title: Reliability of four experimental mechanical pain tests in children.
abstract: OBJECTIVE
  In order to study pain in children, it is necessary to determine whether pain measurement tools used in adults are reliable measurements in children. The aim of this study was to explore the intrasession reliability of pressure pain thresholds (PPT) in healthy children. Furthermore, the aim was also to study the intersession reliability of the following four tests: (1) Total Tenderness Score; (2) PPT; (3) Visual Analog Scale score at suprapressure pain threshold; and (4) area under the curve (stimulus-response functions for pressure versus pain).
  
  
  METHODS
  Twenty-five healthy school children, 8-14 years of age, participated. Test 2, PPT, was repeated three times at 2 minute intervals on the same day to estimate PPT intrasession reliability using Cronbach's alpha. Tests 1-4 were repeated after median 21 (interquartile range 10.5-22) days, and Pearson's correlation coefficient was used to describe the intersession reliability.
  
  
  RESULTS
  The PPT test was precise and reliable (Cronbach's alpha ≥ 0.92). All tests showed a good to excellent correlation between days (intersessions r = 0.66-0.81). There were no indications of significant systematic differences found in any of the four tests between days.
  
  
  CONCLUSIONS
  All tests seemed to be reliable measurements in pain evaluation in healthy children aged 8-14 years. Given the small sample size, this conclusion needs to be confirmed in future studies.
authors: Department of Pediatrics, Children's Headache Clinic, Copenhagen University Hospital Herlev, Copenhagen, Denmark.
authors: Ann-Britt L
authors: AB
authors: Soee
authors: Lise L
authors: LL
authors: Thomsen
authors: Birte
authors: B
authors: Tornoe
authors: Liselotte
authors: L
authors: Skov
keywords: algometer; intraindividual reliability; pain measurement; pressure pain threshold; repeatability
references: Behav Modif. 2006 Jan;30(1):93-113
references: 16330521
references: Curr Rheumatol Rep. 2005 Oct;7(5):342-7
references: 16174481
references: Lancet Neurol. 2006 Mar;5(3):268-74
references: 16488382
references: Cephalalgia. 2002 Jun;22(5):401-8
references: 12110116
references: J Orofac Pain. 1998 Winter;12(1):42-51
references: 9656898
references: Pediatrics. 2010 Jul;126(1):e187-94
references: 20530075
references: J Orofac Pain. 2007 Spring;21(2):133-42
references: 17547125
references: Eur J Pain. 2006 Oct;10(7):581-5
references: 16203164
references: Pediatr Neurol. 2005 Nov;33(5):303-13
references: 16243216
references: Can J Neurol Sci. 2009 Nov;36(6):687-95
references: 19960746
references: Cephalalgia. 2010 Sep;30(9):1049-55
references: 20713555
references: J Rehabil Med. 2004 Jan;36(1):17-27
references: 15074434
references: Pain. 1994 Nov;59(2):235-239
references: 7892021
references: Pain. 1996 May-Jun;65(2-3):259-64
references: 8826515
references: Man Ther. 2010 Oct;15(5):508-12
references: 20430686
references: Phys Ther. 1998 Feb;78(2):160-9
references: 9474108
references: Cephalalgia. 2000 Jun;20(5):486-508
references: 11037746
references: BMJ. 1997 Feb 22;314(7080):572
references: 9055718
references: Cephalalgia. 2002 Jun;22(5):340-4
references: 12110109
references: Cephalalgia. 1995 Jun;15(3):205-10
references: 7553810
references: Pain. 2003 Feb;101(3):259-266
references: 12583868
references: Cephalalgia. 1987 Dec;7(4):249-55
references: 3427625