title: Validity, reliability, and responsiveness of the fingertip-to-floor test.
abstract: OBJECTIVE
  To evaluate the validity, reliability, and responsiveness of the fingertip-to-floor test to assess total mobility when bending forward in standing position.
  
  
  METHODS
  Experimental, prospective, correlational.
  
  
  METHODS
  Rehabilitation and radiology departments in a university hospital in France.
  
  
  METHODS
  Ten patients (6 women, 4 men; mean age, 42yr) with chronic low back pain (LBP) in the validity study; 32 LBP patients (16 women, 16 men; mean age, 52yr) in the reliability study; and 72 LBP patients (22 women, 50 men; mean age, 30yr) in the responsiveness study.
  
  
  METHODS
  Dynamic radiographs and fingertip-to-floor test.
  
  
  METHODS
  For the validity study, 2 lateral radiographs of the upper dorsal spine, 1 in neutral position, and then 1 in full trunk flexion, were made. Validity was assessed by means of Spearman's correlation coefficient. Reliability was studied by using intraclass correlation coefficient (ICC) and the Bland and Altman method. Responsiveness was assessed by the effect size and the standardized response mean (SRM).
  
  
  RESULTS
  The Spearman's correlation coefficient for trunk flexion assessed by the test and the radiologic measure was excellent (r(s) = -.96). The intra- and interobserver reliability were excellent (ICC = .99). The Bland and Altman method showed no systematic trend. The values observed for the test were .97 for SRM and .87 for effect size.
  
  
  CONCLUSIONS
  Because the fingertip-to-floor test has excellent validity, reliability, and responsiveness, it can be used in clinical practice and therapeutic trials.
authors.affiliation: Hôpital Cochin, Service de rééducation et de réadaptation de l'appareil locomoteur et des pathologies du rachis, Assistance Publique-Hopitaux de Paris, Université René Descartes, Paris, France.
authors.forename: C
authors.initials: C
authors.lastname: Perret
authors.forename: S
authors.initials: S
authors.lastname: Poiraudeau
authors.forename: J
authors.initials: J
authors.lastname: Fermanian
authors.forename: M M
authors.initials: MM
authors.lastname: Colau
authors.forename: M A
authors.initials: MA
authors.lastname: Benhamou
authors.forename: M
authors.initials: M
authors.lastname: Revel
mesh_terms: D000328:Adult; D002908:Chronic Disease; D005080:Exercise Test; D005260:Female; D006801:Humans; D017116:Low Back Pain / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000534:rehabilitation; D008297:Male; D008875:Middle Aged; D010388:Pelvis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D026741:Physical Therapy Modalities; D011187:Posture; D011446:Prospective Studies; D011859:Radiography; D016059:Range of Motion, Articular; D015203:Reproducibility of Results; D013131:Spine / Q000000981:diagnostic imaging / Q000503:physiopathology*; D018709:Statistics, Nonparametric