour pad test and Stamey incontinence grading and to obtain the optimal threshold values for the severity of urinary incontinence.
  
  
  METHODS
  In a cross-sectional retrospective study at Peking Union Medical College Hospital, 1-hour pad test results and Stamey grades of female patients who had undergone therapy for urinary incontinence between June 2005 and December 2010 were reviewed. The correlation between the objective and subjective measurements was assessed via a Spearman rank correlation test. The optimal diagnostic threshold was evaluated by ROC curve, and areas under the ROC curve reflected the accuracy of the 1-hour pad test.
  
  
  RESULTS
  A strong positive correlation was found between the 1-hour pad test results and the subjective grades of 320 patients (correlation coefficient 0.757, P<0.001). On the basis of the 1-hour pad test, the optimal diagnostic cutoff points for the severity of urinary incontinence were 3.4 g and 10.2g.
  
  
  CONCLUSIONS
  The 1-hour pad test could assess the severity of urinary incontinence accurately. The threshold values should be, approximately, less than 3g for mild, 3-10 g for moderate, and more than 10 g for severe urinary incontinence.
authors.affiliation: Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Lan
authors.initials: L
authors.lastname: Zhu
authors.forename: Tao
authors.initials: T
authors.lastname: Xu
authors.forename: Jinghe
authors.initials: J
authors.lastname: Lang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D059026:Diagnostic Self Evaluation; D003950:Diagnostic Techniques, Urological; D005260:Female; D006801:Humans; D008875:Middle Aged; D012372:ROC Curve; D012016:Reference Values; D012189:Retrospective Studies; D013997:Time Factors; D014549:Urinary Incontinence / Q000175:diagnosis*